CINXE.COM
<!DOCTYPE html><html lang="en" dir="ltr"><head><meta charSet="utf-8" data-next-head=""/><meta name="viewport" content="width=device-width, initial-scale=1" data-next-head=""/><script async="" src="https://www.googletagmanager.com/gtag/js?id=G-B1E83PJ3RT"></script><title data-next-head="">Passing Data Deeply with Context – React</title><link rel="canonical" href="https://react.dev/learn/passing-data-deeply-with-context" data-next-head=""/><link rel="alternate" href="https://react.dev/learn/passing-data-deeply-with-context" hrefLang="x-default" data-next-head=""/><link rel="alternate" hrefLang="en" href="https://react.dev/learn/passing-data-deeply-with-context" data-next-head=""/><link rel="alternate" hrefLang="zh-hans" href="https://zh-hans.react.dev/learn/passing-data-deeply-with-context" data-next-head=""/><link rel="alternate" hrefLang="es" href="https://es.react.dev/learn/passing-data-deeply-with-context" data-next-head=""/><link rel="alternate" hrefLang="fr" href="https://fr.react.dev/learn/passing-data-deeply-with-context" data-next-head=""/><link rel="alternate" hrefLang="ja" href="https://ja.react.dev/learn/passing-data-deeply-with-context" data-next-head=""/><link rel="alternate" hrefLang="tr" href="https://tr.react.dev/learn/passing-data-deeply-with-context" data-next-head=""/><link rel="alternate" hrefLang="ko" href="https://ko.react.dev/learn/passing-data-deeply-with-context" data-next-head=""/><meta property="fb:app_id" content="623268441017527" data-next-head=""/><meta property="og:type" content="website" data-next-head=""/><meta property="og:url" content="https://react.dev/learn/passing-data-deeply-with-context" data-next-head=""/><meta property="og:title" content="Passing Data Deeply with Context – React" data-next-head=""/><meta property="og:description" content="The library for web and native user interfaces" data-next-head=""/><meta property="og:image" content="https://react.dev/images/og-learn.png" data-next-head=""/><meta name="twitter:card" content="summary_large_image" data-next-head=""/><meta name="twitter:site" content="@reactjs" data-next-head=""/><meta name="twitter:creator" content="@reactjs" data-next-head=""/><meta name="twitter:title" content="Passing Data Deeply with Context – React" data-next-head=""/><meta name="twitter:description" content="The library for web and native user interfaces" data-next-head=""/><meta name="twitter:image" content="https://react.dev/images/og-learn.png" data-next-head=""/><meta name="google-site-verification" content="sIlAGs48RulR4DdP95YSWNKZIEtCqQmRjzn-Zq-CcD0" data-next-head=""/><meta name="algolia-search-order" content="40" data-next-head=""/><link rel="preload" href="/fonts/Source-Code-Pro-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous" data-next-head=""/><link rel="preload" href="https://react.dev/fonts/Optimistic_Display_W_Md.woff2" as="font" type="font/woff2" crossorigin="anonymous" data-next-head=""/><link rel="preload" href="https://react.dev/fonts/Optimistic_Display_W_SBd.woff2" as="font" type="font/woff2" crossorigin="anonymous" data-next-head=""/><link rel="preload" href="https://react.dev/fonts/Optimistic_Display_W_Bd.woff2" as="font" type="font/woff2" crossorigin="anonymous" data-next-head=""/><link rel="preload" href="https://react.dev/fonts/Optimistic_Text_W_Md.woff2" as="font" type="font/woff2" crossorigin="anonymous" data-next-head=""/><link rel="preload" href="https://react.dev/fonts/Optimistic_Text_W_Bd.woff2" as="font" type="font/woff2" crossorigin="anonymous" data-next-head=""/><link rel="preload" href="https://react.dev/fonts/Optimistic_Text_W_Rg.woff2" as="font" type="font/woff2" crossorigin="anonymous" data-next-head=""/><link rel="preload" href="https://react.dev/fonts/Optimistic_Text_W_It.woff2" as="font" type="font/woff2" crossorigin="anonymous" data-next-head=""/><link rel="preconnect" href="https://1FCF9AYYAT-dsn.algolia.net" data-next-head=""/><link rel="preload" href="/_next/static/css/30a0450f062b33f4.css" as="style"/><link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png"/><link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png"/><link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png"/><link rel="manifest" href="/site.webmanifest"/><link rel="mask-icon" href="/safari-pinned-tab.svg" color="#404756"/><meta name="msapplication-TileColor" content="#2b5797"/><meta name="theme-color" content="#23272f"/><link rel="preload" as="image" imageSrcSet="/_next/image?url=%2Fimages%2Fuwu.png&w=64&q=75 1x, /_next/image?url=%2Fimages%2Fuwu.png&w=128&q=75 2x" data-next-head=""/><link rel="stylesheet" href="/_next/static/css/30a0450f062b33f4.css" data-n-g=""/><noscript data-n-css=""></noscript><script defer="" noModule="" src="/_next/static/chunks/polyfills-42372ed130431b0a.js"></script><script src="/_next/static/chunks/webpack-35e65ce5d83d5425.js" defer=""></script><script src="/_next/static/chunks/framework-76ad44d61c11f057.js" defer=""></script><script src="/_next/static/chunks/main-6b2aa10951d4c273.js" defer=""></script><script src="/_next/static/chunks/pages/_app-6d7b64b3b21a9551.js" defer=""></script><script src="/_next/static/chunks/668-e65a23e6848f265b.js" defer=""></script><script src="/_next/static/chunks/679-d6cf26e485b33427.js" defer=""></script><script src="/_next/static/chunks/pages/%5B%5B...markdownPath%5D%5D-df3d4d0e644b3e5c.js" defer=""></script><script src="/_next/static/3uPtO_P1aNtF_ZQSjeirn/_buildManifest.js" defer=""></script><script src="/_next/static/3uPtO_P1aNtF_ZQSjeirn/_ssgManifest.js" defer=""></script></head><script>window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments);}gtag('js', new Date());gtag('config', 'G-B1E83PJ3RT');</script><body class="font-text font-medium antialiased text-lg bg-wash dark:bg-wash-dark text-secondary dark:text-secondary-dark leading-base"><script> (function () { try { let logShown = false; function setUwu(isUwu) { try { if (isUwu) { localStorage.setItem('uwu', true); document.documentElement.classList.add('uwu'); if (!logShown) { console.log('uwu mode! turn off with ?uwu=0'); console.log('logo credit to @sawaratsuki1004 via https://github.com/SAWARATSUKI/ServiceLogos'); logShown = true; } } else { localStorage.removeItem('uwu'); document.documentElement.classList.remove('uwu'); console.log('uwu mode off. turn on with ?uwu'); } } catch (err) { } } window.__setUwu = setUwu; function checkQueryParam() { const params = new URLSearchParams(window.location.search); const value = params.get('uwu'); switch(value) { case '': case 'true': case '1': return true; case 'false': case '0': return false; default: return null; } } function checkLocalStorage() { try { return localStorage.getItem('uwu') === 'true'; } catch (err) { return false; } } const uwuQueryParam = checkQueryParam(); if (uwuQueryParam != null) { setUwu(uwuQueryParam); } else if (checkLocalStorage()) { document.documentElement.classList.add('uwu'); } } catch (err) { } })(); </script><script> (function () { function setTheme(newTheme) { window.__theme = newTheme; if (newTheme === 'dark') { document.documentElement.classList.add('dark'); } else if (newTheme === 'light') { document.documentElement.classList.remove('dark'); } } var preferredTheme; try { preferredTheme = localStorage.getItem('theme'); } catch (err) { } window.__setPreferredTheme = function(newTheme) { preferredTheme = newTheme; setTheme(newTheme); try { localStorage.setItem('theme', newTheme); } catch (err) { } }; var initialTheme = preferredTheme; var darkQuery = window.matchMedia('(prefers-color-scheme: dark)'); if (!initialTheme) { initialTheme = darkQuery.matches ? 'dark' : 'light'; } setTheme(initialTheme); darkQuery.addEventListener('change', function (e) { if (!preferredTheme) { setTheme(e.matches ? 'dark' : 'light'); } }); // Detect whether the browser is Mac to display platform specific content // An example of such content can be the keyboard shortcut displayed in the search bar document.documentElement.classList.add( window.navigator.platform.includes('Mac') ? "platform-mac" : "platform-win" ); })(); </script><link rel="preload" as="image" imageSrcSet="/_next/image?url=%2Fimages%2Fuwu.png&w=64&q=75 1x, /_next/image?url=%2Fimages%2Fuwu.png&w=128&q=75 2x"/><div id="__next"><div></div><div class="z-40 sticky top-0"><nav class="duration-300 backdrop-filter backdrop-blur-lg backdrop-saturate-200 transition-shadow bg-opacity-90 items-center w-full flex justify-between bg-wash dark:bg-wash-dark dark:bg-opacity-95 px-1.5 lg:pe-5 lg:ps-4 z-40"><div class="flex items-center justify-between w-full h-16 gap-0 sm:gap-3"><div class="flex flex-row 3xl:flex-1 items-centers"><button type="button" aria-label="Menu" class="active:scale-95 transition-transform flex lg:hidden w-12 h-12 rounded-full items-center justify-center hover:bg-primary/5 hover:dark:bg-primary-dark/5 outline-link"><svg width="1.33em" height="1.33em" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="3" y1="12" x2="21" y2="12"></line><line x1="3" y1="6" x2="21" y2="6"></line><line x1="3" y1="18" x2="21" y2="18"></line></svg></button><span data-state="closed" class="flex items-center" style="-webkit-touch-callout:none"><div class="flex items-center"><div class="uwu-visible flex items-center justify-center h-full"><a href="/"><img alt="logo by @sawaratsuki1004" title="logo by @sawaratsuki1004" width="63" height="32" decoding="async" data-nimg="1" class="h-8" style="color:transparent" srcSet="/_next/image?url=%2Fimages%2Fuwu.png&w=64&q=75 1x, /_next/image?url=%2Fimages%2Fuwu.png&w=128&q=75 2x" src="/_next/image?url=%2Fimages%2Fuwu.png&w=128&q=75"/></a></div><div class="uwu-hidden"><a class="active:scale-95 overflow-hidden transition-transform relative items-center text-primary dark:text-primary-dark p-1 whitespace-nowrap outline-link rounded-full 3xl:rounded-xl inline-flex text-lg font-normal gap-2" href="/"><svg width="100%" height="100%" viewBox="-10.5 -9.45 21 18.9" fill="none" xmlns="http://www.w3.org/2000/svg" class="text-sm me-0 w-10 h-10 text-brand dark:text-brand-dark flex origin-center transition-all ease-in-out"><circle cx="0" cy="0" r="2" fill="currentColor"></circle><g stroke="currentColor" stroke-width="1" fill="none"><ellipse rx="10" ry="4.5"></ellipse><ellipse rx="10" ry="4.5" transform="rotate(60)"></ellipse><ellipse rx="10" ry="4.5" transform="rotate(120)"></ellipse></g></svg><span class="sr-only 3xl:not-sr-only">React</span></a></div></div></span><div class="flex flex-column justify-center items-center"><a class=" flex py-2 flex-column justify-center items-center text-gray-50 dark:text-gray-30 hover:text-link hover:dark:text-link-dark hover:underline text-sm ms-1 cursor-pointer" href="/versions">v<!-- -->19</a></div></div><div class="items-center justify-center flex-1 hidden w-full md:flex 3xl:w-auto 3xl:shrink-0 3xl:justify-center"><button type="button" class="flex 3xl:w-[56rem] 3xl:mx-0 relative ps-4 pe-1 py-1 h-10 bg-gray-30/20 dark:bg-gray-40/20 outline-none focus:outline-link betterhover:hover:bg-opacity-80 pointer items-center text-start w-full text-gray-30 rounded-full align-middle text-base"><svg width="1em" height="1em" viewBox="0 0 20 20" class="align-middle me-3 text-gray-30 shrink-0 group-betterhover:hover:text-gray-70"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" stroke-width="2" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg>Search<span class="hidden ms-auto sm:flex item-center me-1"><kbd class="w-5 h-5 border border-transparent me-1 bg-wash dark:bg-wash-dark text-gray-30 align-middle p-0 inline-flex justify-center items-center text-xs text-center rounded-md" data-platform="mac">⌘</kbd><kbd class="w-10 h-5 border border-transparent me-1 bg-wash dark:bg-wash-dark text-gray-30 align-middle p-0 inline-flex justify-center items-center text-xs text-center rounded-md" data-platform="win">Ctrl</kbd><kbd class="w-5 h-5 border border-transparent me-1 bg-wash dark:bg-wash-dark text-gray-30 align-middle p-0 inline-flex justify-center items-center text-xs text-center rounded-md">K</kbd></span></button></div><div class="text-base justify-center items-center gap-1.5 flex 3xl:flex-1 flex-row 3xl:justify-end"><div class="mx-2.5 gap-1.5 hidden lg:flex"><div class="flex flex-auto sm:flex-1"><a class="active:scale-95 transition-transform w-full text-center outline-link py-1.5 px-1.5 xs:px-3 sm:px-4 rounded-full capitalize whitespace-nowrap bg-highlight dark:bg-highlight-dark text-link dark:text-link-dark" href="/learn">Learn</a></div><div class="flex flex-auto sm:flex-1"><a class="active:scale-95 transition-transform w-full text-center outline-link py-1.5 px-1.5 xs:px-3 sm:px-4 rounded-full capitalize whitespace-nowrap hover:bg-primary/5 hover:dark:bg-primary-dark/5" href="/reference/react">Reference</a></div><div class="flex flex-auto sm:flex-1"><a class="active:scale-95 transition-transform w-full text-center outline-link py-1.5 px-1.5 xs:px-3 sm:px-4 rounded-full capitalize whitespace-nowrap hover:bg-primary/5 hover:dark:bg-primary-dark/5" href="/community">Community</a></div><div class="flex flex-auto sm:flex-1"><a class="active:scale-95 transition-transform w-full text-center outline-link py-1.5 px-1.5 xs:px-3 sm:px-4 rounded-full capitalize whitespace-nowrap hover:bg-primary/5 hover:dark:bg-primary-dark/5" href="/blog">Blog</a></div></div><div class="flex w-full md:hidden"></div><div class="flex items-center -space-x-2.5 xs:space-x-0 "><div class="flex md:hidden"><button aria-label="Search" type="button" class="flex items-center justify-center w-12 h-12 transition-transform rounded-full active:scale-95 md:hidden hover:bg-secondary-button hover:dark:bg-secondary-button-dark outline-link"><svg width="1em" height="1em" viewBox="0 0 20 20" class="w-5 h-5 align-middle"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" stroke-width="2" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg></button></div><div class="flex dark:hidden"><button type="button" aria-label="Use Dark Mode" class="flex items-center justify-center w-12 h-12 transition-transform rounded-full active:scale-95 hover:bg-primary/5 hover:dark:bg-primary-dark/5 outline-link"><svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" viewBox="0 0 32 32"><g fill="none" fill-rule="evenodd" transform="translate(-440 -200)"><path fill="currentColor" fill-rule="nonzero" stroke="currentColor" stroke-width="0.5" d="M102,21 C102,18.1017141 103.307179,15.4198295 105.51735,13.6246624 C106.001939,13.2310647 105.821611,12.4522936 105.21334,12.3117518 C104.322006,12.1058078 103.414758,12 102.5,12 C95.8722864,12 90.5,17.3722864 90.5,24 C90.5,30.6277136 95.8722864,36 102.5,36 C106.090868,36 109.423902,34.4109093 111.690274,31.7128995 C112.091837,31.2348572 111.767653,30.5041211 111.143759,30.4810139 C106.047479,30.2922628 102,26.1097349 102,21 Z M102.5,34.5 C96.7007136,34.5 92,29.7992864 92,24 C92,18.2007136 96.7007136,13.5 102.5,13.5 C102.807386,13.5 103.113925,13.5136793 103.419249,13.5407785 C101.566047,15.5446378 100.5,18.185162 100.5,21 C100.5,26.3198526 104.287549,30.7714322 109.339814,31.7756638 L109.516565,31.8092927 C107.615276,33.5209452 105.138081,34.5 102.5,34.5 Z" transform="translate(354.5 192)"></path><polygon points="444 228 468 228 468 204 444 204"></polygon></g></svg></button></div><div class="hidden dark:flex"><button type="button" aria-label="Use Light Mode" class="flex items-center justify-center w-12 h-12 transition-transform rounded-full active:scale-95 hover:bg-primary/5 hover:dark:bg-primary-dark/5 outline-link"><svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32"><g fill="none" fill-rule="evenodd" transform="translate(-442 -200)"><g fill="currentColor" transform="translate(356 144)"><path fill-rule="nonzero" d="M108.5 24C108.5 27.5902136 105.590214 30.5 102 30.5 98.4097864 30.5 95.5 27.5902136 95.5 24 95.5 20.4097864 98.4097864 17.5 102 17.5 105.590214 17.5 108.5 20.4097864 108.5 24zM107 24C107 21.2382136 104.761786 19 102 19 99.2382136 19 97 21.2382136 97 24 97 26.7617864 99.2382136 29 102 29 104.761786 29 107 26.7617864 107 24zM101 12.75L101 14.75C101 15.1642136 101.335786 15.5 101.75 15.5 102.164214 15.5 102.5 15.1642136 102.5 14.75L102.5 12.75C102.5 12.3357864 102.164214 12 101.75 12 101.335786 12 101 12.3357864 101 12.75zM95.7255165 14.6323616L96.7485165 16.4038616C96.9556573 16.7625614 97.4143618 16.8854243 97.7730616 16.6782835 98.1317614 16.4711427 98.2546243 16.0124382 98.0474835 15.6537384L97.0244835 13.8822384C96.8173427 13.5235386 96.3586382 13.4006757 95.9999384 13.6078165 95.6412386 13.8149573 95.5183757 14.2736618 95.7255165 14.6323616zM91.8822384 19.0244835L93.6537384 20.0474835C94.0124382 20.2546243 94.4711427 20.1317614 94.6782835 19.7730616 94.8854243 19.4143618 94.7625614 18.9556573 94.4038616 18.7485165L92.6323616 17.7255165C92.2736618 17.5183757 91.8149573 17.6412386 91.6078165 17.9999384 91.4006757 18.3586382 91.5235386 18.8173427 91.8822384 19.0244835zM90.75 25L92.75 25C93.1642136 25 93.5 24.6642136 93.5 24.25 93.5 23.8357864 93.1642136 23.5 92.75 23.5L90.75 23.5C90.3357864 23.5 90 23.8357864 90 24.25 90 24.6642136 90.3357864 25 90.75 25zM92.6323616 30.2744835L94.4038616 29.2514835C94.7625614 29.0443427 94.8854243 28.5856382 94.6782835 28.2269384 94.4711427 27.8682386 94.0124382 27.7453757 93.6537384 27.9525165L91.8822384 28.9755165C91.5235386 29.1826573 91.4006757 29.6413618 91.6078165 30.0000616 91.8149573 30.3587614 92.2736618 30.4816243 92.6323616 30.2744835zM97.0244835 34.1177616L98.0474835 32.3462616C98.2546243 31.9875618 98.1317614 31.5288573 97.7730616 31.3217165 97.4143618 31.1145757 96.9556573 31.2374386 96.7485165 31.5961384L95.7255165 33.3676384C95.5183757 33.7263382 95.6412386 34.1850427 95.9999384 34.3921835 96.3586382 34.5993243 96.8173427 34.4764614 97.0244835 34.1177616zM103 35.25L103 33.25C103 32.8357864 102.664214 32.5 102.25 32.5 101.835786 32.5 101.5 32.8357864 101.5 33.25L101.5 35.25C101.5 35.6642136 101.835786 36 102.25 36 102.664214 36 103 35.6642136 103 35.25zM108.274483 33.3676384L107.251483 31.5961384C107.044343 31.2374386 106.585638 31.1145757 106.226938 31.3217165 105.868239 31.5288573 105.745376 31.9875618 105.952517 32.3462616L106.975517 34.1177616C107.182657 34.4764614 107.641362 34.5993243 108.000062 34.3921835 108.358761 34.1850427 108.481624 33.7263382 108.274483 33.3676384zM112.117762 28.9755165L110.346262 27.9525165C109.987562 27.7453757 109.528857 27.8682386 109.321717 28.2269384 109.114576 28.5856382 109.237439 29.0443427 109.596138 29.2514835L111.367638 30.2744835C111.726338 30.4816243 112.185043 30.3587614 112.392183 30.0000616 112.599324 29.6413618 112.476461 29.1826573 112.117762 28.9755165zM113.25 23L111.25 23C110.835786 23 110.5 23.3357864 110.5 23.75 110.5 24.1642136 110.835786 24.5 111.25 24.5L113.25 24.5C113.664214 24.5 114 24.1642136 114 23.75 114 23.3357864 113.664214 23 113.25 23zM111.367638 17.7255165L109.596138 18.7485165C109.237439 18.9556573 109.114576 19.4143618 109.321717 19.7730616 109.528857 20.1317614 109.987562 20.2546243 110.346262 20.0474835L112.117762 19.0244835C112.476461 18.8173427 112.599324 18.3586382 112.392183 17.9999384 112.185043 17.6412386 111.726338 17.5183757 111.367638 17.7255165zM106.975517 13.8822384L105.952517 15.6537384C105.745376 16.0124382 105.868239 16.4711427 106.226938 16.6782835 106.585638 16.8854243 107.044343 16.7625614 107.251483 16.4038616L108.274483 14.6323616C108.481624 14.2736618 108.358761 13.8149573 108.000062 13.6078165 107.641362 13.4006757 107.182657 13.5235386 106.975517 13.8822384z" transform="translate(0 48)" stroke="currentColor" stroke-width="0.25"></path><path d="M98.6123,60.1372 C98.6123,59.3552 98.8753,58.6427 99.3368,58.0942 C99.5293,57.8657 99.3933,57.5092 99.0943,57.5017 C99.0793,57.5012 99.0633,57.5007 99.0483,57.5007 C97.1578,57.4747 95.5418,59.0312 95.5008,60.9217 C95.4578,62.8907 97.0408,64.5002 98.9998,64.5002 C99.7793,64.5002 100.4983,64.2452 101.0798,63.8142 C101.3183,63.6372 101.2358,63.2627 100.9478,63.1897 C99.5923,62.8457 98.6123,61.6072 98.6123,60.1372" transform="translate(3 11)"></path></g><polygon points="444 228 468 228 468 204 444 204"></polygon></g></svg></button></div><div class="flex"><a class="active:scale-95 transition-transform flex w-12 h-12 rounded-full items-center justify-center hover:bg-primary/5 hover:dark:bg-primary-dark/5 outline-link" aria-label="Translations" href="/community/translations"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="currentColor" d=" M12.87 15.07l-2.54-2.51.03-.03c1.74-1.94 2.98-4.17 3.71-6.53H17V4h-7V2H8v2H1v1.99h11.17C11.5 7.92 10.44 9.75 9 11.35 8.07 10.32 7.3 9.19 6.69 8h-2c.73 1.63 1.73 3.17 2.98 4.56l-5.09 5.02L4 19l5-5 3.11 3.11.76-2.04zM18.5 10h-2L12 22h2l1.12-3h4.75L21 22h2l-4.5-12zm-2.62 7l1.62-4.33L19.12 17h-3.24z "></path></svg></a></div><div class="flex"><a class="flex items-center justify-center w-12 h-12 transition-transform rounded-full active:scale-95 hover:bg-primary/5 hover:dark:bg-primary-dark/5 outline-link" target="_blank" rel="noreferrer noopener" aria-label="Open on GitHub" href="https://github.com/facebook/react/releases"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24"><g fill="currentColor"><path d="M12 0c-6.626 0-12 5.373-12 12 0 5.302 3.438 9.8 8.207 11.387.599.111.793-.261.793-.577v-2.234c-3.338.726-4.033-1.416-4.033-1.416-.546-1.387-1.333-1.756-1.333-1.756-1.089-.745.083-.729.083-.729 1.205.084 1.839 1.237 1.839 1.237 1.07 1.834 2.807 1.304 3.492.997.107-.775.418-1.305.762-1.604-2.665-.305-5.467-1.334-5.467-5.931 0-1.311.469-2.381 1.236-3.221-.124-.303-.535-1.524.117-3.176 0 0 1.008-.322 3.301 1.23.957-.266 1.983-.399 3.003-.404 1.02.005 2.047.138 3.006.404 2.291-1.552 3.297-1.23 3.297-1.23.653 1.653.242 2.874.118 3.176.77.84 1.235 1.911 1.235 3.221 0 4.609-2.807 5.624-5.479 5.921.43.372.823 1.102.823 2.222v3.293c0 .319.192.694.801.576 4.765-1.589 8.199-6.086 8.199-11.386 0-6.627-5.373-12-12-12z"></path></g></svg></a></div></div></div></div></nav></div><div class="grid grid-cols-only-content lg:grid-cols-sidebar-content 2xl:grid-cols-sidebar-content-toc"><div class="lg:-mt-16 z-10"><div class="fixed top-0 py-0 shadow lg:pt-16 lg:sticky start-0 end-0 lg:shadow-none"><div class="sticky top-0 lg:bottom-0 lg:h-[calc(100vh-4rem)] flex flex-col"><div class="overflow-y-scroll no-bg-scrollbar lg:w-[342px] grow bg-wash dark:bg-wash-dark" style="overscroll-behavior:contain"><aside class="lg:grow flex-col w-full pb-8 lg:pb-0 lg:max-w-custom-xs z-10 hidden lg:block"><nav role="navigation" style="--bg-opacity:.2" class="w-full pt-6 scrolling-touch lg:h-auto grow pe-0 lg:pe-5 lg:pb-16 md:pt-4 lg:pt-4 scrolling-gpu"><!--$--><ul><h3 class="mb-1 text-sm font-bold ms-5 text-tertiary dark:text-tertiary-dark">GET STARTED</h3><li><a title="Quick Start" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between ps-5 text-base font-bold text-primary dark:text-primary-dark" href="/learn"><div>Quick Start<!-- --> </div><span class="pe-1 text-tertiary dark:text-tertiary-dark"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" class="duration-100 ease-in transition -rotate-90 rtl:rotate-90" style="min-width:20px;min-height:20px"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></a><div class="opacity-50" style="transition:opacity 250ms ease-in-out"><div id="react-collapsed-panel-:R8im6:" aria-hidden="true" role="region" style="box-sizing:border-box;display:none;height:0px;overflow:hidden"><ul><li><a title="Tutorial: Tic-Tac-Toe" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/tutorial-tic-tac-toe"><div>Tutorial: Tic-Tac-Toe<!-- --> </div></a></li><li><a title="Thinking in React" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/thinking-in-react"><div>Thinking in React<!-- --> </div></a></li></ul></div></div></li><li><a title="Installation" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between ps-5 text-base font-bold text-primary dark:text-primary-dark" href="/learn/installation"><div>Installation<!-- --> </div><span class="pe-1 text-tertiary dark:text-tertiary-dark"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" class="duration-100 ease-in transition -rotate-90 rtl:rotate-90" style="min-width:20px;min-height:20px"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></a><div class="opacity-50" style="transition:opacity 250ms ease-in-out"><div id="react-collapsed-panel-:R8qm6:" aria-hidden="true" role="region" style="box-sizing:border-box;display:none;height:0px;overflow:hidden"><ul><li><a title="Creating a React App" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/creating-a-react-app"><div>Creating a React App<!-- --> </div></a></li><li><a title="Build a React App from Scratch" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/build-a-react-app-from-scratch"><div>Build a React App from Scratch<!-- --> </div></a></li><li><a title="Add React to an Existing Project" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/add-react-to-an-existing-project"><div>Add React to an Existing Project<!-- --> </div></a></li></ul></div></div></li><li><a title="Setup" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between ps-5 text-base font-bold text-primary dark:text-primary-dark" href="/learn/setup"><div>Setup<!-- --> </div><span class="pe-1 text-tertiary dark:text-tertiary-dark"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" class="duration-100 ease-in transition -rotate-90 rtl:rotate-90" style="min-width:20px;min-height:20px"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></a><div class="opacity-50" style="transition:opacity 250ms ease-in-out"><div id="react-collapsed-panel-:R92m6:" aria-hidden="true" role="region" style="box-sizing:border-box;display:none;height:0px;overflow:hidden"><ul><li><a title="Editor Setup" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/editor-setup"><div>Editor Setup<!-- --> </div></a></li><li><a title="Using TypeScript" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/typescript"><div>Using TypeScript<!-- --> </div></a></li><li><a title="React Developer Tools" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/react-developer-tools"><div>React Developer Tools<!-- --> </div></a></li><li><a title="React Compiler" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/react-compiler"><div>React Compiler<!-- --> </div></a></li></ul></div></div></li><li role="separator" class="mt-4 mb-2 ms-5 border-b border-border dark:border-border-dark"></li><h3 class="mb-1 text-sm font-bold ms-5 text-tertiary dark:text-tertiary-dark mt-2">LEARN REACT</h3><li><a title="Describing the UI" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between ps-5 text-base font-bold text-primary dark:text-primary-dark" href="/learn/describing-the-ui"><div>Describing the UI<!-- --> </div><span class="pe-1 text-tertiary dark:text-tertiary-dark"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" class="duration-100 ease-in transition -rotate-90 rtl:rotate-90" style="min-width:20px;min-height:20px"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></a><div class="opacity-50" style="transition:opacity 250ms ease-in-out"><div id="react-collapsed-panel-:R9im6:" aria-hidden="true" role="region" style="box-sizing:border-box;display:none;height:0px;overflow:hidden"><ul><li><a title="Your First Component" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/your-first-component"><div>Your First Component<!-- --> </div></a></li><li><a title="Importing and Exporting Components" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/importing-and-exporting-components"><div>Importing and Exporting Components<!-- --> </div></a></li><li><a title="Writing Markup with JSX" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/writing-markup-with-jsx"><div>Writing Markup with JSX<!-- --> </div></a></li><li><a title="JavaScript in JSX with Curly Braces" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/javascript-in-jsx-with-curly-braces"><div>JavaScript in JSX with Curly Braces<!-- --> </div></a></li><li><a title="Passing Props to a Component" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/passing-props-to-a-component"><div>Passing Props to a Component<!-- --> </div></a></li><li><a title="Conditional Rendering" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/conditional-rendering"><div>Conditional Rendering<!-- --> </div></a></li><li><a title="Rendering Lists" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/rendering-lists"><div>Rendering Lists<!-- --> </div></a></li><li><a title="Keeping Components Pure" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/keeping-components-pure"><div>Keeping Components Pure<!-- --> </div></a></li><li><a title="Your UI as a Tree" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/understanding-your-ui-as-a-tree"><div>Your UI as a Tree<!-- --> </div></a></li></ul></div></div></li><li><a title="Adding Interactivity" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between ps-5 text-base font-bold text-primary dark:text-primary-dark" href="/learn/adding-interactivity"><div>Adding Interactivity<!-- --> </div><span class="pe-1 text-tertiary dark:text-tertiary-dark"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" class="duration-100 ease-in transition -rotate-90 rtl:rotate-90" style="min-width:20px;min-height:20px"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></a><div class="opacity-50" style="transition:opacity 250ms ease-in-out"><div id="react-collapsed-panel-:R9qm6:" aria-hidden="true" role="region" style="box-sizing:border-box;display:none;height:0px;overflow:hidden"><ul><li><a title="Responding to Events" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/responding-to-events"><div>Responding to Events<!-- --> </div></a></li><li><a title="State: A Component's Memory" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/state-a-components-memory"><div>State: A Component's Memory<!-- --> </div></a></li><li><a title="Render and Commit" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/render-and-commit"><div>Render and Commit<!-- --> </div></a></li><li><a title="State as a Snapshot" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/state-as-a-snapshot"><div>State as a Snapshot<!-- --> </div></a></li><li><a title="Queueing a Series of State Updates" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/queueing-a-series-of-state-updates"><div>Queueing a Series of State Updates<!-- --> </div></a></li><li><a title="Updating Objects in State" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/updating-objects-in-state"><div>Updating Objects in State<!-- --> </div></a></li><li><a title="Updating Arrays in State" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/updating-arrays-in-state"><div>Updating Arrays in State<!-- --> </div></a></li></ul></div></div></li><li><a title="Managing State" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between ps-5 text-base font-bold text-primary dark:text-primary-dark" href="/learn/managing-state"><div>Managing State<!-- --> </div><span class="pe-1 text-link dark:text-link-dark"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" class="duration-100 ease-in transition rotate-0" style="min-width:20px;min-height:20px"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></a><div class="opacity-100" style="transition:opacity 250ms ease-in-out"><div id="react-collapsed-panel-:Ra2m6:" aria-hidden="false" role="region" style="box-sizing:border-box"><ul><li><a title="Reacting to Input with State" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/reacting-to-input-with-state"><div>Reacting to Input with State<!-- --> </div></a></li><li><a title="Choosing the State Structure" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/choosing-the-state-structure"><div>Choosing the State Structure<!-- --> </div></a></li><li><a title="Sharing State Between Components" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/sharing-state-between-components"><div>Sharing State Between Components<!-- --> </div></a></li><li><a title="Preserving and Resetting State" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/preserving-and-resetting-state"><div>Preserving and Resetting State<!-- --> </div></a></li><li><a title="Extracting State Logic into a Reducer" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/extracting-state-logic-into-a-reducer"><div>Extracting State Logic into a Reducer<!-- --> </div></a></li><li><a title="Passing Data Deeply with Context" target="" aria-current="page" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-link dark:text-link-dark bg-highlight dark:bg-highlight-dark border-blue-40 hover:bg-highlight hover:text-link dark:hover:bg-highlight-dark dark:hover:text-link-dark" href="/learn/passing-data-deeply-with-context"><div>Passing Data Deeply with Context<!-- --> </div></a></li><li><a title="Scaling Up with Reducer and Context" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/scaling-up-with-reducer-and-context"><div>Scaling Up with Reducer and Context<!-- --> </div></a></li></ul></div></div></li><li><a title="Escape Hatches" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between ps-5 text-base font-bold text-primary dark:text-primary-dark" href="/learn/escape-hatches"><div>Escape Hatches<!-- --> </div><span class="pe-1 text-tertiary dark:text-tertiary-dark"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" class="duration-100 ease-in transition -rotate-90 rtl:rotate-90" style="min-width:20px;min-height:20px"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></a><div class="opacity-50" style="transition:opacity 250ms ease-in-out"><div id="react-collapsed-panel-:Raam6:" aria-hidden="true" role="region" style="box-sizing:border-box;display:none;height:0px;overflow:hidden"><ul><li><a title="Referencing Values with Refs" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/referencing-values-with-refs"><div>Referencing Values with Refs<!-- --> </div></a></li><li><a title="Manipulating the DOM with Refs" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/manipulating-the-dom-with-refs"><div>Manipulating the DOM with Refs<!-- --> </div></a></li><li><a title="Synchronizing with Effects" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/synchronizing-with-effects"><div>Synchronizing with Effects<!-- --> </div></a></li><li><a title="You Might Not Need an Effect" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/you-might-not-need-an-effect"><div>You Might Not Need an Effect<!-- --> </div></a></li><li><a title="Lifecycle of Reactive Effects" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/lifecycle-of-reactive-effects"><div>Lifecycle of Reactive Effects<!-- --> </div></a></li><li><a title="Separating Events from Effects" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/separating-events-from-effects"><div>Separating Events from Effects<!-- --> </div></a></li><li><a title="Removing Effect Dependencies" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/removing-effect-dependencies"><div>Removing Effect Dependencies<!-- --> </div></a></li><li><a title="Reusing Logic with Custom Hooks" target="" class="p-2 pe-2 w-full rounded-none lg:rounded-e-2xl text-start hover:bg-gray-5 dark:hover:bg-gray-80 relative flex items-center justify-between text-sm ps-6 ps-5 text-base text-secondary dark:text-secondary-dark" href="/learn/reusing-logic-with-custom-hooks"><div>Reusing Logic with Custom Hooks<!-- --> </div></a></li></ul></div></div></li></ul><!--/$--><div class="h-20"></div></nav><div class="fixed bottom-0 hidden lg:block"><div class="max-w-custom-xs w-80 lg:w-auto py-3 shadow-lg rounded-lg m-4 bg-wash dark:bg-gray-95 px-4 flex"><p class="w-full text-lg font-bold text-primary dark:text-primary-dark me-4">Is this page useful?</p><button aria-label="Yes" class="px-3 rounded-lg bg-secondary-button dark:bg-secondary-button-dark text-primary dark:text-primary-dark me-2"><svg width="16" height="18" viewBox="0 0 16 18" fill="none" xmlns="http://www.w3.org/2000/svg"><path fill-rule="evenodd" clip-rule="evenodd" d="M9.36603 0.384603C9.36605 0.384617 9.36601 0.384588 9.36603 0.384603L9.45902 0.453415C9.99732 0.851783 10.3873 1.42386 10.5654 2.07648C10.7435 2.72909 10.6993 3.42385 10.44 4.04763L9.27065 6.86008H12.6316C13.5249 6.86008 14.3817 7.22121 15.0134 7.86402C15.6451 8.50683 16 9.37868 16 10.2877V13.7154C16 14.8518 15.5564 15.9416 14.7668 16.7451C13.9771 17.5486 12.9062 18 11.7895 18H5.05263C3.71259 18 2.42743 17.4583 1.47988 16.4941C0.532325 15.5299 0 14.2221 0 12.8585V11.2511C2.40928e-06 9.87711 0.463526 8.54479 1.31308 7.47688L6.66804 0.745592C6.98662 0.345136 7.44414 0.08434 7.94623 0.0171605C8.4483 -0.0500155 8.95656 0.0815891 9.36603 0.384603ZM8.37542 1.77064C8.31492 1.72587 8.23987 1.70646 8.16579 1.71637C8.09171 1.72628 8.02415 1.76477 7.97708 1.82393L2.62213 8.55522C2.0153 9.31801 1.68421 10.2697 1.68421 11.2511V12.8585C1.68421 13.7676 2.03909 14.6394 2.67079 15.2822C3.30249 15.925 4.15927 16.2862 5.05263 16.2862H11.7895C12.4595 16.2862 13.1021 16.0153 13.5759 15.5332C14.0496 15.0511 14.3158 14.3972 14.3158 13.7154V10.2877C14.3158 9.83321 14.1383 9.39729 13.8225 9.07588C13.5066 8.75448 13.0783 8.57392 12.6316 8.57392H8C7.71763 8.57392 7.45405 8.4299 7.29806 8.19039C7.14206 7.95087 7.11442 7.64774 7.22445 7.38311L8.88886 3.37986C9 3.11253 9.01896 2.81477 8.94262 2.53507C8.8663 2.25541 8.69921 2.01027 8.46853 1.83954L8.37542 1.77064Z" fill="currentColor"></path></svg></button><button aria-label="No" class="px-3 rounded-lg bg-secondary-button dark:bg-secondary-button-dark text-primary dark:text-primary-dark"><svg width="16" height="18" viewBox="0 0 16 18" fill="none" xmlns="http://www.w3.org/2000/svg"><path fill-rule="evenodd" clip-rule="evenodd" d="M6.63397 17.6154C6.63395 17.6154 6.63399 17.6154 6.63397 17.6154L6.54098 17.5466C6.00268 17.1482 5.61269 16.5761 5.43458 15.9235C5.25648 15.2709 5.30069 14.5761 5.56004 13.9524L6.72935 11.1399L3.36842 11.1399C2.47506 11.1399 1.61829 10.7788 0.986585 10.136C0.354883 9.49316 8.1991e-07 8.62132 8.99384e-07 7.71225L1.19904e-06 4.28458C1.29838e-06 3.14824 0.443605 2.05844 1.23323 1.25492C2.02286 0.451403 3.09383 -1.12829e-06 4.21053 -1.03067e-06L10.9474 -4.41715e-07C12.2874 -3.24565e-07 13.5726 0.541687 14.5201 1.50591C15.4677 2.47013 16 3.77789 16 5.1415L16 6.74893C16 8.12289 15.5365 9.45521 14.6869 10.5231L9.33196 17.2544C9.01338 17.6549 8.55586 17.9157 8.05377 17.9828C7.5517 18.05 7.04344 17.9184 6.63397 17.6154ZM7.62458 16.2294C7.68508 16.2741 7.76013 16.2935 7.83421 16.2836C7.90829 16.2737 7.97585 16.2352 8.02292 16.1761L13.3779 9.44478C13.9847 8.68199 14.3158 7.73033 14.3158 6.74892L14.3158 5.1415C14.3158 4.23242 13.9609 3.36058 13.3292 2.71777C12.6975 2.07496 11.8407 1.71383 10.9474 1.71383L4.21053 1.71383C3.5405 1.71383 2.89793 1.98468 2.42415 2.46679C1.95038 2.94889 1.68421 3.60277 1.68421 4.28458L1.68421 7.71225C1.68421 8.16679 1.86166 8.60271 2.1775 8.92411C2.49335 9.24552 2.92174 9.42608 3.36842 9.42608L8 9.42608C8.28237 9.42608 8.54595 9.5701 8.70195 9.80961C8.85794 10.0491 8.88558 10.3523 8.77555 10.6169L7.11114 14.6201C7 14.8875 6.98105 15.1852 7.05738 15.4649C7.1337 15.7446 7.30079 15.9897 7.53147 16.1605L7.62458 16.2294Z" fill="currentColor"></path></svg></button></div></div></aside></div></div></div></div><!--$--><main class="min-w-0 isolate"><article class="font-normal break-words text-primary dark:text-primary-dark"><div class="ps-0"><div class=""><div class="px-5 sm:px-12 pt-3.5"><div class="max-w-4xl ms-0 2xl:mx-auto"><div class="flex flex-wrap"><div class="flex mb-3 mt-0.5 items-center"><a class="text-link dark:text-link-dark text-sm tracking-wide font-bold uppercase me-1 hover:underline" href="/learn">Learn React</a><span class="inline-block me-1 text-link dark:text-link-dark text-lg rtl:rotate-180"><svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M6.86612 13.6161C6.37796 14.1043 6.37796 14.8957 6.86612 15.3839C7.35427 15.872 8.14572 15.872 8.63388 15.3839L13.1339 10.8839C13.622 10.3957 13.622 9.60428 13.1339 9.11612L8.63388 4.61612C8.14572 4.12797 7.35427 4.12797 6.86612 4.61612C6.37796 5.10428 6.37796 5.89573 6.86612 6.38388L10.4822 10L6.86612 13.6161Z" fill="currentColor"></path></svg></span></div><div class="flex mb-3 mt-0.5 items-center"><a class="text-link dark:text-link-dark text-sm tracking-wide font-bold uppercase me-1 hover:underline" href="/learn/managing-state">Managing State</a><span class="inline-block me-1 text-link dark:text-link-dark text-lg rtl:rotate-180"><svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M6.86612 13.6161C6.37796 14.1043 6.37796 14.8957 6.86612 15.3839C7.35427 15.872 8.14572 15.872 8.63388 15.3839L13.1339 10.8839C13.622 10.3957 13.622 9.60428 13.1339 9.11612L8.63388 4.61612C8.14572 4.12797 7.35427 4.12797 6.86612 4.61612C6.37796 5.10428 6.37796 5.89573 6.86612 6.38388L10.4822 10L6.86612 13.6161Z" fill="currentColor"></path></svg></span></div></div><h1 class="mdx-heading mt-0 text-primary dark:text-primary-dark -mx-.5 break-words text-5xl font-display font-bold leading-tight">Passing Data Deeply with Context<a href="#undefined" aria-label="Link for this heading" title="Link for this heading" class="mdx-header-anchor hidden"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h1></div></div></div><div class="px-5 sm:px-12"><div class="max-w-7xl mx-auto"><div class="max-w-4xl ms-0 2xl:mx-auto"><div class="font-display text-xl text-primary dark:text-primary-dark leading-relaxed"><p class="whitespace-pre-wrap my-4">Usually, you will pass information from a parent component to a child component via props. But passing props can become verbose and inconvenient if you have to pass them through many components in the middle, or if many components in your app need the same information. <em>Context</em> lets the parent component make some information available to any component in the tree below it—no matter how deep—without passing it explicitly through props.</p></div> <div class="p-6 xl:p-8 pb-4 xl:pb-6 bg-card dark:bg-card-dark rounded-2xl shadow-inner-border dark:shadow-inner-border-dark text-base text-secondary dark:text-secondary-dark my-8"><h3 class="mdx-heading text-primary dark:text-primary-dark mt-0 mb-3 leading-tight text-2xl font-display leading-9 text-primary dark:text-primary-dark font-bold my-6">You will learn</h3><ul class="ms-6 my-3 list-disc"> <li class="leading-relaxed mb-1">What “prop drilling” is</li> <li class="leading-relaxed mb-1">How to replace repetitive prop passing with context</li> <li class="leading-relaxed mb-1">Common use cases for context</li> <li class="leading-relaxed mb-1">Common alternatives to context</li> </ul></div> <h2 id="the-problem-with-passing-props" class="mdx-heading text-3xl font-display leading-10 text-primary dark:text-primary-dark font-bold my-6">The problem with passing props <a href="#the-problem-with-passing-props" aria-label="Link for The problem with passing props " title="Link for The problem with passing props " class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h2> <p class="whitespace-pre-wrap my-4"><a class="inline text-link dark:text-link-dark border-b border-link border-opacity-0 hover:border-opacity-100 duration-100 ease-in transition leading-normal" href="/learn/passing-props-to-a-component">Passing props</a> is a great way to explicitly pipe data through your UI tree to the components that use it.</p> <p class="whitespace-pre-wrap my-4">But passing props can become verbose and inconvenient when you need to pass some prop deeply through the tree, or if many components need the same prop. The nearest common ancestor could be far removed from the components that need data, and <a class="inline text-link dark:text-link-dark border-b border-link border-opacity-0 hover:border-opacity-100 duration-100 ease-in transition leading-normal" href="/learn/sharing-state-between-components">lifting state up</a> that high can lead to a situation called “prop drilling”.</p> <div class="flex flex-col sm:flex-row py-2 sm:p-0 sm:space-y-0 justify-center items-start sm:items-center w-full"><figure class="flex flex-col px-0 p-0 sm:p-10 first:mt-0 mt-10 sm:mt-0 justify-center items-center"><div class="w-full flex justify-center"><figcaption class="p-1 sm:p-2 mt-0 sm:mt-0 text-gray-40 text-base lg:text-lg text-center leading-tight table-caption max-w-lg"><p class="whitespace-pre-wrap my-4">Lifting state up</p></figcaption></div><div class="dark-image"><img alt="Diagram with a tree of three components. The parent contains a bubble representing a value highlighted in purple. The value flows down to each of the two children, both highlighted in purple." loading="lazy" width="608" height="160" decoding="async" data-nimg="1" style="color:transparent" srcSet="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_lifting_state.dark.png&w=640&q=75 1x, /_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_lifting_state.dark.png&w=1920&q=75 2x" src="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_lifting_state.dark.png&w=1920&q=75"/></div><div class="light-image"><img alt="Diagram with a tree of three components. The parent contains a bubble representing a value highlighted in purple. The value flows down to each of the two children, both highlighted in purple." loading="lazy" width="608" height="160" decoding="async" data-nimg="1" style="color:transparent" srcSet="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_lifting_state.png&w=640&q=75 1x, /_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_lifting_state.png&w=1920&q=75 2x" src="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_lifting_state.png&w=1920&q=75"/></div></figure><figure class="flex flex-col px-0 p-0 sm:p-10 first:mt-0 mt-10 sm:mt-0 justify-center items-center"><div class="w-full flex justify-center"><figcaption class="p-1 sm:p-2 mt-0 sm:mt-0 text-gray-40 text-base lg:text-lg text-center leading-tight table-caption max-w-lg"><p class="whitespace-pre-wrap my-4">Prop drilling</p></figcaption></div><div class="dark-image"><img alt="Diagram with a tree of ten nodes, each node with two children or less. The root node contains a bubble representing a value highlighted in purple. The value flows down through the two children, each of which pass the value but do not contain it. The left child passes the value down to two children which are both highlighted purple. The right child of the root passes the value through to one of its two children - the right one, which is highlighted purple. That child passed the value through its single child, which passes it down to both of its two children, which are highlighted purple." loading="lazy" width="608" height="430" decoding="async" data-nimg="1" style="color:transparent" srcSet="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_prop_drilling.dark.png&w=640&q=75 1x, /_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_prop_drilling.dark.png&w=1920&q=75 2x" src="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_prop_drilling.dark.png&w=1920&q=75"/></div><div class="light-image"><img alt="Diagram with a tree of ten nodes, each node with two children or less. The root node contains a bubble representing a value highlighted in purple. The value flows down through the two children, each of which pass the value but do not contain it. The left child passes the value down to two children which are both highlighted purple. The right child of the root passes the value through to one of its two children - the right one, which is highlighted purple. That child passed the value through its single child, which passes it down to both of its two children, which are highlighted purple." loading="lazy" width="608" height="430" decoding="async" data-nimg="1" style="color:transparent" srcSet="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_prop_drilling.png&w=640&q=75 1x, /_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_prop_drilling.png&w=1920&q=75 2x" src="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_prop_drilling.png&w=1920&q=75"/></div></figure></div> <p class="whitespace-pre-wrap my-4">Wouldn’t it be great if there were a way to “teleport” data to the components in the tree that need it without passing props? With React’s context feature, there is!</p> <h2 id="context-an-alternative-to-passing-props" class="mdx-heading text-3xl font-display leading-10 text-primary dark:text-primary-dark font-bold my-6">Context: an alternative to passing props <a href="#context-an-alternative-to-passing-props" aria-label="Link for Context: an alternative to passing props " title="Link for Context: an alternative to passing props " class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h2> <p class="whitespace-pre-wrap my-4">Context lets a parent component provide data to the entire tree below it. There are many uses for context. Here is one example. Consider this <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Heading</code> component that accepts a <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> for its size:</p> </div><!--$--><div class="sandpack sandpack--playground w-full my-8" dir="ltr"><div class="sp-wrapper"><div class="shadow-lg dark:shadow-lg-dark rounded-lg" style="contain:content"><div class="bg-wash dark:bg-card-dark flex justify-between items-center relative z-10 border-b border-border dark:border-border-dark rounded-t-lg text-lg"><div class="flex-1 grow min-w-0 px-4 lg:px-6"><div><div class="relative overflow-hidden"><div class="w-[fit-content] invisible"><div class=" sp-tabs" translate="no"><div aria-label="Select active file" class=" sp-tabs-scrollable-container" role="tablist"><button aria-selected="true" class=" sp-tab-button" data-active="true" role="tab" title="/src/App.js" type="button">App.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Section.js" type="button">Section.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Heading.js" type="button">Heading.js</button></div></div></div><button class="absolute top-0 start-[2px]" id="headlessui-listbox-button-:Rj52cq6:" aria-haspopup="true" aria-expanded="false" data-headlessui-state=""><span class="h-full py-2 px-1 mt-px -mb-px flex border-b text-link dark:text-link-dark border-link dark:border-link-dark items-center text-md leading-tight truncate" style="max-width:160px">App.js<span class="ms-2"><svg class="rotate-0" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></span></button></div></div></div><div class="px-3 flex items-center justify-end text-start" translate="yes"><button class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1" title="Reset Sandbox" type="button"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative"><path d="M13.8982 5.20844C12.4626 4.88688 10.9686 4.93769 9.55821 5.35604L11.8524 3.06184C11.8989 3.0154 11.9357 2.96028 11.9608 2.89961C11.986 2.83894 11.9989 2.77391 11.9989 2.70824C11.9989 2.64256 11.986 2.57754 11.9608 2.51686C11.9357 2.45619 11.8989 2.40107 11.8524 2.35464L11.1456 1.64784C11.0992 1.60139 11.0441 1.56455 10.9834 1.53942C10.9227 1.51428 10.8577 1.50134 10.792 1.50134C10.7263 1.50134 10.6613 1.51428 10.6006 1.53942C10.54 1.56455 10.4848 1.60139 10.4384 1.64784L6.14571 5.94054C6.00654 6.07969 5.89615 6.2449 5.82083 6.42673C5.74551 6.60855 5.70675 6.80343 5.70675 7.00024C5.70675 7.19704 5.74551 7.39192 5.82083 7.57374C5.89615 7.75557 6.00654 7.92078 6.14571 8.05994L10.4387 12.3529C10.5325 12.4465 10.6595 12.4991 10.792 12.4991C10.9245 12.4991 11.0516 12.4465 11.1453 12.3529L11.8527 11.6455C11.9463 11.5518 11.9989 11.4247 11.9989 11.2922C11.9989 11.1598 11.9463 11.0327 11.8527 10.9389L8.77481 7.86104C9.99795 7.16236 11.415 6.8801 12.8125 7.05678C14.21 7.23347 15.5122 7.85953 16.523 8.84064C17.5338 9.82176 18.1983 11.1048 18.4165 12.4964C18.6347 13.888 18.3947 15.3129 17.7328 16.5562C17.0708 17.7996 16.0227 18.7942 14.7463 19.3902C13.47 19.9861 12.0345 20.1511 10.6563 19.8603C9.27798 19.5695 8.03152 18.8387 7.10469 17.778C6.17786 16.7172 5.62086 15.384 5.51761 13.9791C5.51156 13.8512 5.45689 13.7303 5.36477 13.6413C5.27265 13.5522 5.15001 13.5017 5.02191 13.5H4.02081C3.95297 13.4996 3.88574 13.5129 3.8232 13.5392C3.76065 13.5655 3.70408 13.6042 3.6569 13.6529C3.60972 13.7017 3.57291 13.7595 3.54869 13.8228C3.52448 13.8862 3.51336 13.9538 3.51601 14.0216C3.61349 15.5965 4.1473 17.1132 5.0577 18.4019C5.9681 19.6906 7.21917 20.7006 8.6709 21.3188C10.1226 21.937 11.7178 22.139 13.2778 21.9022C14.8378 21.6654 16.3011 20.9992 17.504 19.978C18.7069 18.9569 19.6019 17.6212 20.0889 16.1203C20.5759 14.6195 20.6356 13.0128 20.2614 11.4799C19.8872 9.94705 19.0938 8.54858 17.97 7.44098C16.8462 6.33339 15.4363 5.56037 13.8982 5.20844V5.20844Z" fill="currentColor"></path></svg> Reset</button><a href="https://codesandbox.io/api/v1/sandboxes/define?undefined&environment=create-react-app" rel="noreferrer noopener" target="_blank" title="Open in CodeSandbox" class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1 ms-2 md:ms-1"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative top-[1px]"><path d="M20.5001 2H15.5001C15.3675 2 15.2403 2.05268 15.1465 2.14645C15.0528 2.24021 15.0001 2.36739 15.0001 2.5V3.5C15.0001 3.63261 15.0528 3.75979 15.1465 3.85355C15.2403 3.94732 15.3675 4 15.5001 4H18.5901L7.6501 14.94C7.60323 14.9865 7.56604 15.0418 7.54065 15.1027C7.51527 15.1636 7.5022 15.229 7.5022 15.295C7.5022 15.361 7.51527 15.4264 7.54065 15.4873C7.56604 15.5482 7.60323 15.6035 7.6501 15.65L8.3501 16.35C8.39658 16.3969 8.45188 16.4341 8.51281 16.4594C8.57374 16.4848 8.63909 16.4979 8.7051 16.4979C8.7711 16.4979 8.83646 16.4848 8.89738 16.4594C8.95831 16.4341 9.01362 16.3969 9.0601 16.35L20.0001 5.41V8.5C20.0001 8.63261 20.0528 8.75979 20.1465 8.85355C20.2403 8.94732 20.3675 9 20.5001 9H21.5001C21.6327 9 21.7599 8.94732 21.8537 8.85355C21.9474 8.75979 22.0001 8.63261 22.0001 8.5V3.5C22.0001 3.10218 21.8421 2.72064 21.5608 2.43934C21.2795 2.15804 20.8979 2 20.5001 2V2Z" fill="currentColor"></path><path d="M21.5 13H20.5C20.3674 13 20.2402 13.0527 20.1464 13.1464C20.0527 13.2402 20 13.3674 20 13.5V20H4V4H10.5C10.6326 4 10.7598 3.94732 10.8536 3.85355C10.9473 3.75979 11 3.63261 11 3.5V2.5C11 2.36739 10.9473 2.24021 10.8536 2.14645C10.7598 2.05268 10.6326 2 10.5 2H3.5C3.10218 2 2.72064 2.15804 2.43934 2.43934C2.15804 2.72064 2 3.10218 2 3.5V20.5C2 20.8978 2.15804 21.2794 2.43934 21.5607C2.72064 21.842 3.10218 22 3.5 22H20.5C20.8978 22 21.2794 21.842 21.5607 21.5607C21.842 21.2794 22 20.8978 22 20.5V13.5C22 13.3674 21.9473 13.2402 21.8536 13.1464C21.7598 13.0527 21.6326 13 21.5 13Z" fill="currentColor"></path></svg><span class="hidden md:block">Fork</span></a></div></div><div class=" rounded-b-lg overflow-hidden sp-layout"><div class=" sp-editor sp-stack"><div class=" sp-code-editor"><div aria-autocomplete="list" aria-label="Code Editor for App.js" aria-multiline="true" class="sp-pristine sp-javascript sp-cm" role="textbox" tabindex="0" translate="no"><pre class=" sp-pre-placeholder" style="margin-left:var(--sp-space-11)"><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Heading</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Heading.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Section</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Section.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Page</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">1</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Title<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">2</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">5</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">6</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-sub-sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> </pre></div></div></div><div class=" order-last xl:order-2 sp-stack"><div class="p-0 sm:p-2 md:p-4 lg:p-8 bg-card dark:bg-wash-dark h-full relative md:rounded-b-lg lg:rounded-b-none"><div style="position:relative"><iframe class="rounded-t-none bg-white md:shadow-md sm:rounded-lg w-full max-w-full transition-opacity absolute opacity-0 pointer-events-none duration-75" title="Sandbox Preview" style="height:15px;z-index:-1"></iframe></div></div></div></div></div></div></div><!--/$--><div class="max-w-4xl ms-0 2xl:mx-auto"> <p class="whitespace-pre-wrap my-4">Let’s say you want multiple headings within the same <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> to always have the same size:</p> </div><!--$--><div class="sandpack sandpack--playground w-full my-8" dir="ltr"><div class="sp-wrapper"><div class="shadow-lg dark:shadow-lg-dark rounded-lg" style="contain:content"><div class="bg-wash dark:bg-card-dark flex justify-between items-center relative z-10 border-b border-border dark:border-border-dark rounded-t-lg text-lg"><div class="flex-1 grow min-w-0 px-4 lg:px-6"><div><div class="relative overflow-hidden"><div class="w-[fit-content] invisible"><div class=" sp-tabs" translate="no"><div aria-label="Select active file" class=" sp-tabs-scrollable-container" role="tablist"><button aria-selected="true" class=" sp-tab-button" data-active="true" role="tab" title="/src/App.js" type="button">App.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Section.js" type="button">Section.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Heading.js" type="button">Heading.js</button></div></div></div><button class="absolute top-0 start-[2px]" id="headlessui-listbox-button-:Rj54cq6:" aria-haspopup="true" aria-expanded="false" data-headlessui-state=""><span class="h-full py-2 px-1 mt-px -mb-px flex border-b text-link dark:text-link-dark border-link dark:border-link-dark items-center text-md leading-tight truncate" style="max-width:160px">App.js<span class="ms-2"><svg class="rotate-0" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></span></button></div></div></div><div class="px-3 flex items-center justify-end text-start" translate="yes"><button class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1" title="Reset Sandbox" type="button"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative"><path d="M13.8982 5.20844C12.4626 4.88688 10.9686 4.93769 9.55821 5.35604L11.8524 3.06184C11.8989 3.0154 11.9357 2.96028 11.9608 2.89961C11.986 2.83894 11.9989 2.77391 11.9989 2.70824C11.9989 2.64256 11.986 2.57754 11.9608 2.51686C11.9357 2.45619 11.8989 2.40107 11.8524 2.35464L11.1456 1.64784C11.0992 1.60139 11.0441 1.56455 10.9834 1.53942C10.9227 1.51428 10.8577 1.50134 10.792 1.50134C10.7263 1.50134 10.6613 1.51428 10.6006 1.53942C10.54 1.56455 10.4848 1.60139 10.4384 1.64784L6.14571 5.94054C6.00654 6.07969 5.89615 6.2449 5.82083 6.42673C5.74551 6.60855 5.70675 6.80343 5.70675 7.00024C5.70675 7.19704 5.74551 7.39192 5.82083 7.57374C5.89615 7.75557 6.00654 7.92078 6.14571 8.05994L10.4387 12.3529C10.5325 12.4465 10.6595 12.4991 10.792 12.4991C10.9245 12.4991 11.0516 12.4465 11.1453 12.3529L11.8527 11.6455C11.9463 11.5518 11.9989 11.4247 11.9989 11.2922C11.9989 11.1598 11.9463 11.0327 11.8527 10.9389L8.77481 7.86104C9.99795 7.16236 11.415 6.8801 12.8125 7.05678C14.21 7.23347 15.5122 7.85953 16.523 8.84064C17.5338 9.82176 18.1983 11.1048 18.4165 12.4964C18.6347 13.888 18.3947 15.3129 17.7328 16.5562C17.0708 17.7996 16.0227 18.7942 14.7463 19.3902C13.47 19.9861 12.0345 20.1511 10.6563 19.8603C9.27798 19.5695 8.03152 18.8387 7.10469 17.778C6.17786 16.7172 5.62086 15.384 5.51761 13.9791C5.51156 13.8512 5.45689 13.7303 5.36477 13.6413C5.27265 13.5522 5.15001 13.5017 5.02191 13.5H4.02081C3.95297 13.4996 3.88574 13.5129 3.8232 13.5392C3.76065 13.5655 3.70408 13.6042 3.6569 13.6529C3.60972 13.7017 3.57291 13.7595 3.54869 13.8228C3.52448 13.8862 3.51336 13.9538 3.51601 14.0216C3.61349 15.5965 4.1473 17.1132 5.0577 18.4019C5.9681 19.6906 7.21917 20.7006 8.6709 21.3188C10.1226 21.937 11.7178 22.139 13.2778 21.9022C14.8378 21.6654 16.3011 20.9992 17.504 19.978C18.7069 18.9569 19.6019 17.6212 20.0889 16.1203C20.5759 14.6195 20.6356 13.0128 20.2614 11.4799C19.8872 9.94705 19.0938 8.54858 17.97 7.44098C16.8462 6.33339 15.4363 5.56037 13.8982 5.20844V5.20844Z" fill="currentColor"></path></svg> Reset</button><a href="https://codesandbox.io/api/v1/sandboxes/define?undefined&environment=create-react-app" rel="noreferrer noopener" target="_blank" title="Open in CodeSandbox" class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1 ms-2 md:ms-1"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative top-[1px]"><path d="M20.5001 2H15.5001C15.3675 2 15.2403 2.05268 15.1465 2.14645C15.0528 2.24021 15.0001 2.36739 15.0001 2.5V3.5C15.0001 3.63261 15.0528 3.75979 15.1465 3.85355C15.2403 3.94732 15.3675 4 15.5001 4H18.5901L7.6501 14.94C7.60323 14.9865 7.56604 15.0418 7.54065 15.1027C7.51527 15.1636 7.5022 15.229 7.5022 15.295C7.5022 15.361 7.51527 15.4264 7.54065 15.4873C7.56604 15.5482 7.60323 15.6035 7.6501 15.65L8.3501 16.35C8.39658 16.3969 8.45188 16.4341 8.51281 16.4594C8.57374 16.4848 8.63909 16.4979 8.7051 16.4979C8.7711 16.4979 8.83646 16.4848 8.89738 16.4594C8.95831 16.4341 9.01362 16.3969 9.0601 16.35L20.0001 5.41V8.5C20.0001 8.63261 20.0528 8.75979 20.1465 8.85355C20.2403 8.94732 20.3675 9 20.5001 9H21.5001C21.6327 9 21.7599 8.94732 21.8537 8.85355C21.9474 8.75979 22.0001 8.63261 22.0001 8.5V3.5C22.0001 3.10218 21.8421 2.72064 21.5608 2.43934C21.2795 2.15804 20.8979 2 20.5001 2V2Z" fill="currentColor"></path><path d="M21.5 13H20.5C20.3674 13 20.2402 13.0527 20.1464 13.1464C20.0527 13.2402 20 13.3674 20 13.5V20H4V4H10.5C10.6326 4 10.7598 3.94732 10.8536 3.85355C10.9473 3.75979 11 3.63261 11 3.5V2.5C11 2.36739 10.9473 2.24021 10.8536 2.14645C10.7598 2.05268 10.6326 2 10.5 2H3.5C3.10218 2 2.72064 2.15804 2.43934 2.43934C2.15804 2.72064 2 3.10218 2 3.5V20.5C2 20.8978 2.15804 21.2794 2.43934 21.5607C2.72064 21.842 3.10218 22 3.5 22H20.5C20.8978 22 21.2794 21.842 21.5607 21.5607C21.842 21.2794 22 20.8978 22 20.5V13.5C22 13.3674 21.9473 13.2402 21.8536 13.1464C21.7598 13.0527 21.6326 13 21.5 13Z" fill="currentColor"></path></svg><span class="hidden md:block">Fork</span></a></div></div><div class=" sp-layout"><div class=" sp-editor sp-stack"><div class=" sp-code-editor"><div aria-autocomplete="list" aria-label="Code Editor for App.js" aria-multiline="true" class="sp-pristine sp-javascript sp-cm" role="textbox" tabindex="0" translate="no"><pre class=" sp-pre-placeholder" style="margin-left:var(--sp-space-11)"><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Heading</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Heading.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Section</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Section.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Page</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">1</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Title<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">2</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">2</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">2</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> </pre></div></div></div><div class=" order-last xl:order-2 sp-stack"><div class="p-0 sm:p-2 md:p-4 lg:p-8 bg-card dark:bg-wash-dark h-full relative md:rounded-b-lg lg:rounded-b-none"><div style="position:relative"><iframe class="rounded-t-none bg-white md:shadow-md sm:rounded-lg w-full max-w-full transition-opacity absolute opacity-0 pointer-events-none duration-75" title="Sandbox Preview" style="height:15px;z-index:-1"></iframe></div></div></div><button translate="yes" class="sandpack-expand flex text-base justify-between dark:border-card-dark bg-wash dark:bg-card-dark items-center z-10 p-1 w-full order-2 xl:order-last border-b-1 relative top-0"><span class="flex p-2 focus:outline-none text-primary dark:text-primary-dark leading-[20px]"><svg class="rotate-0 inline me-1.5 text-xl" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg>Show more</span></button></div></div></div></div><!--/$--><div class="max-w-4xl ms-0 2xl:mx-auto"> <p class="whitespace-pre-wrap my-4">Currently, you pass the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> prop to each <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Heading></code> separately:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>About<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Photos<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Videos<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "><span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4">It would be nice if you could pass the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> prop to the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Section></code> component instead and remove it from the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Heading></code>. This way you could enforce that all headings in the same section have the same size:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>About<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Photos<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Videos<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "><span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4">But how can the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Heading></code> component know the level of its closest <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Section></code>? <strong class="font-bold">That would require some way for a child to “ask” for data from somewhere above in the tree.</strong></p> <p class="whitespace-pre-wrap my-4">You can’t do it with props alone. This is where context comes into play. You will do it in three steps:</p> <ol class="ms-6 my-3 list-decimal"> <li class="leading-relaxed mb-1"><strong class="font-bold">Create</strong> a context. (You can call it <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code>, since it’s for the heading level.)</li> <li class="leading-relaxed mb-1"><strong class="font-bold">Use</strong> that context from the component that needs the data. (<code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Heading</code> will use <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code>.)</li> <li class="leading-relaxed mb-1"><strong class="font-bold">Provide</strong> that context from the component that specifies the data. (<code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> will provide <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code>.)</li> </ol> <p class="whitespace-pre-wrap my-4">Context lets a parent—even a distant one!—provide some data to the entire tree inside of it.</p> <div class="flex flex-col sm:flex-row py-2 sm:p-0 sm:space-y-0 justify-center items-start sm:items-center w-full"><figure class="flex flex-col px-0 p-0 sm:p-10 first:mt-0 mt-10 sm:mt-0 justify-center items-center"><div class="w-full flex justify-center"><figcaption class="p-1 sm:p-2 mt-0 sm:mt-0 text-gray-40 text-base lg:text-lg text-center leading-tight table-caption max-w-lg"><p class="whitespace-pre-wrap my-4">Using context in close children</p></figcaption></div><div class="dark-image"><img alt="Diagram with a tree of three components. The parent contains a bubble representing a value highlighted in orange which projects down to the two children, each highlighted in orange." loading="lazy" width="608" height="160" decoding="async" data-nimg="1" style="color:transparent" srcSet="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_close.dark.png&w=640&q=75 1x, /_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_close.dark.png&w=1920&q=75 2x" src="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_close.dark.png&w=1920&q=75"/></div><div class="light-image"><img alt="Diagram with a tree of three components. The parent contains a bubble representing a value highlighted in orange which projects down to the two children, each highlighted in orange." loading="lazy" width="608" height="160" decoding="async" data-nimg="1" style="color:transparent" srcSet="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_close.png&w=640&q=75 1x, /_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_close.png&w=1920&q=75 2x" src="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_close.png&w=1920&q=75"/></div></figure><figure class="flex flex-col px-0 p-0 sm:p-10 first:mt-0 mt-10 sm:mt-0 justify-center items-center"><div class="w-full flex justify-center"><figcaption class="p-1 sm:p-2 mt-0 sm:mt-0 text-gray-40 text-base lg:text-lg text-center leading-tight table-caption max-w-lg"><p class="whitespace-pre-wrap my-4">Using context in distant children</p></figcaption></div><div class="dark-image"><img alt="Diagram with a tree of ten nodes, each node with two children or less. The root parent node contains a bubble representing a value highlighted in orange. The value projects down directly to four leaves and one intermediate component in the tree, which are all highlighted in orange. None of the other intermediate components are highlighted." loading="lazy" width="608" height="430" decoding="async" data-nimg="1" style="color:transparent" srcSet="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_far.dark.png&w=640&q=75 1x, /_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_far.dark.png&w=1920&q=75 2x" src="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_far.dark.png&w=1920&q=75"/></div><div class="light-image"><img alt="Diagram with a tree of ten nodes, each node with two children or less. The root parent node contains a bubble representing a value highlighted in orange. The value projects down directly to four leaves and one intermediate component in the tree, which are all highlighted in orange. None of the other intermediate components are highlighted." loading="lazy" width="608" height="430" decoding="async" data-nimg="1" style="color:transparent" srcSet="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_far.png&w=640&q=75 1x, /_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_far.png&w=1920&q=75 2x" src="/_next/image?url=%2Fimages%2Fdocs%2Fdiagrams%2Fpassing_data_context_far.png&w=1920&q=75"/></div></figure></div> <h3 id="step-1-create-the-context" class="mdx-heading text-2xl font-display leading-9 text-primary dark:text-primary-dark font-bold my-6">Step 1: Create the context <a href="#step-1-create-the-context" aria-label="Link for Step 1: Create the context " title="Link for Step 1: Create the context " class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h3> <p class="whitespace-pre-wrap my-4">First, you need to create the context. You’ll need to <strong class="font-bold">export it from a file</strong> so that your components can use it:</p> </div><!--$--><div class="sandpack sandpack--playground w-full my-8" dir="ltr"><div class="sp-wrapper"><div class="shadow-lg dark:shadow-lg-dark rounded-lg" style="contain:content"><div class="bg-wash dark:bg-card-dark flex justify-between items-center relative z-10 border-b border-border dark:border-border-dark rounded-t-lg text-lg"><div class="flex-1 grow min-w-0 px-4 lg:px-6"><div><div class="relative overflow-hidden"><div class="w-[fit-content] invisible"><div class=" sp-tabs" translate="no"><div aria-label="Select active file" class=" sp-tabs-scrollable-container" role="tablist"><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/App.js" type="button">App.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Section.js" type="button">Section.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Heading.js" type="button">Heading.js</button><button aria-selected="true" class=" sp-tab-button" data-active="true" role="tab" title="/src/LevelContext.js" type="button">LevelContext.js</button></div></div></div><button class="absolute top-0 start-[2px]" id="headlessui-listbox-button-:Rj56cq6:" aria-haspopup="true" aria-expanded="false" data-headlessui-state=""><span class="h-full py-2 px-1 mt-px -mb-px flex border-b text-link dark:text-link-dark border-link dark:border-link-dark items-center text-md leading-tight truncate" style="max-width:160px">LevelContext.js<span class="ms-2"><svg class="rotate-0" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></span></button></div></div></div><div class="px-3 flex items-center justify-end text-start" translate="yes"><button class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1" title="Reset Sandbox" type="button"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative"><path d="M13.8982 5.20844C12.4626 4.88688 10.9686 4.93769 9.55821 5.35604L11.8524 3.06184C11.8989 3.0154 11.9357 2.96028 11.9608 2.89961C11.986 2.83894 11.9989 2.77391 11.9989 2.70824C11.9989 2.64256 11.986 2.57754 11.9608 2.51686C11.9357 2.45619 11.8989 2.40107 11.8524 2.35464L11.1456 1.64784C11.0992 1.60139 11.0441 1.56455 10.9834 1.53942C10.9227 1.51428 10.8577 1.50134 10.792 1.50134C10.7263 1.50134 10.6613 1.51428 10.6006 1.53942C10.54 1.56455 10.4848 1.60139 10.4384 1.64784L6.14571 5.94054C6.00654 6.07969 5.89615 6.2449 5.82083 6.42673C5.74551 6.60855 5.70675 6.80343 5.70675 7.00024C5.70675 7.19704 5.74551 7.39192 5.82083 7.57374C5.89615 7.75557 6.00654 7.92078 6.14571 8.05994L10.4387 12.3529C10.5325 12.4465 10.6595 12.4991 10.792 12.4991C10.9245 12.4991 11.0516 12.4465 11.1453 12.3529L11.8527 11.6455C11.9463 11.5518 11.9989 11.4247 11.9989 11.2922C11.9989 11.1598 11.9463 11.0327 11.8527 10.9389L8.77481 7.86104C9.99795 7.16236 11.415 6.8801 12.8125 7.05678C14.21 7.23347 15.5122 7.85953 16.523 8.84064C17.5338 9.82176 18.1983 11.1048 18.4165 12.4964C18.6347 13.888 18.3947 15.3129 17.7328 16.5562C17.0708 17.7996 16.0227 18.7942 14.7463 19.3902C13.47 19.9861 12.0345 20.1511 10.6563 19.8603C9.27798 19.5695 8.03152 18.8387 7.10469 17.778C6.17786 16.7172 5.62086 15.384 5.51761 13.9791C5.51156 13.8512 5.45689 13.7303 5.36477 13.6413C5.27265 13.5522 5.15001 13.5017 5.02191 13.5H4.02081C3.95297 13.4996 3.88574 13.5129 3.8232 13.5392C3.76065 13.5655 3.70408 13.6042 3.6569 13.6529C3.60972 13.7017 3.57291 13.7595 3.54869 13.8228C3.52448 13.8862 3.51336 13.9538 3.51601 14.0216C3.61349 15.5965 4.1473 17.1132 5.0577 18.4019C5.9681 19.6906 7.21917 20.7006 8.6709 21.3188C10.1226 21.937 11.7178 22.139 13.2778 21.9022C14.8378 21.6654 16.3011 20.9992 17.504 19.978C18.7069 18.9569 19.6019 17.6212 20.0889 16.1203C20.5759 14.6195 20.6356 13.0128 20.2614 11.4799C19.8872 9.94705 19.0938 8.54858 17.97 7.44098C16.8462 6.33339 15.4363 5.56037 13.8982 5.20844V5.20844Z" fill="currentColor"></path></svg> Reset</button><a href="https://codesandbox.io/api/v1/sandboxes/define?undefined&environment=create-react-app" rel="noreferrer noopener" target="_blank" title="Open in CodeSandbox" class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1 ms-2 md:ms-1"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative top-[1px]"><path d="M20.5001 2H15.5001C15.3675 2 15.2403 2.05268 15.1465 2.14645C15.0528 2.24021 15.0001 2.36739 15.0001 2.5V3.5C15.0001 3.63261 15.0528 3.75979 15.1465 3.85355C15.2403 3.94732 15.3675 4 15.5001 4H18.5901L7.6501 14.94C7.60323 14.9865 7.56604 15.0418 7.54065 15.1027C7.51527 15.1636 7.5022 15.229 7.5022 15.295C7.5022 15.361 7.51527 15.4264 7.54065 15.4873C7.56604 15.5482 7.60323 15.6035 7.6501 15.65L8.3501 16.35C8.39658 16.3969 8.45188 16.4341 8.51281 16.4594C8.57374 16.4848 8.63909 16.4979 8.7051 16.4979C8.7711 16.4979 8.83646 16.4848 8.89738 16.4594C8.95831 16.4341 9.01362 16.3969 9.0601 16.35L20.0001 5.41V8.5C20.0001 8.63261 20.0528 8.75979 20.1465 8.85355C20.2403 8.94732 20.3675 9 20.5001 9H21.5001C21.6327 9 21.7599 8.94732 21.8537 8.85355C21.9474 8.75979 22.0001 8.63261 22.0001 8.5V3.5C22.0001 3.10218 21.8421 2.72064 21.5608 2.43934C21.2795 2.15804 20.8979 2 20.5001 2V2Z" fill="currentColor"></path><path d="M21.5 13H20.5C20.3674 13 20.2402 13.0527 20.1464 13.1464C20.0527 13.2402 20 13.3674 20 13.5V20H4V4H10.5C10.6326 4 10.7598 3.94732 10.8536 3.85355C10.9473 3.75979 11 3.63261 11 3.5V2.5C11 2.36739 10.9473 2.24021 10.8536 2.14645C10.7598 2.05268 10.6326 2 10.5 2H3.5C3.10218 2 2.72064 2.15804 2.43934 2.43934C2.15804 2.72064 2 3.10218 2 3.5V20.5C2 20.8978 2.15804 21.2794 2.43934 21.5607C2.72064 21.842 3.10218 22 3.5 22H20.5C20.8978 22 21.2794 21.842 21.5607 21.5607C21.842 21.2794 22 20.8978 22 20.5V13.5C22 13.3674 21.9473 13.2402 21.8536 13.1464C21.7598 13.0527 21.6326 13 21.5 13Z" fill="currentColor"></path></svg><span class="hidden md:block">Fork</span></a></div></div><div class=" rounded-b-lg overflow-hidden sp-layout"><div class=" sp-editor sp-stack"><div class=" sp-code-editor"><div aria-autocomplete="list" aria-label="Code Editor for LevelContext.js" aria-multiline="true" class="sp-pristine sp-javascript sp-cm" role="textbox" tabindex="0" translate="no"><pre class=" sp-pre-placeholder" style="margin-left:var(--sp-space-11)"><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-plain">createContext</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'react'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">const</span> <span class="sp-syntax-plain">LevelContext</span> = <span class="sp-syntax-definition">createContext</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-static">1</span><span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> </pre></div></div></div><div class=" order-last xl:order-2 sp-stack"><div class="p-0 sm:p-2 md:p-4 lg:p-8 bg-card dark:bg-wash-dark h-full relative md:rounded-b-lg lg:rounded-b-none"><div style="position:relative"><iframe class="rounded-t-none bg-white md:shadow-md sm:rounded-lg w-full max-w-full transition-opacity absolute opacity-0 pointer-events-none duration-75" title="Sandbox Preview" style="height:15px;z-index:-1"></iframe></div></div></div></div></div></div></div><!--/$--><div class="max-w-4xl ms-0 2xl:mx-auto"> <p class="whitespace-pre-wrap my-4">The only argument to <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">createContext</code> is the <em>default</em> value. Here, <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">1</code> refers to the biggest heading level, but you could pass any kind of value (even an object). You will see the significance of the default value in the next step.</p> <h3 id="step-2-use-the-context" class="mdx-heading text-2xl font-display leading-9 text-primary dark:text-primary-dark font-bold my-6">Step 2: Use the context <a href="#step-2-use-the-context" aria-label="Link for Step 2: Use the context " title="Link for Step 2: Use the context " class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h3> <p class="whitespace-pre-wrap my-4">Import the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">useContext</code> Hook from React and your context:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-plain">useContext</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'react'</span><span class="sp-syntax-punctuation">;</span><br/></div><div class="cm-line "><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-plain">LevelContext</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./LevelContext.js'</span><span class="sp-syntax-punctuation">;</span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4">Currently, the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Heading</code> component reads <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> from props:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-property">level</span><span class="sp-syntax-punctuation">,</span> <span class="sp-syntax-property">children</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span><br/></div><div class="cm-line "> <span class="sp-syntax-comment">// ...</span><br/></div><div class="cm-line "><span class="sp-syntax-punctuation">}</span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4">Instead, remove the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> prop and read the value from the context you just imported, <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code>:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-property">children</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span><br/></div><div class="cm-line bg-github-highlight dark:bg-opacity-10"> <span class="sp-syntax-keyword">const</span> <span class="sp-syntax-plain">level</span> = <span class="sp-syntax-definition">useContext</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-plain">LevelContext</span><span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span><br/></div><div class="cm-line "> <span class="sp-syntax-comment">// ...</span><br/></div><div class="cm-line "><span class="sp-syntax-punctuation">}</span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4"><code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">useContext</code> is a Hook. Just like <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">useState</code> and <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">useReducer</code>, you can only call a Hook immediately inside a React component (not inside loops or conditions). <strong class="font-bold"><code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">useContext</code> tells React that the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Heading</code> component wants to read the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code>.</strong></p> <p class="whitespace-pre-wrap my-4">Now that the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Heading</code> component doesn’t have a <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> prop, you don’t need to pass the level prop to <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Heading</code> in your JSX like this anymore:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "><span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4">Update the JSX so that it’s the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> that receives it instead:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "><span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4">As a reminder, this is the markup that you were trying to get working:</p> </div><!--$--><div class="sandpack sandpack--playground w-full my-8" dir="ltr"><div class="sp-wrapper"><div class="shadow-lg dark:shadow-lg-dark rounded-lg" style="contain:content"><div class="bg-wash dark:bg-card-dark flex justify-between items-center relative z-10 border-b border-border dark:border-border-dark rounded-t-lg text-lg"><div class="flex-1 grow min-w-0 px-4 lg:px-6"><div><div class="relative overflow-hidden"><div class="w-[fit-content] invisible"><div class=" sp-tabs" translate="no"><div aria-label="Select active file" class=" sp-tabs-scrollable-container" role="tablist"><button aria-selected="true" class=" sp-tab-button" data-active="true" role="tab" title="/src/App.js" type="button">App.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Section.js" type="button">Section.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Heading.js" type="button">Heading.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/LevelContext.js" type="button">LevelContext.js</button></div></div></div><button class="absolute top-0 start-[2px]" id="headlessui-listbox-button-:Rj58cq6:" aria-haspopup="true" aria-expanded="false" data-headlessui-state=""><span class="h-full py-2 px-1 mt-px -mb-px flex border-b text-link dark:text-link-dark border-link dark:border-link-dark items-center text-md leading-tight truncate" style="max-width:160px">App.js<span class="ms-2"><svg class="rotate-0" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></span></button></div></div></div><div class="px-3 flex items-center justify-end text-start" translate="yes"><button class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1" title="Reset Sandbox" type="button"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative"><path d="M13.8982 5.20844C12.4626 4.88688 10.9686 4.93769 9.55821 5.35604L11.8524 3.06184C11.8989 3.0154 11.9357 2.96028 11.9608 2.89961C11.986 2.83894 11.9989 2.77391 11.9989 2.70824C11.9989 2.64256 11.986 2.57754 11.9608 2.51686C11.9357 2.45619 11.8989 2.40107 11.8524 2.35464L11.1456 1.64784C11.0992 1.60139 11.0441 1.56455 10.9834 1.53942C10.9227 1.51428 10.8577 1.50134 10.792 1.50134C10.7263 1.50134 10.6613 1.51428 10.6006 1.53942C10.54 1.56455 10.4848 1.60139 10.4384 1.64784L6.14571 5.94054C6.00654 6.07969 5.89615 6.2449 5.82083 6.42673C5.74551 6.60855 5.70675 6.80343 5.70675 7.00024C5.70675 7.19704 5.74551 7.39192 5.82083 7.57374C5.89615 7.75557 6.00654 7.92078 6.14571 8.05994L10.4387 12.3529C10.5325 12.4465 10.6595 12.4991 10.792 12.4991C10.9245 12.4991 11.0516 12.4465 11.1453 12.3529L11.8527 11.6455C11.9463 11.5518 11.9989 11.4247 11.9989 11.2922C11.9989 11.1598 11.9463 11.0327 11.8527 10.9389L8.77481 7.86104C9.99795 7.16236 11.415 6.8801 12.8125 7.05678C14.21 7.23347 15.5122 7.85953 16.523 8.84064C17.5338 9.82176 18.1983 11.1048 18.4165 12.4964C18.6347 13.888 18.3947 15.3129 17.7328 16.5562C17.0708 17.7996 16.0227 18.7942 14.7463 19.3902C13.47 19.9861 12.0345 20.1511 10.6563 19.8603C9.27798 19.5695 8.03152 18.8387 7.10469 17.778C6.17786 16.7172 5.62086 15.384 5.51761 13.9791C5.51156 13.8512 5.45689 13.7303 5.36477 13.6413C5.27265 13.5522 5.15001 13.5017 5.02191 13.5H4.02081C3.95297 13.4996 3.88574 13.5129 3.8232 13.5392C3.76065 13.5655 3.70408 13.6042 3.6569 13.6529C3.60972 13.7017 3.57291 13.7595 3.54869 13.8228C3.52448 13.8862 3.51336 13.9538 3.51601 14.0216C3.61349 15.5965 4.1473 17.1132 5.0577 18.4019C5.9681 19.6906 7.21917 20.7006 8.6709 21.3188C10.1226 21.937 11.7178 22.139 13.2778 21.9022C14.8378 21.6654 16.3011 20.9992 17.504 19.978C18.7069 18.9569 19.6019 17.6212 20.0889 16.1203C20.5759 14.6195 20.6356 13.0128 20.2614 11.4799C19.8872 9.94705 19.0938 8.54858 17.97 7.44098C16.8462 6.33339 15.4363 5.56037 13.8982 5.20844V5.20844Z" fill="currentColor"></path></svg> Reset</button><a href="https://codesandbox.io/api/v1/sandboxes/define?undefined&environment=create-react-app" rel="noreferrer noopener" target="_blank" title="Open in CodeSandbox" class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1 ms-2 md:ms-1"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative top-[1px]"><path d="M20.5001 2H15.5001C15.3675 2 15.2403 2.05268 15.1465 2.14645C15.0528 2.24021 15.0001 2.36739 15.0001 2.5V3.5C15.0001 3.63261 15.0528 3.75979 15.1465 3.85355C15.2403 3.94732 15.3675 4 15.5001 4H18.5901L7.6501 14.94C7.60323 14.9865 7.56604 15.0418 7.54065 15.1027C7.51527 15.1636 7.5022 15.229 7.5022 15.295C7.5022 15.361 7.51527 15.4264 7.54065 15.4873C7.56604 15.5482 7.60323 15.6035 7.6501 15.65L8.3501 16.35C8.39658 16.3969 8.45188 16.4341 8.51281 16.4594C8.57374 16.4848 8.63909 16.4979 8.7051 16.4979C8.7711 16.4979 8.83646 16.4848 8.89738 16.4594C8.95831 16.4341 9.01362 16.3969 9.0601 16.35L20.0001 5.41V8.5C20.0001 8.63261 20.0528 8.75979 20.1465 8.85355C20.2403 8.94732 20.3675 9 20.5001 9H21.5001C21.6327 9 21.7599 8.94732 21.8537 8.85355C21.9474 8.75979 22.0001 8.63261 22.0001 8.5V3.5C22.0001 3.10218 21.8421 2.72064 21.5608 2.43934C21.2795 2.15804 20.8979 2 20.5001 2V2Z" fill="currentColor"></path><path d="M21.5 13H20.5C20.3674 13 20.2402 13.0527 20.1464 13.1464C20.0527 13.2402 20 13.3674 20 13.5V20H4V4H10.5C10.6326 4 10.7598 3.94732 10.8536 3.85355C10.9473 3.75979 11 3.63261 11 3.5V2.5C11 2.36739 10.9473 2.24021 10.8536 2.14645C10.7598 2.05268 10.6326 2 10.5 2H3.5C3.10218 2 2.72064 2.15804 2.43934 2.43934C2.15804 2.72064 2 3.10218 2 3.5V20.5C2 20.8978 2.15804 21.2794 2.43934 21.5607C2.72064 21.842 3.10218 22 3.5 22H20.5C20.8978 22 21.2794 21.842 21.5607 21.5607C21.842 21.2794 22 20.8978 22 20.5V13.5C22 13.3674 21.9473 13.2402 21.8536 13.1464C21.7598 13.0527 21.6326 13 21.5 13Z" fill="currentColor"></path></svg><span class="hidden md:block">Fork</span></a></div></div><div class=" sp-layout"><div class=" sp-editor sp-stack"><div class=" sp-code-editor"><div aria-autocomplete="list" aria-label="Code Editor for App.js" aria-multiline="true" class="sp-pristine sp-javascript sp-cm" role="textbox" tabindex="0" translate="no"><pre class=" sp-pre-placeholder" style="margin-left:var(--sp-space-11)"><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Heading</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Heading.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Section</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Section.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Page</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">1</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Title<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">2</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> </pre></div></div></div><div class=" order-last xl:order-2 sp-stack"><div class="p-0 sm:p-2 md:p-4 lg:p-8 bg-card dark:bg-wash-dark h-full relative md:rounded-b-lg lg:rounded-b-none"><div style="position:relative"><iframe class="rounded-t-none bg-white md:shadow-md sm:rounded-lg w-full max-w-full transition-opacity absolute opacity-0 pointer-events-none duration-75" title="Sandbox Preview" style="height:15px;z-index:-1"></iframe></div></div></div><button translate="yes" class="sandpack-expand flex text-base justify-between dark:border-card-dark bg-wash dark:bg-card-dark items-center z-10 p-1 w-full order-2 xl:order-last border-b-1 relative top-0"><span class="flex p-2 focus:outline-none text-primary dark:text-primary-dark leading-[20px]"><svg class="rotate-0 inline me-1.5 text-xl" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg>Show more</span></button></div></div></div></div><!--/$--><div class="max-w-4xl ms-0 2xl:mx-auto"> <p class="whitespace-pre-wrap my-4">Notice this example doesn’t quite work, yet! All the headings have the same size because <strong class="font-bold">even though you’re <em>using</em> the context, you have not <em>provided</em> it yet.</strong> React doesn’t know where to get it!</p> <p class="whitespace-pre-wrap my-4">If you don’t provide the context, React will use the default value you’ve specified in the previous step. In this example, you specified <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">1</code> as the argument to <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">createContext</code>, so <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">useContext(LevelContext)</code> returns <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">1</code>, setting all those headings to <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><h1></code>. Let’s fix this problem by having each <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> provide its own context.</p> <h3 id="step-3-provide-the-context" class="mdx-heading text-2xl font-display leading-9 text-primary dark:text-primary-dark font-bold my-6">Step 3: Provide the context <a href="#step-3-provide-the-context" aria-label="Link for Step 3: Provide the context " title="Link for Step 3: Provide the context " class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h3> <p class="whitespace-pre-wrap my-4">The <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> component currently renders its children:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-property">children</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span><br/></div><div class="cm-line "> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">section</span> <span class="sp-syntax-property">className</span>=<span class="sp-syntax-string">"section"</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">children</span><span class="sp-syntax-punctuation">}</span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">section</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span><br/></div><div class="cm-line "><span class="sp-syntax-punctuation">}</span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4"><strong class="font-bold">Wrap them with a context provider</strong> to provide the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code> to them:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line bg-github-highlight dark:bg-opacity-10"><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-plain">LevelContext</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./LevelContext.js'</span><span class="sp-syntax-punctuation">;</span><br/></div><div class="cm-line "><br/></div><div class="cm-line "><span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-property">level</span><span class="sp-syntax-punctuation">,</span> <span class="sp-syntax-property">children</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span><br/></div><div class="cm-line "> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">section</span> <span class="sp-syntax-property">className</span>=<span class="sp-syntax-string">"section"</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line bg-github-highlight dark:bg-opacity-10"> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">LevelContext</span> <span class="sp-syntax-property">value</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">level</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">children</span><span class="sp-syntax-punctuation">}</span><br/></div><div class="cm-line bg-github-highlight dark:bg-opacity-10"> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">LevelContext</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">section</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span><br/></div><div class="cm-line "><span class="sp-syntax-punctuation">}</span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4">This tells React: “if any component inside this <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Section></code> asks for <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code>, give them this <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code>.” The component will use the value of the nearest <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><LevelContext></code> in the UI tree above it.</p> </div><!--$--><div class="sandpack sandpack--playground w-full my-8" dir="ltr"><div class="sp-wrapper"><div class="shadow-lg dark:shadow-lg-dark rounded-lg" style="contain:content"><div class="bg-wash dark:bg-card-dark flex justify-between items-center relative z-10 border-b border-border dark:border-border-dark rounded-t-lg text-lg"><div class="flex-1 grow min-w-0 px-4 lg:px-6"><div><div class="relative overflow-hidden"><div class="w-[fit-content] invisible"><div class=" sp-tabs" translate="no"><div aria-label="Select active file" class=" sp-tabs-scrollable-container" role="tablist"><button aria-selected="true" class=" sp-tab-button" data-active="true" role="tab" title="/src/App.js" type="button">App.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Section.js" type="button">Section.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Heading.js" type="button">Heading.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/LevelContext.js" type="button">LevelContext.js</button></div></div></div><button class="absolute top-0 start-[2px]" id="headlessui-listbox-button-:Rj5acq6:" aria-haspopup="true" aria-expanded="false" data-headlessui-state=""><span class="h-full py-2 px-1 mt-px -mb-px flex border-b text-link dark:text-link-dark border-link dark:border-link-dark items-center text-md leading-tight truncate" style="max-width:160px">App.js<span class="ms-2"><svg class="rotate-0" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></span></button></div></div></div><div class="px-3 flex items-center justify-end text-start" translate="yes"><button class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1" title="Reset Sandbox" type="button"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative"><path d="M13.8982 5.20844C12.4626 4.88688 10.9686 4.93769 9.55821 5.35604L11.8524 3.06184C11.8989 3.0154 11.9357 2.96028 11.9608 2.89961C11.986 2.83894 11.9989 2.77391 11.9989 2.70824C11.9989 2.64256 11.986 2.57754 11.9608 2.51686C11.9357 2.45619 11.8989 2.40107 11.8524 2.35464L11.1456 1.64784C11.0992 1.60139 11.0441 1.56455 10.9834 1.53942C10.9227 1.51428 10.8577 1.50134 10.792 1.50134C10.7263 1.50134 10.6613 1.51428 10.6006 1.53942C10.54 1.56455 10.4848 1.60139 10.4384 1.64784L6.14571 5.94054C6.00654 6.07969 5.89615 6.2449 5.82083 6.42673C5.74551 6.60855 5.70675 6.80343 5.70675 7.00024C5.70675 7.19704 5.74551 7.39192 5.82083 7.57374C5.89615 7.75557 6.00654 7.92078 6.14571 8.05994L10.4387 12.3529C10.5325 12.4465 10.6595 12.4991 10.792 12.4991C10.9245 12.4991 11.0516 12.4465 11.1453 12.3529L11.8527 11.6455C11.9463 11.5518 11.9989 11.4247 11.9989 11.2922C11.9989 11.1598 11.9463 11.0327 11.8527 10.9389L8.77481 7.86104C9.99795 7.16236 11.415 6.8801 12.8125 7.05678C14.21 7.23347 15.5122 7.85953 16.523 8.84064C17.5338 9.82176 18.1983 11.1048 18.4165 12.4964C18.6347 13.888 18.3947 15.3129 17.7328 16.5562C17.0708 17.7996 16.0227 18.7942 14.7463 19.3902C13.47 19.9861 12.0345 20.1511 10.6563 19.8603C9.27798 19.5695 8.03152 18.8387 7.10469 17.778C6.17786 16.7172 5.62086 15.384 5.51761 13.9791C5.51156 13.8512 5.45689 13.7303 5.36477 13.6413C5.27265 13.5522 5.15001 13.5017 5.02191 13.5H4.02081C3.95297 13.4996 3.88574 13.5129 3.8232 13.5392C3.76065 13.5655 3.70408 13.6042 3.6569 13.6529C3.60972 13.7017 3.57291 13.7595 3.54869 13.8228C3.52448 13.8862 3.51336 13.9538 3.51601 14.0216C3.61349 15.5965 4.1473 17.1132 5.0577 18.4019C5.9681 19.6906 7.21917 20.7006 8.6709 21.3188C10.1226 21.937 11.7178 22.139 13.2778 21.9022C14.8378 21.6654 16.3011 20.9992 17.504 19.978C18.7069 18.9569 19.6019 17.6212 20.0889 16.1203C20.5759 14.6195 20.6356 13.0128 20.2614 11.4799C19.8872 9.94705 19.0938 8.54858 17.97 7.44098C16.8462 6.33339 15.4363 5.56037 13.8982 5.20844V5.20844Z" fill="currentColor"></path></svg> Reset</button><a href="https://codesandbox.io/api/v1/sandboxes/define?undefined&environment=create-react-app" rel="noreferrer noopener" target="_blank" title="Open in CodeSandbox" class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1 ms-2 md:ms-1"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative top-[1px]"><path d="M20.5001 2H15.5001C15.3675 2 15.2403 2.05268 15.1465 2.14645C15.0528 2.24021 15.0001 2.36739 15.0001 2.5V3.5C15.0001 3.63261 15.0528 3.75979 15.1465 3.85355C15.2403 3.94732 15.3675 4 15.5001 4H18.5901L7.6501 14.94C7.60323 14.9865 7.56604 15.0418 7.54065 15.1027C7.51527 15.1636 7.5022 15.229 7.5022 15.295C7.5022 15.361 7.51527 15.4264 7.54065 15.4873C7.56604 15.5482 7.60323 15.6035 7.6501 15.65L8.3501 16.35C8.39658 16.3969 8.45188 16.4341 8.51281 16.4594C8.57374 16.4848 8.63909 16.4979 8.7051 16.4979C8.7711 16.4979 8.83646 16.4848 8.89738 16.4594C8.95831 16.4341 9.01362 16.3969 9.0601 16.35L20.0001 5.41V8.5C20.0001 8.63261 20.0528 8.75979 20.1465 8.85355C20.2403 8.94732 20.3675 9 20.5001 9H21.5001C21.6327 9 21.7599 8.94732 21.8537 8.85355C21.9474 8.75979 22.0001 8.63261 22.0001 8.5V3.5C22.0001 3.10218 21.8421 2.72064 21.5608 2.43934C21.2795 2.15804 20.8979 2 20.5001 2V2Z" fill="currentColor"></path><path d="M21.5 13H20.5C20.3674 13 20.2402 13.0527 20.1464 13.1464C20.0527 13.2402 20 13.3674 20 13.5V20H4V4H10.5C10.6326 4 10.7598 3.94732 10.8536 3.85355C10.9473 3.75979 11 3.63261 11 3.5V2.5C11 2.36739 10.9473 2.24021 10.8536 2.14645C10.7598 2.05268 10.6326 2 10.5 2H3.5C3.10218 2 2.72064 2.15804 2.43934 2.43934C2.15804 2.72064 2 3.10218 2 3.5V20.5C2 20.8978 2.15804 21.2794 2.43934 21.5607C2.72064 21.842 3.10218 22 3.5 22H20.5C20.8978 22 21.2794 21.842 21.5607 21.5607C21.842 21.2794 22 20.8978 22 20.5V13.5C22 13.3674 21.9473 13.2402 21.8536 13.1464C21.7598 13.0527 21.6326 13 21.5 13Z" fill="currentColor"></path></svg><span class="hidden md:block">Fork</span></a></div></div><div class=" sp-layout"><div class=" sp-editor sp-stack"><div class=" sp-code-editor"><div aria-autocomplete="list" aria-label="Code Editor for App.js" aria-multiline="true" class="sp-pristine sp-javascript sp-cm" role="textbox" tabindex="0" translate="no"><pre class=" sp-pre-placeholder" style="margin-left:var(--sp-space-11)"><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Heading</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Heading.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Section</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Section.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Page</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">1</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Title<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">2</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">4</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> </pre></div></div></div><div class=" order-last xl:order-2 sp-stack"><div class="p-0 sm:p-2 md:p-4 lg:p-8 bg-card dark:bg-wash-dark h-full relative md:rounded-b-lg lg:rounded-b-none"><div style="position:relative"><iframe class="rounded-t-none bg-white md:shadow-md sm:rounded-lg w-full max-w-full transition-opacity absolute opacity-0 pointer-events-none duration-75" title="Sandbox Preview" style="height:15px;z-index:-1"></iframe></div></div></div><button translate="yes" class="sandpack-expand flex text-base justify-between dark:border-card-dark bg-wash dark:bg-card-dark items-center z-10 p-1 w-full order-2 xl:order-last border-b-1 relative top-0"><span class="flex p-2 focus:outline-none text-primary dark:text-primary-dark leading-[20px]"><svg class="rotate-0 inline me-1.5 text-xl" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg>Show more</span></button></div></div></div></div><!--/$--><div class="max-w-4xl ms-0 2xl:mx-auto"> <p class="whitespace-pre-wrap my-4">It’s the same result as the original code, but you did not need to pass the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> prop to each <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Heading</code> component! Instead, it “figures out” its heading level by asking the closest <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> above:</p> <ol class="ms-6 my-3 list-decimal"> <li class="leading-relaxed mb-1">You pass a <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> prop to the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Section></code>.</li> <li class="leading-relaxed mb-1"><code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> wraps its children into <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><LevelContext value={level}></code>.</li> <li class="leading-relaxed mb-1"><code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Heading</code> asks the closest value of <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code> above with <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">useContext(LevelContext)</code>.</li> </ol> <h2 id="using-and-providing-context-from-the-same-component" class="mdx-heading text-3xl font-display leading-10 text-primary dark:text-primary-dark font-bold my-6">Using and providing context from the same component <a href="#using-and-providing-context-from-the-same-component" aria-label="Link for Using and providing context from the same component " title="Link for Using and providing context from the same component " class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h2> <p class="whitespace-pre-wrap my-4">Currently, you still have to specify each section’s <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> manually:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Page</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span><br/></div><div class="cm-line "> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">1</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> ...<br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">2</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> ...<br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">level</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">3</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> ...</div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4">Since context lets you read information from a component above, each <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> could read the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> from the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> above, and pass <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level + 1</code> down automatically. Here is how you could do it:</p> <!--$--><div dir="ltr" class="sandpack sandpack--codeblock rounded-2xl h-full w-full overflow-x-auto flex items-center bg-wash dark:bg-gray-95 shadow-lg my-8" style="contain:content"><div class="sp-wrapper"><div class="sp-stack"><div class="sp-code-editor"><pre class="sp-cm sp-pristine sp-javascript flex align-start"><code class="sp-pre-placeholder grow-[2]"><div class="cm-line "><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-plain">useContext</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'react'</span><span class="sp-syntax-punctuation">;</span><br/></div><div class="cm-line "><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-plain">LevelContext</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./LevelContext.js'</span><span class="sp-syntax-punctuation">;</span><br/></div><div class="cm-line "><br/></div><div class="cm-line "><span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-property">children</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span><br/></div><div class="cm-line bg-github-highlight dark:bg-opacity-10"> <span class="sp-syntax-keyword">const</span> <span class="sp-syntax-plain">level</span> = <span class="sp-syntax-definition">useContext</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-plain">LevelContext</span><span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span><br/></div><div class="cm-line "> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">section</span> <span class="sp-syntax-property">className</span>=<span class="sp-syntax-string">"section"</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line bg-github-highlight dark:bg-opacity-10"> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">LevelContext</span> <span class="sp-syntax-property">value</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">level</span> + <span class="sp-syntax-static">1</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">children</span><span class="sp-syntax-punctuation">}</span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">LevelContext</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">section</span><span class="sp-syntax-punctuation">></span><br/></div><div class="cm-line "> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span><br/></div><div class="cm-line "><span class="sp-syntax-punctuation">}</span></div></code></pre></div></div></div></div><!--/$--> <p class="whitespace-pre-wrap my-4">With this change, you don’t need to pass the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">level</code> prop <em>either</em> to the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Section></code> or to the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Heading></code>:</p> </div><!--$--><div class="sandpack sandpack--playground w-full my-8" dir="ltr"><div class="sp-wrapper"><div class="shadow-lg dark:shadow-lg-dark rounded-lg" style="contain:content"><div class="bg-wash dark:bg-card-dark flex justify-between items-center relative z-10 border-b border-border dark:border-border-dark rounded-t-lg text-lg"><div class="flex-1 grow min-w-0 px-4 lg:px-6"><div><div class="relative overflow-hidden"><div class="w-[fit-content] invisible"><div class=" sp-tabs" translate="no"><div aria-label="Select active file" class=" sp-tabs-scrollable-container" role="tablist"><button aria-selected="true" class=" sp-tab-button" data-active="true" role="tab" title="/src/App.js" type="button">App.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Section.js" type="button">Section.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Heading.js" type="button">Heading.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/LevelContext.js" type="button">LevelContext.js</button></div></div></div><button class="absolute top-0 start-[2px]" id="headlessui-listbox-button-:Rj5ccq6:" aria-haspopup="true" aria-expanded="false" data-headlessui-state=""><span class="h-full py-2 px-1 mt-px -mb-px flex border-b text-link dark:text-link-dark border-link dark:border-link-dark items-center text-md leading-tight truncate" style="max-width:160px">App.js<span class="ms-2"><svg class="rotate-0" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></span></button></div></div></div><div class="px-3 flex items-center justify-end text-start" translate="yes"><button class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1" title="Reset Sandbox" type="button"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative"><path d="M13.8982 5.20844C12.4626 4.88688 10.9686 4.93769 9.55821 5.35604L11.8524 3.06184C11.8989 3.0154 11.9357 2.96028 11.9608 2.89961C11.986 2.83894 11.9989 2.77391 11.9989 2.70824C11.9989 2.64256 11.986 2.57754 11.9608 2.51686C11.9357 2.45619 11.8989 2.40107 11.8524 2.35464L11.1456 1.64784C11.0992 1.60139 11.0441 1.56455 10.9834 1.53942C10.9227 1.51428 10.8577 1.50134 10.792 1.50134C10.7263 1.50134 10.6613 1.51428 10.6006 1.53942C10.54 1.56455 10.4848 1.60139 10.4384 1.64784L6.14571 5.94054C6.00654 6.07969 5.89615 6.2449 5.82083 6.42673C5.74551 6.60855 5.70675 6.80343 5.70675 7.00024C5.70675 7.19704 5.74551 7.39192 5.82083 7.57374C5.89615 7.75557 6.00654 7.92078 6.14571 8.05994L10.4387 12.3529C10.5325 12.4465 10.6595 12.4991 10.792 12.4991C10.9245 12.4991 11.0516 12.4465 11.1453 12.3529L11.8527 11.6455C11.9463 11.5518 11.9989 11.4247 11.9989 11.2922C11.9989 11.1598 11.9463 11.0327 11.8527 10.9389L8.77481 7.86104C9.99795 7.16236 11.415 6.8801 12.8125 7.05678C14.21 7.23347 15.5122 7.85953 16.523 8.84064C17.5338 9.82176 18.1983 11.1048 18.4165 12.4964C18.6347 13.888 18.3947 15.3129 17.7328 16.5562C17.0708 17.7996 16.0227 18.7942 14.7463 19.3902C13.47 19.9861 12.0345 20.1511 10.6563 19.8603C9.27798 19.5695 8.03152 18.8387 7.10469 17.778C6.17786 16.7172 5.62086 15.384 5.51761 13.9791C5.51156 13.8512 5.45689 13.7303 5.36477 13.6413C5.27265 13.5522 5.15001 13.5017 5.02191 13.5H4.02081C3.95297 13.4996 3.88574 13.5129 3.8232 13.5392C3.76065 13.5655 3.70408 13.6042 3.6569 13.6529C3.60972 13.7017 3.57291 13.7595 3.54869 13.8228C3.52448 13.8862 3.51336 13.9538 3.51601 14.0216C3.61349 15.5965 4.1473 17.1132 5.0577 18.4019C5.9681 19.6906 7.21917 20.7006 8.6709 21.3188C10.1226 21.937 11.7178 22.139 13.2778 21.9022C14.8378 21.6654 16.3011 20.9992 17.504 19.978C18.7069 18.9569 19.6019 17.6212 20.0889 16.1203C20.5759 14.6195 20.6356 13.0128 20.2614 11.4799C19.8872 9.94705 19.0938 8.54858 17.97 7.44098C16.8462 6.33339 15.4363 5.56037 13.8982 5.20844V5.20844Z" fill="currentColor"></path></svg> Reset</button><a href="https://codesandbox.io/api/v1/sandboxes/define?undefined&environment=create-react-app" rel="noreferrer noopener" target="_blank" title="Open in CodeSandbox" class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1 ms-2 md:ms-1"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative top-[1px]"><path d="M20.5001 2H15.5001C15.3675 2 15.2403 2.05268 15.1465 2.14645C15.0528 2.24021 15.0001 2.36739 15.0001 2.5V3.5C15.0001 3.63261 15.0528 3.75979 15.1465 3.85355C15.2403 3.94732 15.3675 4 15.5001 4H18.5901L7.6501 14.94C7.60323 14.9865 7.56604 15.0418 7.54065 15.1027C7.51527 15.1636 7.5022 15.229 7.5022 15.295C7.5022 15.361 7.51527 15.4264 7.54065 15.4873C7.56604 15.5482 7.60323 15.6035 7.6501 15.65L8.3501 16.35C8.39658 16.3969 8.45188 16.4341 8.51281 16.4594C8.57374 16.4848 8.63909 16.4979 8.7051 16.4979C8.7711 16.4979 8.83646 16.4848 8.89738 16.4594C8.95831 16.4341 9.01362 16.3969 9.0601 16.35L20.0001 5.41V8.5C20.0001 8.63261 20.0528 8.75979 20.1465 8.85355C20.2403 8.94732 20.3675 9 20.5001 9H21.5001C21.6327 9 21.7599 8.94732 21.8537 8.85355C21.9474 8.75979 22.0001 8.63261 22.0001 8.5V3.5C22.0001 3.10218 21.8421 2.72064 21.5608 2.43934C21.2795 2.15804 20.8979 2 20.5001 2V2Z" fill="currentColor"></path><path d="M21.5 13H20.5C20.3674 13 20.2402 13.0527 20.1464 13.1464C20.0527 13.2402 20 13.3674 20 13.5V20H4V4H10.5C10.6326 4 10.7598 3.94732 10.8536 3.85355C10.9473 3.75979 11 3.63261 11 3.5V2.5C11 2.36739 10.9473 2.24021 10.8536 2.14645C10.7598 2.05268 10.6326 2 10.5 2H3.5C3.10218 2 2.72064 2.15804 2.43934 2.43934C2.15804 2.72064 2 3.10218 2 3.5V20.5C2 20.8978 2.15804 21.2794 2.43934 21.5607C2.72064 21.842 3.10218 22 3.5 22H20.5C20.8978 22 21.2794 21.842 21.5607 21.5607C21.842 21.2794 22 20.8978 22 20.5V13.5C22 13.3674 21.9473 13.2402 21.8536 13.1464C21.7598 13.0527 21.6326 13 21.5 13Z" fill="currentColor"></path></svg><span class="hidden md:block">Fork</span></a></div></div><div class=" sp-layout"><div class=" sp-editor sp-stack"><div class=" sp-code-editor"><div aria-autocomplete="list" aria-label="Code Editor for App.js" aria-multiline="true" class="sp-pristine sp-javascript sp-cm" role="textbox" tabindex="0" translate="no"><pre class=" sp-pre-placeholder" style="margin-left:var(--sp-space-11)"><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Heading</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Heading.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Section</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Section.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Page</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Title<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Sub-sub-heading<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> </pre></div></div></div><div class=" order-last xl:order-2 sp-stack"><div class="p-0 sm:p-2 md:p-4 lg:p-8 bg-card dark:bg-wash-dark h-full relative md:rounded-b-lg lg:rounded-b-none"><div style="position:relative"><iframe class="rounded-t-none bg-white md:shadow-md sm:rounded-lg w-full max-w-full transition-opacity absolute opacity-0 pointer-events-none duration-75" title="Sandbox Preview" style="height:15px;z-index:-1"></iframe></div></div></div><button translate="yes" class="sandpack-expand flex text-base justify-between dark:border-card-dark bg-wash dark:bg-card-dark items-center z-10 p-1 w-full order-2 xl:order-last border-b-1 relative top-0"><span class="flex p-2 focus:outline-none text-primary dark:text-primary-dark leading-[20px]"><svg class="rotate-0 inline me-1.5 text-xl" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg>Show more</span></button></div></div></div></div><!--/$--><div class="max-w-4xl ms-0 2xl:mx-auto"> <p class="whitespace-pre-wrap my-4">Now both <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Heading</code> and <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> read the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code> to figure out how “deep” they are. And the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> wraps its children into the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">LevelContext</code> to specify that anything inside of it is at a “deeper” level.</p> <div class="expandable-callout pt-8 pb-4 px-5 sm:px-8 my-8 relative rounded-none shadow-inner-border -mx-5 sm:mx-auto sm:rounded-2xl bg-green-5 dark:bg-green-60 dark:bg-opacity-20 text-primary dark:text-primary-dark text-lg"><h3 class="text-2xl font-display font-bold text-green-60 dark:text-green-40"><svg class="inline me-2 mb-1 text-lg text-green-60 dark:text-green-40" width="2em" height="2em" viewBox="0 0 72 72" fill="none" xmlns="http://www.w3.org/2000/svg"><g clip-path="url(#clip0_40_48064)"><path d="M24 27C24 25.3431 25.3431 24 27 24H45C46.6569 24 48 25.3431 48 27C48 28.6569 46.6569 30 45 30H27C25.3431 30 24 28.6569 24 27Z" fill="currentColor"></path><path d="M24 39C24 37.3431 25.3431 36 27 36H39C40.6569 36 42 37.3431 42 39C42 40.6569 40.6569 42 39 42H27C25.3431 42 24 40.6569 24 39Z" fill="currentColor"></path><path fill-rule="evenodd" clip-rule="evenodd" d="M12 18C12 13.0294 16.0294 9 21 9H51C55.9706 9 60 13.0294 60 18V54C60 58.9706 55.9706 63 51 63H21C16.0294 63 12 58.9706 12 54V18ZM21 15H51C52.6569 15 54 16.3431 54 18V54C54 55.6569 52.6569 57 51 57H21C19.3431 57 18 55.6569 18 54V18C18 16.3431 19.3431 15 21 15Z" fill="currentColor"></path></g><defs><clipPath id="clip0_40_48064"><rect width="72" height="72" fill="white"></rect></clipPath></defs></svg>Note</h3><div class="relative"><div class="py-2"><p class="whitespace-pre-wrap my-4">This example uses heading levels because they show visually how nested components can override context. But context is useful for many other use cases too. You can pass down any information needed by the entire subtree: the current color theme, the currently logged in user, and so on.</p></div></div></div> <h2 id="context-passes-through-intermediate-components" class="mdx-heading text-3xl font-display leading-10 text-primary dark:text-primary-dark font-bold my-6">Context passes through intermediate components <a href="#context-passes-through-intermediate-components" aria-label="Link for Context passes through intermediate components " title="Link for Context passes through intermediate components " class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h2> <p class="whitespace-pre-wrap my-4">You can insert as many components as you like between the component that provides context and the one that uses it. This includes both built-in components like <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><div></code> and components you might build yourself.</p> <p class="whitespace-pre-wrap my-4">In this example, the same <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Post</code> component (with a dashed border) is rendered at two different nesting levels. Notice that the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Heading></code> inside of it gets its level automatically from the closest <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Section></code>:</p> </div><!--$--><div class="sandpack sandpack--playground w-full my-8" dir="ltr"><div class="sp-wrapper"><div class="shadow-lg dark:shadow-lg-dark rounded-lg" style="contain:content"><div class="bg-wash dark:bg-card-dark flex justify-between items-center relative z-10 border-b border-border dark:border-border-dark rounded-t-lg text-lg"><div class="flex-1 grow min-w-0 px-4 lg:px-6"><div><div class="relative overflow-hidden"><div class="w-[fit-content] invisible"><div class=" sp-tabs" translate="no"><div aria-label="Select active file" class=" sp-tabs-scrollable-container" role="tablist"><button aria-selected="true" class=" sp-tab-button" data-active="true" role="tab" title="/src/App.js" type="button">App.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Section.js" type="button">Section.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Heading.js" type="button">Heading.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/LevelContext.js" type="button">LevelContext.js</button></div></div></div><button class="absolute top-0 start-[2px]" id="headlessui-listbox-button-:Rj5ecq6:" aria-haspopup="true" aria-expanded="false" data-headlessui-state=""><span class="h-full py-2 px-1 mt-px -mb-px flex border-b text-link dark:text-link-dark border-link dark:border-link-dark items-center text-md leading-tight truncate" style="max-width:160px">App.js<span class="ms-2"><svg class="rotate-0" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></span></button></div></div></div><div class="px-3 flex items-center justify-end text-start" translate="yes"><button class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1" title="Reset Sandbox" type="button"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative"><path d="M13.8982 5.20844C12.4626 4.88688 10.9686 4.93769 9.55821 5.35604L11.8524 3.06184C11.8989 3.0154 11.9357 2.96028 11.9608 2.89961C11.986 2.83894 11.9989 2.77391 11.9989 2.70824C11.9989 2.64256 11.986 2.57754 11.9608 2.51686C11.9357 2.45619 11.8989 2.40107 11.8524 2.35464L11.1456 1.64784C11.0992 1.60139 11.0441 1.56455 10.9834 1.53942C10.9227 1.51428 10.8577 1.50134 10.792 1.50134C10.7263 1.50134 10.6613 1.51428 10.6006 1.53942C10.54 1.56455 10.4848 1.60139 10.4384 1.64784L6.14571 5.94054C6.00654 6.07969 5.89615 6.2449 5.82083 6.42673C5.74551 6.60855 5.70675 6.80343 5.70675 7.00024C5.70675 7.19704 5.74551 7.39192 5.82083 7.57374C5.89615 7.75557 6.00654 7.92078 6.14571 8.05994L10.4387 12.3529C10.5325 12.4465 10.6595 12.4991 10.792 12.4991C10.9245 12.4991 11.0516 12.4465 11.1453 12.3529L11.8527 11.6455C11.9463 11.5518 11.9989 11.4247 11.9989 11.2922C11.9989 11.1598 11.9463 11.0327 11.8527 10.9389L8.77481 7.86104C9.99795 7.16236 11.415 6.8801 12.8125 7.05678C14.21 7.23347 15.5122 7.85953 16.523 8.84064C17.5338 9.82176 18.1983 11.1048 18.4165 12.4964C18.6347 13.888 18.3947 15.3129 17.7328 16.5562C17.0708 17.7996 16.0227 18.7942 14.7463 19.3902C13.47 19.9861 12.0345 20.1511 10.6563 19.8603C9.27798 19.5695 8.03152 18.8387 7.10469 17.778C6.17786 16.7172 5.62086 15.384 5.51761 13.9791C5.51156 13.8512 5.45689 13.7303 5.36477 13.6413C5.27265 13.5522 5.15001 13.5017 5.02191 13.5H4.02081C3.95297 13.4996 3.88574 13.5129 3.8232 13.5392C3.76065 13.5655 3.70408 13.6042 3.6569 13.6529C3.60972 13.7017 3.57291 13.7595 3.54869 13.8228C3.52448 13.8862 3.51336 13.9538 3.51601 14.0216C3.61349 15.5965 4.1473 17.1132 5.0577 18.4019C5.9681 19.6906 7.21917 20.7006 8.6709 21.3188C10.1226 21.937 11.7178 22.139 13.2778 21.9022C14.8378 21.6654 16.3011 20.9992 17.504 19.978C18.7069 18.9569 19.6019 17.6212 20.0889 16.1203C20.5759 14.6195 20.6356 13.0128 20.2614 11.4799C19.8872 9.94705 19.0938 8.54858 17.97 7.44098C16.8462 6.33339 15.4363 5.56037 13.8982 5.20844V5.20844Z" fill="currentColor"></path></svg> Reset</button><a href="https://codesandbox.io/api/v1/sandboxes/define?undefined&environment=create-react-app" rel="noreferrer noopener" target="_blank" title="Open in CodeSandbox" class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1 ms-2 md:ms-1"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative top-[1px]"><path d="M20.5001 2H15.5001C15.3675 2 15.2403 2.05268 15.1465 2.14645C15.0528 2.24021 15.0001 2.36739 15.0001 2.5V3.5C15.0001 3.63261 15.0528 3.75979 15.1465 3.85355C15.2403 3.94732 15.3675 4 15.5001 4H18.5901L7.6501 14.94C7.60323 14.9865 7.56604 15.0418 7.54065 15.1027C7.51527 15.1636 7.5022 15.229 7.5022 15.295C7.5022 15.361 7.51527 15.4264 7.54065 15.4873C7.56604 15.5482 7.60323 15.6035 7.6501 15.65L8.3501 16.35C8.39658 16.3969 8.45188 16.4341 8.51281 16.4594C8.57374 16.4848 8.63909 16.4979 8.7051 16.4979C8.7711 16.4979 8.83646 16.4848 8.89738 16.4594C8.95831 16.4341 9.01362 16.3969 9.0601 16.35L20.0001 5.41V8.5C20.0001 8.63261 20.0528 8.75979 20.1465 8.85355C20.2403 8.94732 20.3675 9 20.5001 9H21.5001C21.6327 9 21.7599 8.94732 21.8537 8.85355C21.9474 8.75979 22.0001 8.63261 22.0001 8.5V3.5C22.0001 3.10218 21.8421 2.72064 21.5608 2.43934C21.2795 2.15804 20.8979 2 20.5001 2V2Z" fill="currentColor"></path><path d="M21.5 13H20.5C20.3674 13 20.2402 13.0527 20.1464 13.1464C20.0527 13.2402 20 13.3674 20 13.5V20H4V4H10.5C10.6326 4 10.7598 3.94732 10.8536 3.85355C10.9473 3.75979 11 3.63261 11 3.5V2.5C11 2.36739 10.9473 2.24021 10.8536 2.14645C10.7598 2.05268 10.6326 2 10.5 2H3.5C3.10218 2 2.72064 2.15804 2.43934 2.43934C2.15804 2.72064 2 3.10218 2 3.5V20.5C2 20.8978 2.15804 21.2794 2.43934 21.5607C2.72064 21.842 3.10218 22 3.5 22H20.5C20.8978 22 21.2794 21.842 21.5607 21.5607C21.842 21.2794 22 20.8978 22 20.5V13.5C22 13.3674 21.9473 13.2402 21.8536 13.1464C21.7598 13.0527 21.6326 13 21.5 13Z" fill="currentColor"></path></svg><span class="hidden md:block">Fork</span></a></div></div><div class=" sp-layout"><div class=" sp-editor sp-stack"><div class=" sp-code-editor"><div aria-autocomplete="list" aria-label="Code Editor for App.js" aria-multiline="true" class="sp-pristine sp-javascript sp-cm" role="textbox" tabindex="0" translate="no"><pre class=" sp-pre-placeholder" style="margin-left:var(--sp-space-11)"><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Heading</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Heading.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">import</span> <span class="sp-syntax-plain">Section</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./Section.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">ProfilePage</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>My Profile<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Post</span> <span class="sp-syntax-property">title</span>=<span class="sp-syntax-string">"Hello traveller!"</span> <span class="sp-syntax-property">body</span>=<span class="sp-syntax-string">"Read about my adventures."</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">AllPosts</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">AllPosts</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Posts<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">RecentPosts</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">RecentPosts</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span>Recent Posts<span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Post</span> <span class="sp-syntax-property">title</span>=<span class="sp-syntax-string">"Flavors of Lisbon"</span> <span class="sp-syntax-property">body</span>=<span class="sp-syntax-string">"...those pastéis de nata!"</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Post</span> <span class="sp-syntax-property">title</span>=<span class="sp-syntax-string">"Buenos Aires in the rhythm of tango"</span> <span class="sp-syntax-property">body</span>=<span class="sp-syntax-string">"I loved it!"</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Post</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-property">title</span><span class="sp-syntax-punctuation">,</span> <span class="sp-syntax-property">body</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Section</span> <span class="sp-syntax-property">isFancy</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-static">true</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">title</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Heading</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">p</span><span class="sp-syntax-punctuation">></span><span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">i</span><span class="sp-syntax-punctuation">></span><span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">body</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">i</span><span class="sp-syntax-punctuation">></span><span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">p</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-definition">Section</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> </pre></div></div></div><div class=" order-last xl:order-2 sp-stack"><div class="p-0 sm:p-2 md:p-4 lg:p-8 bg-card dark:bg-wash-dark h-full relative md:rounded-b-lg lg:rounded-b-none"><div style="position:relative"><iframe class="rounded-t-none bg-white md:shadow-md sm:rounded-lg w-full max-w-full transition-opacity absolute opacity-0 pointer-events-none duration-75" title="Sandbox Preview" style="height:15px;z-index:-1"></iframe></div></div></div><button translate="yes" class="sandpack-expand flex text-base justify-between dark:border-card-dark bg-wash dark:bg-card-dark items-center z-10 p-1 w-full order-2 xl:order-last border-b-1 relative top-0"><span class="flex p-2 focus:outline-none text-primary dark:text-primary-dark leading-[20px]"><svg class="rotate-0 inline me-1.5 text-xl" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg>Show more</span></button></div></div></div></div><!--/$--><div class="max-w-4xl ms-0 2xl:mx-auto"> <p class="whitespace-pre-wrap my-4">You didn’t do anything special for this to work. A <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Section</code> specifies the context for the tree inside it, so you can insert a <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Heading></code> anywhere, and it will have the correct size. Try it in the sandbox above!</p> <p class="whitespace-pre-wrap my-4"><strong class="font-bold">Context lets you write components that “adapt to their surroundings” and display themselves differently depending on <em>where</em> (or, in other words, <em>in which context</em>) they are being rendered.</strong></p> <p class="whitespace-pre-wrap my-4">How context works might remind you of <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/inheritance" target="_blank" rel="nofollow noopener noreferrer" class="inline text-link dark:text-link-dark border-b border-link border-opacity-0 hover:border-opacity-100 duration-100 ease-in transition leading-normal">CSS property inheritance.</a> In CSS, you can specify <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">color: blue</code> for a <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><div></code>, and any DOM node inside of it, no matter how deep, will inherit that color unless some other DOM node in the middle overrides it with <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">color: green</code>. Similarly, in React, the only way to override some context coming from above is to wrap children into a context provider with a different value.</p> <p class="whitespace-pre-wrap my-4">In CSS, different properties like <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">color</code> and <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">background-color</code> don’t override each other. You can set all <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><div></code>’s <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">color</code> to red without impacting <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">background-color</code>. Similarly, <strong class="font-bold">different React contexts don’t override each other.</strong> Each context that you make with <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">createContext()</code> is completely separate from other ones, and ties together components using and providing <em>that particular</em> context. One component may use or provide many different contexts without a problem.</p> <h2 id="before-you-use-context" class="mdx-heading text-3xl font-display leading-10 text-primary dark:text-primary-dark font-bold my-6">Before you use context <a href="#before-you-use-context" aria-label="Link for Before you use context " title="Link for Before you use context " class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h2> <p class="whitespace-pre-wrap my-4">Context is very tempting to use! However, this also means it’s too easy to overuse it. <strong class="font-bold">Just because you need to pass some props several levels deep doesn’t mean you should put that information into context.</strong></p> <p class="whitespace-pre-wrap my-4">Here’s a few alternatives you should consider before using context:</p> <ol class="ms-6 my-3 list-decimal"> <li class="leading-relaxed mb-1"><strong class="font-bold">Start by <a class="inline text-link dark:text-link-dark border-b border-link border-opacity-0 hover:border-opacity-100 duration-100 ease-in transition leading-normal" href="/learn/passing-props-to-a-component">passing props.</a></strong> If your components are not trivial, it’s not unusual to pass a dozen props down through a dozen components. It may feel like a slog, but it makes it very clear which components use which data! The person maintaining your code will be glad you’ve made the data flow explicit with props.</li> <li class="leading-relaxed mb-1"><strong class="font-bold">Extract components and <a class="inline text-link dark:text-link-dark border-b border-link border-opacity-0 hover:border-opacity-100 duration-100 ease-in transition leading-normal" href="/learn/passing-props-to-a-component#passing-jsx-as-children">pass JSX as <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">children</code></a> to them.</strong> If you pass some data through many layers of intermediate components that don’t use that data (and only pass it further down), this often means that you forgot to extract some components along the way. For example, maybe you pass data props like <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">posts</code> to visual components that don’t use them directly, like <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Layout posts={posts} /></code>. Instead, make <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Layout</code> take <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">children</code> as a prop, and render <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><Layout><Posts posts={posts} /></Layout></code>. This reduces the number of layers between the component specifying the data and the one that needs it.</li> </ol> <p class="whitespace-pre-wrap my-4">If neither of these approaches works well for you, consider context.</p> <h2 id="use-cases-for-context" class="mdx-heading text-3xl font-display leading-10 text-primary dark:text-primary-dark font-bold my-6">Use cases for context <a href="#use-cases-for-context" aria-label="Link for Use cases for context " title="Link for Use cases for context " class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h2> <ul class="ms-6 my-3 list-disc"> <li class="leading-relaxed mb-1"><strong class="font-bold">Theming:</strong> If your app lets the user change its appearance (e.g. dark mode), you can put a context provider at the top of your app, and use that context in components that need to adjust their visual look.</li> <li class="leading-relaxed mb-1"><strong class="font-bold">Current account:</strong> Many components might need to know the currently logged in user. Putting it in context makes it convenient to read it anywhere in the tree. Some apps also let you operate multiple accounts at the same time (e.g. to leave a comment as a different user). In those cases, it can be convenient to wrap a part of the UI into a nested provider with a different current account value.</li> <li class="leading-relaxed mb-1"><strong class="font-bold">Routing:</strong> Most routing solutions use context internally to hold the current route. This is how every link “knows” whether it’s active or not. If you build your own router, you might want to do it too.</li> <li class="leading-relaxed mb-1"><strong class="font-bold">Managing state:</strong> As your app grows, you might end up with a lot of state closer to the top of your app. Many distant components below may want to change it. It is common to <a class="inline text-link dark:text-link-dark border-b border-link border-opacity-0 hover:border-opacity-100 duration-100 ease-in transition leading-normal" href="/learn/scaling-up-with-reducer-and-context">use a reducer together with context</a> to manage complex state and pass it down to distant components without too much hassle.</li> </ul> <p class="whitespace-pre-wrap my-4">Context is not limited to static values. If you pass a different value on the next render, React will update all the components reading it below! This is why context is often used in combination with state.</p> <p class="whitespace-pre-wrap my-4">In general, if some information is needed by distant components in different parts of the tree, it’s a good indication that context will help you.</p> <section><h2 id="recap" class="mdx-heading text-3xl font-display leading-10 text-primary dark:text-primary-dark font-bold my-6">Recap<a href="#recap" aria-label="Link for Recap" title="Link for Recap" class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h2><ul class="ms-6 my-3 list-disc"> <li class="leading-relaxed mb-1">Context lets a component provide some information to the entire tree below it.</li> <li class="leading-relaxed mb-1">To pass context:<!-- --> <ol class="ms-6 my-3 list-decimal"> <li class="leading-relaxed mb-1">Create and export it with <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">export const MyContext = createContext(defaultValue)</code>.</li> <li class="leading-relaxed mb-1">Pass it to the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">useContext(MyContext)</code> Hook to read it in any child component, no matter how deep.</li> <li class="leading-relaxed mb-1">Wrap children into <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><MyContext value={...}></code> to provide it from a parent.</li> </ol> </li> <li class="leading-relaxed mb-1">Context passes through any components in the middle.</li> <li class="leading-relaxed mb-1">Context lets you write components that “adapt to their surroundings”.</li> <li class="leading-relaxed mb-1">Before you use context, try passing props or passing JSX as <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">children</code>.</li> </ul></section> </div><div class="max-w-7xl mx-auto py-4 w-full"><div class="border-gray-10 bg-card dark:bg-card-dark shadow-inner rounded-none -mx-5 sm:mx-auto sm:rounded-2xl"><div class="py-2 px-5 sm:px-8 pb-0 md:pb-0"><h2 id="challenges" class="mdx-heading text-3xl font-display leading-10 text-primary dark:text-primary-dark font-bold my-6 mb-2 leading-10 relative text-3xl text-link">Try out some challenges<a href="#challenges" aria-label="Link for Try out some challenges" title="Link for Try out some challenges" class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h2></div><div class="p-5 sm:py-8 sm:px-8"><div><h4 id="replace-prop-drilling-with-context" class="mdx-heading text-xl text-primary dark:text-primary-dark mb-2 mt-0 font-medium text-xl font-display font-bold leading-9 my-4"><div class="font-bold block md:inline">Challenge<!-- --> <!-- -->1<!-- --> of<!-- --> <!-- -->1<span class="text-primary dark:text-primary-dark">: </span></div>Replace prop drilling with context <a href="#replace-prop-drilling-with-context" aria-label="Link for this heading" title="Link for this heading" class="mdx-header-anchor inline-block"><svg width="1em" height="1em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg" class="text-gray-70 ms-2 h-5 w-5"><g fill="currentColor" fill-rule="evenodd"><path d="M7.778 7.975a2.5 2.5 0 0 0 .347-3.837L6.017 2.03a2.498 2.498 0 0 0-3.542-.007 2.5 2.5 0 0 0 .006 3.543l1.153 1.15c.07-.29.154-.563.25-.773.036-.077.084-.16.14-.25L3.18 4.85a1.496 1.496 0 0 1 .002-2.12 1.496 1.496 0 0 1 2.12 0l2.124 2.123a1.496 1.496 0 0 1-.333 2.37c.16.246.42.504.685.752z"></path><path d="M5.657 4.557a2.5 2.5 0 0 0-.347 3.837l2.108 2.108a2.498 2.498 0 0 0 3.542.007 2.5 2.5 0 0 0-.006-3.543L9.802 5.815c-.07.29-.154.565-.25.774-.036.076-.084.16-.14.25l.842.84c.585.587.59 1.532 0 2.122-.587.585-1.532.59-2.12 0L6.008 7.68a1.496 1.496 0 0 1 .332-2.372c-.16-.245-.42-.503-.685-.75z"></path></g></svg></a></h4><p class="whitespace-pre-wrap my-4">In this example, toggling the checkbox changes the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">imageSize</code> prop passed to each <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><PlaceImage></code>. The checkbox state is held in the top-level <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">App</code> component, but each <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px"><PlaceImage></code> needs to be aware of it.</p><p class="whitespace-pre-wrap my-4">Currently, <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">App</code> passes <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">imageSize</code> to <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">List</code>, which passes it to each <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Place</code>, which passes it to the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">PlaceImage</code>. Remove the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">imageSize</code> prop, and instead pass it from the <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">App</code> component directly to <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">PlaceImage</code>.</p><p class="whitespace-pre-wrap my-4">You can declare context in <code dir="ltr" class="inline text-code text-secondary dark:text-secondary-dark px-1 rounded-md no-underline bg-gray-30 bg-opacity-10 py-px">Context.js</code>.</p><!--$--><div class="sandpack sandpack--playground w-full my-8" dir="ltr"><div class="sp-wrapper"><div class="shadow-lg dark:shadow-lg-dark rounded-lg" style="contain:content"><div class="bg-wash dark:bg-card-dark flex justify-between items-center relative z-10 border-b border-border dark:border-border-dark rounded-t-lg text-lg"><div class="flex-1 grow min-w-0 px-4 lg:px-6"><div><div class="relative overflow-hidden"><div class="w-[fit-content] invisible"><div class=" sp-tabs" translate="no"><div aria-label="Select active file" class=" sp-tabs-scrollable-container" role="tablist"><button aria-selected="true" class=" sp-tab-button" data-active="true" role="tab" title="/src/App.js" type="button">App.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/Context.js" type="button">Context.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/data.js" type="button">data.js</button><button aria-selected="false" class=" sp-tab-button" data-active="false" role="tab" title="/src/utils.js" type="button">utils.js</button></div></div></div><button class="absolute top-0 start-[2px]" id="headlessui-listbox-button-:Rj5i6gcq6:" aria-haspopup="true" aria-expanded="false" data-headlessui-state=""><span class="h-full py-2 px-1 mt-px -mb-px flex border-b text-link dark:text-link-dark border-link dark:border-link-dark items-center text-md leading-tight truncate" style="max-width:160px">App.js<span class="ms-2"><svg class="rotate-0" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg></span></span></button></div></div></div><div class="px-3 flex items-center justify-end text-start" translate="yes"><button class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1" title="Reset Sandbox" type="button"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative"><path d="M13.8982 5.20844C12.4626 4.88688 10.9686 4.93769 9.55821 5.35604L11.8524 3.06184C11.8989 3.0154 11.9357 2.96028 11.9608 2.89961C11.986 2.83894 11.9989 2.77391 11.9989 2.70824C11.9989 2.64256 11.986 2.57754 11.9608 2.51686C11.9357 2.45619 11.8989 2.40107 11.8524 2.35464L11.1456 1.64784C11.0992 1.60139 11.0441 1.56455 10.9834 1.53942C10.9227 1.51428 10.8577 1.50134 10.792 1.50134C10.7263 1.50134 10.6613 1.51428 10.6006 1.53942C10.54 1.56455 10.4848 1.60139 10.4384 1.64784L6.14571 5.94054C6.00654 6.07969 5.89615 6.2449 5.82083 6.42673C5.74551 6.60855 5.70675 6.80343 5.70675 7.00024C5.70675 7.19704 5.74551 7.39192 5.82083 7.57374C5.89615 7.75557 6.00654 7.92078 6.14571 8.05994L10.4387 12.3529C10.5325 12.4465 10.6595 12.4991 10.792 12.4991C10.9245 12.4991 11.0516 12.4465 11.1453 12.3529L11.8527 11.6455C11.9463 11.5518 11.9989 11.4247 11.9989 11.2922C11.9989 11.1598 11.9463 11.0327 11.8527 10.9389L8.77481 7.86104C9.99795 7.16236 11.415 6.8801 12.8125 7.05678C14.21 7.23347 15.5122 7.85953 16.523 8.84064C17.5338 9.82176 18.1983 11.1048 18.4165 12.4964C18.6347 13.888 18.3947 15.3129 17.7328 16.5562C17.0708 17.7996 16.0227 18.7942 14.7463 19.3902C13.47 19.9861 12.0345 20.1511 10.6563 19.8603C9.27798 19.5695 8.03152 18.8387 7.10469 17.778C6.17786 16.7172 5.62086 15.384 5.51761 13.9791C5.51156 13.8512 5.45689 13.7303 5.36477 13.6413C5.27265 13.5522 5.15001 13.5017 5.02191 13.5H4.02081C3.95297 13.4996 3.88574 13.5129 3.8232 13.5392C3.76065 13.5655 3.70408 13.6042 3.6569 13.6529C3.60972 13.7017 3.57291 13.7595 3.54869 13.8228C3.52448 13.8862 3.51336 13.9538 3.51601 14.0216C3.61349 15.5965 4.1473 17.1132 5.0577 18.4019C5.9681 19.6906 7.21917 20.7006 8.6709 21.3188C10.1226 21.937 11.7178 22.139 13.2778 21.9022C14.8378 21.6654 16.3011 20.9992 17.504 19.978C18.7069 18.9569 19.6019 17.6212 20.0889 16.1203C20.5759 14.6195 20.6356 13.0128 20.2614 11.4799C19.8872 9.94705 19.0938 8.54858 17.97 7.44098C16.8462 6.33339 15.4363 5.56037 13.8982 5.20844V5.20844Z" fill="currentColor"></path></svg> Reset</button><a href="https://codesandbox.io/api/v1/sandboxes/define?undefined&environment=create-react-app" rel="noreferrer noopener" target="_blank" title="Open in CodeSandbox" class="text-sm text-primary dark:text-primary-dark inline-flex items-center hover:text-link duration-100 ease-in transition mx-1 ms-2 md:ms-1"><svg width="1em" height="1em" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" class="inline mx-1 relative top-[1px]"><path d="M20.5001 2H15.5001C15.3675 2 15.2403 2.05268 15.1465 2.14645C15.0528 2.24021 15.0001 2.36739 15.0001 2.5V3.5C15.0001 3.63261 15.0528 3.75979 15.1465 3.85355C15.2403 3.94732 15.3675 4 15.5001 4H18.5901L7.6501 14.94C7.60323 14.9865 7.56604 15.0418 7.54065 15.1027C7.51527 15.1636 7.5022 15.229 7.5022 15.295C7.5022 15.361 7.51527 15.4264 7.54065 15.4873C7.56604 15.5482 7.60323 15.6035 7.6501 15.65L8.3501 16.35C8.39658 16.3969 8.45188 16.4341 8.51281 16.4594C8.57374 16.4848 8.63909 16.4979 8.7051 16.4979C8.7711 16.4979 8.83646 16.4848 8.89738 16.4594C8.95831 16.4341 9.01362 16.3969 9.0601 16.35L20.0001 5.41V8.5C20.0001 8.63261 20.0528 8.75979 20.1465 8.85355C20.2403 8.94732 20.3675 9 20.5001 9H21.5001C21.6327 9 21.7599 8.94732 21.8537 8.85355C21.9474 8.75979 22.0001 8.63261 22.0001 8.5V3.5C22.0001 3.10218 21.8421 2.72064 21.5608 2.43934C21.2795 2.15804 20.8979 2 20.5001 2V2Z" fill="currentColor"></path><path d="M21.5 13H20.5C20.3674 13 20.2402 13.0527 20.1464 13.1464C20.0527 13.2402 20 13.3674 20 13.5V20H4V4H10.5C10.6326 4 10.7598 3.94732 10.8536 3.85355C10.9473 3.75979 11 3.63261 11 3.5V2.5C11 2.36739 10.9473 2.24021 10.8536 2.14645C10.7598 2.05268 10.6326 2 10.5 2H3.5C3.10218 2 2.72064 2.15804 2.43934 2.43934C2.15804 2.72064 2 3.10218 2 3.5V20.5C2 20.8978 2.15804 21.2794 2.43934 21.5607C2.72064 21.842 3.10218 22 3.5 22H20.5C20.8978 22 21.2794 21.842 21.5607 21.5607C21.842 21.2794 22 20.8978 22 20.5V13.5C22 13.3674 21.9473 13.2402 21.8536 13.1464C21.7598 13.0527 21.6326 13 21.5 13Z" fill="currentColor"></path></svg><span class="hidden md:block">Fork</span></a></div></div><div class=" sp-layout"><div class=" sp-editor sp-stack"><div class=" sp-code-editor"><div aria-autocomplete="list" aria-label="Code Editor for App.js" aria-multiline="true" class="sp-pristine sp-javascript sp-cm" role="textbox" tabindex="0" translate="no"><pre class=" sp-pre-placeholder" style="margin-left:var(--sp-space-11)"><span class="sp-syntax-keyword">import</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-plain">useState</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'react'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">import</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-plain">places</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./data.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">import</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-plain">getImageUrl</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">from</span> <span class="sp-syntax-string">'./utils.js'</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">export</span> <span class="sp-syntax-keyword">default</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">App</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">const</span> <span class="sp-syntax-punctuation">[</span><span class="sp-syntax-plain">isLarge</span><span class="sp-syntax-punctuation">,</span> <span class="sp-syntax-plain">setIsLarge</span><span class="sp-syntax-punctuation">]</span> = <span class="sp-syntax-definition">useState</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-static">false</span><span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">const</span> <span class="sp-syntax-plain">imageSize</span> = <span class="sp-syntax-plain">isLarge</span> ? <span class="sp-syntax-static">150</span> : <span class="sp-syntax-static">100</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">label</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">input</span> <span class="sp-syntax-property">type</span>=<span class="sp-syntax-string">"checkbox"</span> <span class="sp-syntax-property">checked</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">isLarge</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-property">onChange</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">e</span> <span class="sp-syntax-punctuation">=></span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-definition">setIsLarge</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-plain">e</span>.<span class="sp-syntax-property">target</span>.<span class="sp-syntax-property">checked</span><span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-punctuation">/></span> Use large images <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">label</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">hr</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">List</span> <span class="sp-syntax-property">imageSize</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">imageSize</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">List</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-property">imageSize</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">const</span> <span class="sp-syntax-plain">listItems</span> = <span class="sp-syntax-plain">places</span>.<span class="sp-syntax-property">map</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-plain">place</span> <span class="sp-syntax-punctuation">=></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">li</span> <span class="sp-syntax-property">key</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">place</span>.<span class="sp-syntax-property">id</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">Place</span> <span class="sp-syntax-property">place</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">place</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-property">imageSize</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">imageSize</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">li</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">ul</span><span class="sp-syntax-punctuation">></span><span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">listItems</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">ul</span><span class="sp-syntax-punctuation">></span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">Place</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-property">place</span><span class="sp-syntax-punctuation">,</span> <span class="sp-syntax-property">imageSize</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-definition">PlaceImage</span> <span class="sp-syntax-property">place</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">place</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-property">imageSize</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">imageSize</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">p</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">b</span><span class="sp-syntax-punctuation">></span><span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">place</span>.<span class="sp-syntax-property">name</span><span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">b</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">{</span><span class="sp-syntax-string">': '</span> + <span class="sp-syntax-plain">place</span>.<span class="sp-syntax-property">description</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-tag">p</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation"></</span><span class="sp-syntax-punctuation">></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-keyword">function</span> <span class="sp-syntax-definition">PlaceImage</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-property">place</span><span class="sp-syntax-punctuation">,</span> <span class="sp-syntax-property">imageSize</span> <span class="sp-syntax-punctuation">}</span><span class="sp-syntax-punctuation">)</span> <span class="sp-syntax-punctuation">{</span> <span class="sp-syntax-keyword">return</span> <span class="sp-syntax-punctuation">(</span> <span class="sp-syntax-punctuation"><</span><span class="sp-syntax-tag">img</span> <span class="sp-syntax-property">src</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-definition">getImageUrl</span><span class="sp-syntax-punctuation">(</span><span class="sp-syntax-plain">place</span><span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-property">alt</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">place</span>.<span class="sp-syntax-property">name</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-property">width</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">imageSize</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-property">height</span>=<span class="sp-syntax-punctuation">{</span><span class="sp-syntax-plain">imageSize</span><span class="sp-syntax-punctuation">}</span> <span class="sp-syntax-punctuation">/></span> <span class="sp-syntax-punctuation">)</span><span class="sp-syntax-punctuation">;</span> <span class="sp-syntax-punctuation">}</span> </pre></div></div></div><div class=" order-last xl:order-2 sp-stack"><div class="p-0 sm:p-2 md:p-4 lg:p-8 bg-card dark:bg-wash-dark h-full relative md:rounded-b-lg lg:rounded-b-none"><div style="position:relative"><iframe class="rounded-t-none bg-white md:shadow-md sm:rounded-lg w-full max-w-full transition-opacity absolute opacity-0 pointer-events-none duration-75" title="Sandbox Preview" style="height:15px;z-index:-1"></iframe></div></div></div><button translate="yes" class="sandpack-expand flex text-base justify-between dark:border-card-dark bg-wash dark:bg-card-dark items-center z-10 p-1 w-full order-2 xl:order-last border-b-1 relative top-0"><span class="flex p-2 focus:outline-none text-primary dark:text-primary-dark leading-[20px]"><svg class="rotate-0 inline me-1.5 text-xl" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg>Show more</span></button></div></div></div></div><!--/$--></div><div class="flex justify-between items-center mt-4"><button class="me-2 text-base leading-tight font-bold rounded-full py-2 px-4 focus:outline focus:outline-offset-2 focus:outline-link dark:focus:outline-link-dark inline-flex items-center my-1 bg-transparent text-primary dark:text-primary-dark active:text-primary shadow-secondary-button-stroke dark:shadow-secondary-button-stroke-dark hover:bg-gray-40/5 active:bg-gray-40/10 hover:dark:bg-gray-60/5 active:dark:bg-gray-60/10"><svg class="inline me-1.5" width="0.75em" height="0.75em" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg"><path d="M2.21908 8.74479V12.7448H0.885742V0.078125H7.14041C7.26418 0.0781911 7.3855 0.112714 7.49076 0.177827C7.59602 0.242939 7.68108 0.336071 7.73641 0.446792L8.21908 1.41146H12.2191C12.3959 1.41146 12.5655 1.4817 12.6905 1.60672C12.8155 1.73174 12.8857 1.90131 12.8857 2.07812V9.41146C12.8857 9.58827 12.8155 9.75784 12.6905 9.88286C12.5655 10.0079 12.3959 10.0781 12.2191 10.0781H7.96441C7.84063 10.0781 7.71932 10.0435 7.61406 9.97842C7.50879 9.91331 7.42374 9.82018 7.36841 9.70946L6.88574 8.74479H2.21908ZM2.21908 1.41146V7.41146H7.70974L8.37641 8.74479H11.5524V2.74479H7.39508L6.72841 1.41146H2.21908Z" fill="currentColor"></path></svg> <!-- -->Show solution</button></div></div></div></div></div><div class="grid grid-cols-1 gap-4 py-4 mx-auto max-w-7xl md:grid-cols-2 md:py-12"><a class="flex gap-x-4 md:gap-x-6 items-center w-full md:min-w-80 md:w-fit md:max-w-md px-4 md:px-5 py-6 border-2 border-transparent text-base leading-base text-link dark:text-link-dark rounded-lg group focus:text-link dark:focus:text-link-dark focus:bg-highlight focus:border-link dark:focus:bg-highlight-dark dark:focus:border-link-dark focus:border-opacity-100 focus:border-2 focus:ring-1 focus:ring-offset-4 focus:ring-blue-40 active:ring-0 active:ring-offset-0 hover:bg-gray-5 dark:hover:bg-gray-80" href="/learn/extracting-state-logic-into-a-reducer"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" class="duration-100 ease-in transition rotate-90 rtl:-rotate-90 inline text-tertiary dark:text-tertiary-dark group-focus:text-link dark:group-focus:text-link-dark" style="min-width:20px;min-height:20px"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg><div class="flex flex-col overflow-hidden"><span class="text-sm font-bold tracking-wide no-underline uppercase text-secondary dark:text-secondary-dark group-focus:text-link dark:group-focus:text-link-dark group-focus:text-opacity-100">Previous</span><span class="text-lg break-words group-hover:underline">Extracting State Logic into a Reducer</span></div></a><a class="flex gap-x-4 md:gap-x-6 items-center w-full md:min-w-80 md:w-fit md:max-w-md px-4 md:px-5 py-6 border-2 border-transparent text-base leading-base text-link dark:text-link-dark rounded-lg group focus:text-link dark:focus:text-link-dark focus:bg-highlight focus:border-link dark:focus:bg-highlight-dark dark:focus:border-link-dark focus:border-opacity-100 focus:border-2 focus:ring-1 focus:ring-offset-4 focus:ring-blue-40 active:ring-0 active:ring-offset-0 hover:bg-gray-5 dark:hover:bg-gray-80 flex-row-reverse justify-self-end text-end" href="/learn/scaling-up-with-reducer-and-context"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" class="duration-100 ease-in transition -rotate-90 rtl:rotate-90 inline text-tertiary dark:text-tertiary-dark group-focus:text-link dark:group-focus:text-link-dark" style="min-width:20px;min-height:20px"><g fill="none" fill-rule="evenodd" transform="translate(-446 -398)"><path fill="currentColor" fill-rule="nonzero" d="M95.8838835,240.366117 C95.3957281,239.877961 94.6042719,239.877961 94.1161165,240.366117 C93.6279612,240.854272 93.6279612,241.645728 94.1161165,242.133883 L98.6161165,246.633883 C99.1042719,247.122039 99.8957281,247.122039 100.383883,246.633883 L104.883883,242.133883 C105.372039,241.645728 105.372039,240.854272 104.883883,240.366117 C104.395728,239.877961 103.604272,239.877961 103.116117,240.366117 L99.5,243.982233 L95.8838835,240.366117 Z" transform="translate(356.5 164.5)"></path><polygon points="446 418 466 418 466 398 446 398"></polygon></g></svg><div class="flex flex-col overflow-hidden"><span class="text-sm font-bold tracking-wide no-underline uppercase text-secondary dark:text-secondary-dark group-focus:text-link dark:group-focus:text-link-dark group-focus:text-opacity-100">Next</span><span class="text-lg break-words group-hover:underline">Scaling Up with Reducer and Context</span></div></a></div></div></div></article><div class="self-stretch w-full"><div class="w-full px-5 pt-10 mx-auto sm:px-12 md:px-12 md:pt-12 lg:pt-10"><hr class="mx-auto max-w-7xl border-border dark:border-border-dark"/></div><div class="py-12 px-5 sm:px-12 md:px-12 sm:py-12 md:py-16 lg:py-14"><footer class="text-secondary dark:text-secondary-dark"><div class="grid grid-cols-2 md:grid-cols-3 xl:grid-cols-5 gap-x-12 gap-y-8 max-w-7xl mx-auto"><div class="col-span-2 md:col-span-1 justify-items-start mt-3.5"><a href="https://opensource.fb.com/" target="_blank" rel="noopener" aria-label="Meta Open Source"><div><svg width="160" height="19" viewBox="0 0 160 19" fill="none" xmlns="http://www.w3.org/2000/svg" class="text-primary dark:text-primary-dark"><path d="M22.0605 3.62598H24.3349L28.202 10.6212L32.0691 3.62598H34.2942V15.1206H32.4387V6.31077L29.0476 12.4111H27.307L23.9162 6.31077V15.1206H22.0605V3.62598Z" fill="currentColor"></path><path d="M40.2785 15.3259C39.4191 15.3259 38.6638 15.1357 38.0124 14.7554C37.367 14.3812 36.8394 13.8336 36.4895 13.1747C36.1253 12.5015 35.9433 11.7297 35.9434 10.8594C35.9434 9.97825 36.1213 9.19824 36.4771 8.5194C36.8329 7.84077 37.3269 7.30982 37.9592 6.92653C38.5913 6.54347 39.3179 6.3519 40.139 6.35181C40.9546 6.35181 41.6566 6.54477 42.2449 6.9307C42.8334 7.31658 43.2863 7.85713 43.6038 8.55232C43.9212 9.24748 44.08 10.063 44.0801 10.9989V11.5081H37.7826C37.8975 12.2088 38.1808 12.7602 38.6323 13.1625C39.0839 13.5648 39.6546 13.7659 40.3443 13.766C40.8971 13.766 41.3733 13.6839 41.7729 13.5196C42.1723 13.3554 42.5473 13.1063 42.8977 12.7724L43.8831 13.9794C42.9031 14.8771 41.7016 15.326 40.2785 15.3259ZM41.6334 8.50718C41.2447 8.11027 40.7356 7.91184 40.1062 7.91189C39.4931 7.91189 38.9799 8.11439 38.5667 8.51941C38.1533 8.92464 37.8919 9.46931 37.7826 10.1534H42.2984C42.2436 9.45273 42.0219 8.90398 41.6334 8.50716V8.50718Z" fill="currentColor"></path><path d="M46.3308 8.07609H44.623V6.55715H46.3308V4.04468H48.1209V6.55715H50.7153V8.07609H48.1209V11.9267C48.1209 12.5672 48.2303 13.0243 48.4492 13.298C48.6682 13.5717 49.0431 13.7086 49.5741 13.7084C49.7742 13.7102 49.9743 13.7006 50.1734 13.6797C50.3376 13.6606 50.5183 13.6346 50.7153 13.6017V15.1043C50.4905 15.1692 50.2614 15.2186 50.0297 15.252C49.7647 15.2911 49.4971 15.3103 49.2292 15.3095C47.2969 15.3095 46.3308 14.2531 46.3308 12.1403L46.3308 8.07609Z" fill="currentColor"></path><path d="M60.0415 15.1207H58.2844V13.9219C57.9815 14.3629 57.572 14.7202 57.094 14.9606C56.6123 15.204 56.0649 15.3258 55.4519 15.3259C54.6966 15.3259 54.0274 15.133 53.4444 14.7472C52.8614 14.3611 52.4029 13.8302 52.0692 13.1543C51.7353 12.4784 51.5684 11.7052 51.5684 10.8348C51.5684 9.95904 51.738 9.1845 52.0774 8.5112C52.4167 7.83795 52.8861 7.30972 53.4855 6.92653C54.0847 6.54347 54.773 6.3519 55.5503 6.35181C56.1361 6.35181 56.6616 6.46538 57.1269 6.69253C57.5858 6.91465 57.9833 7.24591 58.2844 7.65731V6.55718H60.0415V15.1207ZM58.2516 9.55395C58.06 9.06686 57.7576 8.68232 57.3444 8.40033C56.9311 8.11861 56.4535 7.97771 55.9116 7.97762C55.1452 7.97762 54.5349 8.23487 54.0807 8.74939C53.6264 9.2639 53.3993 9.95905 53.3993 10.8349C53.3993 11.7162 53.6182 12.4141 54.0561 12.9285C54.4939 13.443 55.0877 13.7003 55.8377 13.7003C56.3906 13.7003 56.8833 13.5579 57.3156 13.2733C57.7405 12.9979 58.068 12.5957 58.2516 12.1238V9.55395Z" fill="currentColor"></path><path d="M64.4113 11.7585C64.1266 11.0332 63.9843 10.2382 63.9844 9.3733C63.9844 8.50853 64.1267 7.71351 64.4113 6.98824C64.6823 6.28392 65.0929 5.6416 65.6182 5.09981C66.1399 4.56496 66.7659 4.14298 67.4573 3.86003C68.1634 3.56716 68.9379 3.4207 69.7808 3.42065C70.6238 3.42065 71.3984 3.56711 72.1045 3.86003C72.796 4.14302 73.422 4.56499 73.9437 5.09981C74.4689 5.64171 74.8795 6.284 75.1507 6.98824C75.4351 7.71351 75.5774 8.50853 75.5776 9.3733C75.5776 10.2382 75.4353 11.0333 75.1507 11.7585C74.8795 12.4627 74.4689 13.105 73.9437 13.6469C73.422 14.1818 72.796 14.6038 72.1045 14.8867C71.3984 15.1794 70.6239 15.3259 69.7808 15.3259C68.938 15.3259 68.1635 15.1795 67.4573 14.8867C66.7658 14.6038 66.1399 14.1818 65.6182 13.6469C65.0929 13.1051 64.6823 12.4628 64.4113 11.7585ZM73.6152 9.3733C73.6152 8.54697 73.451 7.81763 73.1226 7.18529C72.7942 6.55303 72.3413 6.05904 71.7637 5.70331C71.1862 5.34753 70.5252 5.16962 69.7808 5.16958C69.0365 5.16958 68.3756 5.34749 67.7981 5.70331C67.2205 6.05909 66.7676 6.55308 66.4392 7.18529C66.1108 7.81741 65.9466 8.54674 65.9466 9.3733C65.9466 10.1999 66.1108 10.9293 66.4392 11.5615C66.7677 12.1937 67.2206 12.6877 67.7981 13.0434C68.3755 13.3993 69.0364 13.5773 69.7808 13.5772C70.5252 13.5772 71.1862 13.3993 71.7637 13.0434C72.3413 12.6877 72.7942 12.1937 73.1226 11.5615C73.451 10.9292 73.6152 10.1998 73.6152 9.3733V9.3733Z" fill="currentColor"></path><path d="M77.2188 6.55718H78.9839V7.74763C79.2856 7.30796 79.6938 6.95201 80.1705 6.71309C80.6492 6.47237 81.1952 6.35194 81.8084 6.35181C82.5637 6.35181 83.2342 6.54477 83.8199 6.9307C84.4056 7.31658 84.8641 7.84615 85.1952 8.5194C85.5263 9.19264 85.6919 9.96719 85.6919 10.843C85.6919 11.7133 85.5223 12.4865 85.1829 13.1625C84.8436 13.8386 84.3742 14.3681 83.7747 14.7512C83.1755 15.1343 82.4873 15.3258 81.71 15.3259C81.1353 15.3259 80.618 15.2165 80.1581 14.9976C79.7045 14.7837 79.31 14.4624 79.0087 14.0616V18.569H77.2188V6.55718ZM79.9159 13.2774C80.3291 13.5594 80.8067 13.7004 81.3487 13.7003C82.1148 13.7003 82.7251 13.443 83.1796 12.9285C83.6339 12.414 83.861 11.7188 83.861 10.843C83.861 9.96172 83.6421 9.26383 83.2042 8.74937C82.7662 8.23486 82.1723 7.9776 81.4226 7.9776C80.8697 7.9776 80.377 8.11989 79.9447 8.40448C79.5197 8.67987 79.1923 9.08202 79.0087 9.55393V12.1238C79.2002 12.611 79.5026 12.9956 79.9159 13.2774Z" fill="currentColor"></path><path d="M91.177 15.3259C90.3176 15.3259 89.5622 15.1357 88.9109 14.7554C88.2654 14.3812 87.7377 13.8336 87.3878 13.1747C87.0236 12.5015 86.8417 11.7297 86.8418 10.8594C86.8418 9.97825 87.0197 9.19824 87.3754 8.5194C87.7312 7.84077 88.2252 7.30982 88.8574 6.92653C89.4896 6.54347 90.2163 6.3519 91.0373 6.35181C91.8528 6.35181 92.5548 6.54477 93.1434 6.9307C93.7317 7.31658 94.1846 7.85713 94.5022 8.55232C94.8196 9.24748 94.9782 10.063 94.9783 10.9989V11.5081H88.6809C88.7958 12.2088 89.0791 12.7602 89.5308 13.1625C89.9824 13.5648 90.553 13.7659 91.2426 13.766C91.7954 13.766 92.2716 13.6839 92.6712 13.5196C93.0708 13.3554 93.4457 13.1063 93.796 12.7724L94.7812 13.9794C93.8014 14.8771 92.6 15.326 91.177 15.3259ZM92.5315 8.50718C92.1428 8.11027 91.6338 7.91184 91.0044 7.91189C90.3914 7.91189 89.8782 8.11439 89.465 8.51941C89.0517 8.92464 88.7903 9.46931 88.6809 10.1534H93.1966C93.1419 9.45273 92.9202 8.90398 92.5315 8.50716V8.50718Z" fill="currentColor"></path><path d="M96.4883 6.55718H98.2536V7.80515C98.9158 6.83621 99.8381 6.35176 101.021 6.35181C102.039 6.35181 102.821 6.66928 103.369 7.30422C103.916 7.93929 104.19 8.84793 104.19 10.0301V15.1207H102.4V10.2436C102.4 9.44454 102.258 8.85615 101.973 8.47842C101.688 8.10074 101.242 7.9119 100.635 7.9119C100.104 7.9119 99.6356 8.04872 99.2307 8.32238C98.8255 8.59617 98.508 8.97932 98.2783 9.47183V15.1207H96.4883L96.4883 6.55718Z" fill="currentColor"></path><path d="M116.875 11.8694C116.875 12.9586 116.499 13.8071 115.746 14.4147C114.994 15.0222 113.914 15.3259 112.507 15.3259C111.451 15.3259 110.511 15.1262 109.687 14.7266C108.863 14.3272 108.221 13.7469 107.762 12.9859L109.157 11.8858C109.54 12.466 110.019 12.8971 110.594 13.1789C111.169 13.4609 111.829 13.6018 112.573 13.6018C113.323 13.6018 113.906 13.4594 114.322 13.1747C114.738 12.8902 114.946 12.5043 114.946 12.0171C114.946 11.5957 114.801 11.2468 114.511 10.9703C114.221 10.694 113.728 10.4846 113.033 10.3422L111.309 9.98094C109.196 9.54304 108.139 8.47567 108.139 6.77883C108.139 6.10558 108.315 5.51714 108.665 5.01352C109.015 4.51002 109.512 4.11867 110.155 3.83947C110.798 3.56031 111.552 3.4207 112.417 3.42065C114.338 3.42065 115.775 4.16509 116.727 5.65397L115.315 6.66391C114.976 6.14939 114.572 5.76759 114.104 5.51849C113.636 5.26943 113.068 5.14492 112.401 5.14497C111.662 5.14497 111.088 5.28041 110.681 5.55128C110.273 5.82225 110.069 6.20952 110.069 6.7131C110.069 7.09629 110.202 7.40557 110.467 7.64091C110.732 7.87626 111.196 8.0651 111.859 8.20744L113.583 8.56874C115.778 9.02855 116.875 10.1288 116.875 11.8694Z" fill="currentColor"></path><path d="M118.677 13.1831C118.308 12.5097 118.123 11.7297 118.123 10.843C118.123 9.95083 118.308 9.16809 118.677 8.4948C119.034 7.83483 119.569 7.28851 120.221 6.91833C120.88 6.54065 121.645 6.3518 122.516 6.35181C123.386 6.35181 124.151 6.54065 124.81 6.91833C125.463 7.28862 125.998 7.83491 126.354 8.4948C126.724 9.16805 126.908 9.95079 126.908 10.843C126.908 11.7297 126.724 12.5097 126.354 13.1831C125.998 13.8429 125.463 14.3892 124.81 14.7594C124.151 15.1371 123.386 15.3259 122.516 15.3259C121.651 15.3259 120.887 15.1371 120.225 14.7594C119.571 14.3902 119.034 13.8438 118.677 13.1831ZM125.077 10.843C125.077 9.98377 124.843 9.29408 124.375 8.77396C123.907 8.25393 123.288 7.99394 122.516 7.994C121.744 7.994 121.124 8.25398 120.656 8.77396C120.188 9.29399 119.954 9.98368 119.954 10.843C119.954 11.6969 120.188 12.3839 120.656 12.9039C121.124 13.4239 121.744 13.6839 122.516 13.6839C123.288 13.6839 123.907 13.4239 124.375 12.9039C124.843 12.3839 125.077 11.6969 125.077 10.843Z" fill="currentColor"></path><path d="M135.907 15.1206H134.141V13.8891C133.484 14.847 132.576 15.3259 131.415 15.3259C130.408 15.3259 129.635 15.0084 129.096 14.3735C128.557 13.7385 128.287 12.8299 128.287 11.6475V6.55713H130.077V11.4341C130.077 12.2278 130.217 12.8148 130.496 13.1953C130.775 13.5758 131.213 13.766 131.809 13.7659C132.324 13.7659 132.781 13.6305 133.18 13.3595C133.58 13.0885 133.892 12.7095 134.116 12.2223V6.55713H135.907L135.907 15.1206Z" fill="currentColor"></path><path d="M137.877 6.55733H139.642V7.8709C140.195 6.91311 140.95 6.43417 141.908 6.43408C142.22 6.43408 142.475 6.46146 142.672 6.5162V8.16659C142.403 8.12858 142.131 8.10936 141.859 8.10907C140.786 8.10907 140.055 8.59074 139.667 9.55408V15.1208H137.877L137.877 6.55733Z" fill="currentColor"></path><path d="M143.737 8.49063C144.079 7.83229 144.601 7.28535 145.244 6.9143C145.889 6.53944 146.645 6.35194 147.51 6.35181C149.119 6.35181 150.318 6.98952 151.106 8.26496L149.71 9.20918C149.431 8.78768 149.119 8.47975 148.774 8.2854C148.429 8.09118 148.013 7.99405 147.526 7.994C146.782 7.994 146.18 8.25534 145.72 8.778C145.26 9.30085 145.03 9.98647 145.03 10.8348C145.03 11.727 145.255 12.4249 145.703 12.9285C146.152 13.4321 146.785 13.6839 147.6 13.6839C148.034 13.6874 148.463 13.5845 148.848 13.3841C149.218 13.1962 149.536 12.9215 149.776 12.5836L151.024 13.6839C150.186 14.7786 149.031 15.326 147.559 15.3259C146.678 15.3259 145.91 15.1412 145.256 14.7718C144.609 14.4099 144.081 13.8679 143.737 13.2117C143.378 12.5413 143.199 11.7544 143.199 10.8512C143.199 9.95352 143.378 9.16666 143.737 8.49063Z" fill="currentColor"></path><path d="M156.195 15.3259C155.335 15.3259 154.58 15.1357 153.928 14.7554C153.283 14.3812 152.755 13.8336 152.405 13.1747C152.041 12.5015 151.859 11.7297 151.859 10.8594C151.859 9.97825 152.037 9.19824 152.393 8.5194C152.749 7.84077 153.243 7.30982 153.875 6.92653C154.507 6.54347 155.234 6.3519 156.055 6.35181C156.87 6.35181 157.572 6.54477 158.161 6.9307C158.749 7.31658 159.202 7.85713 159.52 8.55232C159.837 9.24748 159.996 10.063 159.996 10.9989V11.5081H153.698C153.814 12.2088 154.097 12.7602 154.548 13.1625C155 13.5648 155.571 13.7659 156.26 13.766C156.813 13.766 157.289 13.6839 157.689 13.5196C158.088 13.3554 158.463 13.1063 158.814 12.7724L159.799 13.9794C158.819 14.8771 157.618 15.326 156.195 15.3259ZM157.549 8.50718C157.161 8.11027 156.651 7.91184 156.022 7.91189C155.409 7.91189 154.896 8.11439 154.483 8.51941C154.069 8.92464 153.808 9.46931 153.698 10.1534H158.214C158.159 9.45273 157.938 8.90398 157.549 8.50716V8.50718Z" fill="currentColor"></path><path d="M5.26022 3.23511C5.25436 3.23511 5.24854 3.23513 5.24268 3.23516L5.21875 5.21191C5.22423 5.21185 5.22969 5.2118 5.23518 5.2118C6.53629 5.2118 7.54551 6.23768 9.73906 9.93252L9.87278 10.1575L9.88153 10.1722L11.1094 8.32979L11.1009 8.31556C10.812 7.84556 10.5344 7.41312 10.2681 7.01826C9.95934 6.56075 9.66404 6.15204 9.37746 5.78713C7.92635 3.93952 6.71249 3.23511 5.26022 3.23511Z" fill="url(#paint0_linear_627_396207)"></path><path d="M5.24198 3.23516C3.78266 3.24267 2.49251 4.18633 1.56092 5.63032C1.55819 5.63455 1.55546 5.63879 1.55273 5.64302L3.26279 6.57377C3.26556 6.56957 3.26836 6.56535 3.27114 6.56117C3.81514 5.7421 4.49212 5.21969 5.21805 5.21191C5.22353 5.21185 5.229 5.21181 5.23448 5.21181L5.2595 3.23511C5.25364 3.23511 5.24783 3.23513 5.24198 3.23516Z" fill="url(#paint1_linear_627_396207)"></path><path d="M1.56088 5.63037C1.55816 5.6346 1.55543 5.63884 1.5527 5.64307C0.94054 6.596 0.484192 7.76537 0.237567 9.02689C0.236499 9.03235 0.235435 9.03781 0.234375 9.04329L2.15555 9.49659C2.15655 9.49111 2.15756 9.48562 2.15857 9.48015C2.36393 8.37149 2.75488 7.34323 3.26274 6.57382C3.26552 6.56962 3.26831 6.5654 3.2711 6.56122L1.56088 5.63037Z" fill="url(#paint2_linear_627_396207)"></path><path d="M2.15979 9.48011L0.238778 9.02686C0.23771 9.03231 0.236646 9.03778 0.235585 9.04325C0.101104 9.73704 0.0326863 10.442 0.03125 11.1487C0.03125 11.1544 0.03125 11.1601 0.03125 11.1658L2.00149 11.3421C2.00133 11.3364 2.00117 11.3307 2.00103 11.3249C2.00007 11.284 1.99958 11.2424 1.99956 11.2003C2.00054 10.6288 2.05316 10.0586 2.15678 9.49655C2.15776 9.49107 2.15878 9.48558 2.15979 9.48011Z" fill="url(#paint3_linear_627_396207)"></path><path d="M2.06148 11.9568C2.02614 11.7537 2.00611 11.5482 2.00156 11.3421C2.0014 11.3363 2.00124 11.3307 2.0011 11.3249L0.031335 11.1487C0.031335 11.1544 0.031335 11.1601 0.031335 11.1658V11.1669C0.0292535 11.5801 0.0653944 11.9925 0.139296 12.399C0.140327 12.4045 0.14134 12.4099 0.142386 12.4154L2.06448 11.9732C2.06345 11.9678 2.06247 11.9623 2.06148 11.9568Z" fill="url(#paint4_linear_627_396207)"></path><path d="M2.50976 12.9765C2.29536 12.7425 2.14362 12.405 2.06386 11.9732C2.06285 11.9678 2.06187 11.9623 2.06088 11.9568L0.138672 12.399C0.139703 12.4045 0.140716 12.4099 0.141762 12.4154C0.28705 13.1782 0.571996 13.8139 0.980035 14.2949C0.983663 14.2991 0.987305 14.3034 0.990959 14.3077L2.52121 12.9888C2.51738 12.9848 2.51355 12.9807 2.50976 12.9765Z" fill="url(#paint5_linear_627_396207)"></path><path d="M8.20487 7.50854C7.04655 9.28523 6.34486 10.3996 6.34486 10.3996C4.80187 12.8183 4.26806 13.3604 3.409 13.3604C3.05054 13.3604 2.75107 13.2328 2.52164 12.9888C2.51782 12.9848 2.51398 12.9807 2.51019 12.9765L0.980469 14.2949C0.984097 14.2991 0.987738 14.3034 0.991392 14.3077C1.5548 14.9644 2.35009 15.3288 3.33393 15.3288C4.82242 15.3288 5.89296 14.6271 7.79608 11.3004C7.79608 11.3004 8.58943 9.8994 9.1352 8.93436C8.79713 8.38854 8.48948 7.91597 8.20487 7.50854Z" fill="#0082FB"></path><path d="M10.2688 4.7041C10.2649 4.70825 10.261 4.71248 10.2571 4.71664C9.94322 5.05596 9.64935 5.41323 9.37695 5.78663C9.66354 6.15154 9.95939 6.56105 10.2682 7.01855C10.6321 6.45684 10.9718 6.00189 11.3048 5.6532C11.3087 5.64907 11.3126 5.64504 11.3166 5.64094L10.2688 4.7041Z" fill="url(#paint6_linear_627_396207)"></path><path d="M15.8912 4.53007C15.0834 3.71396 14.1202 3.23511 13.0905 3.23511C12.0047 3.23511 11.0914 3.83012 10.2677 4.70423C10.2637 4.70837 10.2598 4.71261 10.2559 4.71677L11.3036 5.65333C11.3075 5.6492 11.3114 5.64517 11.3154 5.64107C11.858 5.0766 12.3832 4.79478 12.9654 4.79478H12.9654C13.592 4.79478 14.1786 5.08975 14.6867 5.60687C14.6906 5.61092 14.6946 5.61494 14.6986 5.61902L15.9032 4.54221C15.8992 4.53815 15.8952 4.53412 15.8912 4.53007Z" fill="#0082FB"></path><path d="M18.2273 10.8885C18.1821 8.26813 17.2651 5.92556 15.904 4.54218C15.9 4.53811 15.896 4.53408 15.892 4.53003L14.6875 5.60684C14.6915 5.61089 14.6954 5.61491 14.6994 5.61899C15.7233 6.67077 16.4256 8.6271 16.4895 10.8879C16.4897 10.8936 16.4898 10.8993 16.49 10.905L18.2276 10.9056C18.2275 10.8999 18.2274 10.8942 18.2273 10.8885Z" fill="url(#paint7_linear_627_396207)"></path><path d="M18.2262 10.9056C18.2261 10.8999 18.226 10.8942 18.2259 10.8885L16.4881 10.8879C16.4883 10.8936 16.4884 10.8993 16.4886 10.905C16.4914 11.0111 16.4928 11.1179 16.4928 11.2253C16.4928 11.8417 16.4007 12.34 16.2135 12.6997C16.2107 12.705 16.2079 12.7104 16.2051 12.7157L17.5007 14.0632C17.504 14.0583 17.5071 14.0535 17.5103 14.0486C17.9807 13.3228 18.2276 12.3145 18.2276 11.0918C18.2276 11.0296 18.2272 10.9675 18.2262 10.9056Z" fill="url(#paint8_linear_627_396207)"></path><path d="M16.2158 12.6997C16.213 12.705 16.2102 12.7104 16.2074 12.7157C16.0453 13.0189 15.814 13.2212 15.5117 13.3096L16.1024 15.1711C16.1806 15.1445 16.2567 15.1147 16.3308 15.0816C16.353 15.0718 16.3749 15.0616 16.3967 15.0512C16.4092 15.0452 16.4217 15.0391 16.4341 15.0329C16.8281 14.8341 17.1672 14.5417 17.4217 14.1812C17.438 14.1587 17.4541 14.1359 17.47 14.1127C17.4811 14.0963 17.4921 14.0798 17.5031 14.0632C17.5063 14.0583 17.5094 14.0534 17.5126 14.0485L16.2158 12.6997Z" fill="url(#paint9_linear_627_396207)"></path><path d="M15.1349 13.3603C14.9481 13.3648 14.7626 13.3286 14.5911 13.2544L13.9863 15.1602C14.3262 15.2763 14.6889 15.3287 15.0932 15.3287C15.4415 15.3319 15.7878 15.2768 16.1179 15.1654L15.5273 13.3046C15.4001 13.3427 15.2678 13.3615 15.1349 13.3603Z" fill="url(#paint10_linear_627_396207)"></path><path d="M13.9243 12.7085C13.9206 12.7042 13.9168 12.6999 13.9131 12.6956L12.5215 14.1429C12.5254 14.147 12.5293 14.1512 12.5332 14.1553C13.0167 14.6706 13.4784 14.9903 14.0021 15.1657L14.6064 13.2613C14.3857 13.1665 14.1723 12.9947 13.9243 12.7085Z" fill="url(#paint11_linear_627_396207)"></path><path d="M13.9142 12.6956C13.4968 12.2101 12.9804 11.4019 12.1682 10.095L11.1097 8.32966L11.1012 8.31543L9.87305 10.1573L9.8818 10.172L10.6318 11.4337C11.3588 12.6503 11.9511 13.5304 12.5226 14.1428C12.5265 14.147 12.5304 14.1512 12.5343 14.1553L13.9254 12.7085C13.9217 12.7042 13.918 12.6999 13.9142 12.6956Z" fill="url(#paint12_linear_627_396207)"></path><defs><linearGradient id="paint0_linear_627_396207" x1="10.2933" y1="9.42293" x2="6.21654" y2="4.08099" gradientUnits="userSpaceOnUse"><stop offset="0.0006" stop-color="#0867DF"></stop><stop offset="0.4539" stop-color="#0668E1"></stop><stop offset="0.8591" stop-color="#0064E0"></stop></linearGradient><linearGradient id="paint1_linear_627_396207" x1="2.35598" y1="5.96246" x2="5.15084" y2="3.84063" gradientUnits="userSpaceOnUse"><stop offset="0.1323" stop-color="#0064DF"></stop><stop offset="0.9988" stop-color="#0064E0"></stop></linearGradient><linearGradient id="paint2_linear_627_396207" x1="1.17132" y1="9.07623" x2="2.29244" y2="6.25404" gradientUnits="userSpaceOnUse"><stop offset="0.0147" stop-color="#0072EC"></stop><stop offset="0.6881" stop-color="#0064DF"></stop></linearGradient><linearGradient id="paint3_linear_627_396207" x1="1.02028" y1="11.115" x2="1.15" y2="9.39138" gradientUnits="userSpaceOnUse"><stop offset="0.0731" stop-color="#007CF6"></stop><stop offset="0.9943" stop-color="#0072EC"></stop></linearGradient><linearGradient id="paint4_linear_627_396207" x1="1.0917" y1="12.0512" x2="0.998912" y2="11.3606" gradientUnits="userSpaceOnUse"><stop offset="0.0731" stop-color="#007FF9"></stop><stop offset="1" stop-color="#007CF6"></stop></linearGradient><linearGradient id="paint5_linear_627_396207" x1="1.03663" y1="12.2326" x2="1.61491" y2="13.4591" gradientUnits="userSpaceOnUse"><stop offset="0.0731" stop-color="#007FF9"></stop><stop offset="1" stop-color="#0082FB"></stop></linearGradient><linearGradient id="paint6_linear_627_396207" x1="9.92449" y1="6.29781" x2="10.689" y2="5.24046" gradientUnits="userSpaceOnUse"><stop offset="0.2799" stop-color="#007FF8"></stop><stop offset="0.9141" stop-color="#0082FB"></stop></linearGradient><linearGradient id="paint7_linear_627_396207" x1="15.7367" y1="4.92752" x2="17.3361" y2="10.8108" gradientUnits="userSpaceOnUse"><stop stop-color="#0082FB"></stop><stop offset="0.9995" stop-color="#0081FA"></stop></linearGradient><linearGradient id="paint8_linear_627_396207" x1="17.7208" y1="11.0359" x2="16.7086" y2="13.0813" gradientUnits="userSpaceOnUse"><stop offset="0.0619" stop-color="#0081FA"></stop><stop offset="1" stop-color="#0080F9"></stop></linearGradient><linearGradient id="paint9_linear_627_396207" x1="15.9065" y1="14.1657" x2="16.8526" y2="13.5213" gradientUnits="userSpaceOnUse"><stop stop-color="#027AF3"></stop><stop offset="1" stop-color="#0080F9"></stop></linearGradient><linearGradient id="paint10_linear_627_396207" x1="14.4218" y1="14.2915" x2="15.7366" y2="14.2915" gradientUnits="userSpaceOnUse"><stop stop-color="#0377EF"></stop><stop offset="0.9994" stop-color="#0279F1"></stop></linearGradient><linearGradient id="paint11_linear_627_396207" x1="13.2783" y1="13.5675" x2="14.2235" y2="14.1236" gradientUnits="userSpaceOnUse"><stop offset="0.0019" stop-color="#0471E9"></stop><stop offset="1" stop-color="#0377EF"></stop></linearGradient><linearGradient id="paint12_linear_627_396207" x1="10.3961" y1="9.46696" x2="13.424" y2="13.274" gradientUnits="userSpaceOnUse"><stop offset="0.2765" stop-color="#0867DF"></stop><stop offset="1" stop-color="#0471E9"></stop></linearGradient></defs></svg></div></a><div class="text-xs text-left rtl:text-right mt-2 pe-0.5" dir="ltr">Copyright © Meta Platforms, Inc</div><div class="uwu-visible text-xs cursor-pointer hover:text-link hover:dark:text-link-dark hover:underline">no uwu plz</div><div class="uwu-hidden text-xs cursor-pointer hover:text-link hover:dark:text-link-dark hover:underline">uwu?</div><div class="uwu-visible text-xs">Logo by<a href="https://twitter.com/sawaratsuki1004" target="_blank" rel="noopener" class="ms-1">@sawaratsuki1004</a></div></div><div class="flex flex-col"><div><a class="border-b inline-block border-transparent text-md text-secondary dark:text-secondary-dark my-2 font-bold hover:border-gray-10" href="/learn">Learn React</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/learn">Quick Start</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/learn/installation">Installation</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/learn/describing-the-ui">Describing the UI</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/learn/adding-interactivity">Adding Interactivity</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/learn/managing-state">Managing State</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/learn/escape-hatches">Escape Hatches</a></div></div><div class="flex flex-col"><div><a class="border-b inline-block border-transparent text-md text-secondary dark:text-secondary-dark my-2 font-bold hover:border-gray-10" href="/reference/react">API Reference</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/reference/react">React APIs</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/reference/react-dom">React DOM APIs</a></div></div><div class="md:col-start-2 xl:col-start-4 flex flex-col"><div><a class="border-b inline-block border-transparent text-md text-secondary dark:text-secondary-dark my-2 font-bold hover:border-gray-10" href="/community">Community</a></div><div><a href="https://github.com/facebook/react/blob/main/CODE_OF_CONDUCT.md" target="_blank" rel="noopener" class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10">Code of Conduct</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/community/team">Meet the Team</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/community/docs-contributors">Docs Contributors</a></div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/community/acknowledgements">Acknowledgements</a></div></div><div class="flex flex-col"><div class="border-b inline-block border-transparent text-md text-secondary dark:text-secondary-dark my-2 font-bold">More</div><div><a class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10" href="/blog">Blog</a></div><div><a href="https://reactnative.dev/" target="_blank" rel="noopener" class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10">React Native</a></div><div><a href="https://opensource.facebook.com/legal/privacy" target="_blank" rel="noopener" class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10">Privacy</a></div><div><a href="https://opensource.fb.com/legal/terms/" target="_blank" rel="noopener" class="border-b inline-block border-transparent text-sm text-primary dark:text-primary-dark hover:border-gray-10">Terms</a></div><div class="flex flex-row items-center mt-8 gap-x-2"><a href="https://www.facebook.com/react" target="_blank" rel="noopener" aria-label="React on Facebook" class="hover:text-primary dark:text-primary-dark"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="1.33em" height="1.33em" fill="currentColor"><path fill="none" d="M0 0h24v24H0z"></path><path d="M12 2C6.477 2 2 6.477 2 12c0 4.991 3.657 9.128 8.438 9.879V14.89h-2.54V12h2.54V9.797c0-2.506 1.492-3.89 3.777-3.89 1.094 0 2.238.195 2.238.195v2.46h-1.26c-1.243 0-1.63.771-1.63 1.562V12h2.773l-.443 2.89h-2.33v6.989C18.343 21.129 22 16.99 22 12c0-5.523-4.477-10-10-10z"></path></svg></a><a href="https://twitter.com/reactjs" target="_blank" rel="noopener" aria-label="React on Twitter" class="hover:text-primary dark:text-primary-dark"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" height="1.30em" width="1.30em" fill="currentColor"><path fill="none" d="M0 0h24v24H0z"></path><path d="M389.2 48h70.6L305.6 224.2 487 464H345L233.7 318.6 106.5 464H35.8L200.7 275.5 26.8 48H172.4L272.9 180.9 389.2 48zM364.4 421.8h39.1L151.1 88h-42L364.4 421.8z"></path></svg></a><a href="https://bsky.app/profile/react.dev" target="_blank" rel="noopener" aria-label="React on Bluesky" class="hover:text-primary dark:text-primary-dark"><svg aria-label="Bluesky" viewBox="0 0 16 16" height="1.25em" width="1.25em" fill="currentColor" xmlns="http://www.w3.org/2000/svg"><path class="x19hqcy" d="M3.468 1.948C5.303 3.325 7.276 6.118 8 7.616c.725-1.498 2.697-4.29 4.532-5.668C13.855.955 16 .186 16 2.632c0 .489-.28 4.105-.444 4.692-.572 2.04-2.653 2.561-4.504 2.246 3.236.551 4.06 2.375 2.281 4.2-3.376 3.464-4.852-.87-5.23-1.98-.07-.204-.103-.3-.103-.218 0-.081-.033.014-.102.218-.379 1.11-1.855 5.444-5.231 1.98-1.778-1.825-.955-3.65 2.28-4.2-1.85.315-3.932-.205-4.503-2.246C.28 6.737 0 3.12 0 2.632 0 .186 2.145.955 3.468 1.948Z"></path></svg></a><a href="https://github.com/facebook/react" target="_blank" rel="noopener" aria-label="React on Github" class="hover:text-primary dark:text-primary-dark"><svg xmlns="http://www.w3.org/2000/svg" width="1.5em" height="1.5em" viewBox="0 -2 24 24" fill="currentColor"><path d="M10 0a10 10 0 0 0-3.16 19.49c.5.1.68-.22.68-.48l-.01-1.7c-2.78.6-3.37-1.34-3.37-1.34-.46-1.16-1.11-1.47-1.11-1.47-.9-.62.07-.6.07-.6 1 .07 1.53 1.03 1.53 1.03.9 1.52 2.34 1.08 2.91.83.1-.65.35-1.09.63-1.34-2.22-.25-4.55-1.11-4.55-4.94 0-1.1.39-1.99 1.03-2.69a3.6 3.6 0 0 1 .1-2.64s.84-.27 2.75 1.02a9.58 9.58 0 0 1 5 0c1.91-1.3 2.75-1.02 2.75-1.02.55 1.37.2 2.4.1 2.64.64.7 1.03 1.6 1.03 2.69 0 3.84-2.34 4.68-4.57 4.93.36.31.68.92.68 1.85l-.01 2.75c0 .26.18.58.69.48A10 10 0 0 0 10 0"></path></svg></a></div></div></div></footer></div></div></main><!--/$--><div class="hidden -mt-16 lg:max-w-custom-xs 2xl:block"><nav role="navigation" class="pt-20 sticky top-0 end-0"><h2 class="mb-3 lg:mb-3 uppercase tracking-wide font-bold text-sm text-secondary dark:text-secondary-dark px-4 w-full">On this page</h2><div class="h-full overflow-y-auto ps-4 max-h-[calc(100vh-7.5rem)]" style="overscroll-behavior:contain"><ul class="space-y-2 pb-16"><li class="text-sm px-2 rounded-s-xl bg-highlight dark:bg-highlight-dark"><a class="text-link dark:text-link-dark font-bold block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#">Overview</a></li><li class="text-sm px-2 rounded-s-xl"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#the-problem-with-passing-props">The problem with passing props </a></li><li class="text-sm px-2 rounded-s-xl"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#context-an-alternative-to-passing-props">Context: an alternative to passing props </a></li><li class="text-sm px-2 rounded-s-xl ps-4"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#step-1-create-the-context">Step 1: Create the context </a></li><li class="text-sm px-2 rounded-s-xl ps-4"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#step-2-use-the-context">Step 2: Use the context </a></li><li class="text-sm px-2 rounded-s-xl ps-4"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#step-3-provide-the-context">Step 3: Provide the context </a></li><li class="text-sm px-2 rounded-s-xl"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#using-and-providing-context-from-the-same-component">Using and providing context from the same component </a></li><li class="text-sm px-2 rounded-s-xl"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#context-passes-through-intermediate-components">Context passes through intermediate components </a></li><li class="text-sm px-2 rounded-s-xl"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#before-you-use-context">Before you use context </a></li><li class="text-sm px-2 rounded-s-xl"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#use-cases-for-context">Use cases for context </a></li><li class="text-sm px-2 rounded-s-xl"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#recap">Recap</a></li><li class="text-sm px-2 rounded-s-xl"><a class="text-secondary dark:text-secondary-dark block hover:text-link dark:hover:text-link-dark leading-normal py-2" href="#challenges">Challenges</a></li></ul></div></nav></div></div></div><script id="__NEXT_DATA__" type="application/json">{"props":{"pageProps":{"toc":"[{\"url\":\"#\",\"text\":\"Overview\",\"depth\":2},{\"url\":\"#the-problem-with-passing-props\",\"depth\":2,\"text\":\"The problem with passing props \"},{\"url\":\"#context-an-alternative-to-passing-props\",\"depth\":2,\"text\":\"Context: an alternative to passing props \"},{\"url\":\"#step-1-create-the-context\",\"depth\":3,\"text\":\"Step 1: Create the context \"},{\"url\":\"#step-2-use-the-context\",\"depth\":3,\"text\":\"Step 2: Use the context \"},{\"url\":\"#step-3-provide-the-context\",\"depth\":3,\"text\":\"Step 3: Provide the context \"},{\"url\":\"#using-and-providing-context-from-the-same-component\",\"depth\":2,\"text\":\"Using and providing context from the same component \"},{\"url\":\"#context-passes-through-intermediate-components\",\"depth\":2,\"text\":\"Context passes through intermediate components \"},{\"url\":\"#before-you-use-context\",\"depth\":2,\"text\":\"Before you use context \"},{\"url\":\"#use-cases-for-context\",\"depth\":2,\"text\":\"Use cases for context \"},{\"url\":\"#recap\",\"depth\":2,\"text\":\"Recap\"},{\"url\":\"#challenges\",\"depth\":2,\"text\":\"Challenges\"}]","content":"[[\"$r\",\"MaxWidth\",\"18\",{\"children\":[[\"$r\",\"Intro\",null,{\"children\":[\"$r\",\"p\",null,{\"children\":[\"Usually, you will pass information from a parent component to a child component via props. But passing props can become verbose and inconvenient if you have to pass them through many components in the middle, or if many components in your app need the same information. \",[\"$r\",\"em\",null,{\"children\":\"Context\"}],\" lets the parent component make some information available to any component in the tree below it—no matter how deep—without passing it explicitly through props.\"]}]}],\"\\n\",[\"$r\",\"YouWillLearn\",null,{\"children\":[\"$r\",\"ul\",null,{\"children\":[\"\\n\",[\"$r\",\"li\",null,{\"children\":\"What “prop drilling” is\"}],\"\\n\",[\"$r\",\"li\",null,{\"children\":\"How to replace repetitive prop passing with context\"}],\"\\n\",[\"$r\",\"li\",null,{\"children\":\"Common use cases for context\"}],\"\\n\",[\"$r\",\"li\",null,{\"children\":\"Common alternatives to context\"}],\"\\n\"]}]}],\"\\n\",[\"$r\",\"h2\",null,{\"id\":\"the-problem-with-passing-props\",\"children\":\"The problem with passing props \"}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[[\"$r\",\"a\",null,{\"href\":\"/learn/passing-props-to-a-component\",\"children\":\"Passing props\"}],\" is a great way to explicitly pipe data through your UI tree to the components that use it.\"]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"But passing props can become verbose and inconvenient when you need to pass some prop deeply through the tree, or if many components need the same prop. The nearest common ancestor could be far removed from the components that need data, and \",[\"$r\",\"a\",null,{\"href\":\"/learn/sharing-state-between-components\",\"children\":\"lifting state up\"}],\" that high can lead to a situation called “prop drilling”.\"]}],\"\\n\",[\"$r\",\"DiagramGroup\",null,{\"children\":[[\"$r\",\"Diagram\",null,{\"name\":\"passing_data_lifting_state\",\"height\":160,\"width\":608,\"captionPosition\":\"top\",\"alt\":\"Diagram with a tree of three components. The parent contains a bubble representing a value highlighted in purple. The value flows down to each of the two children, both highlighted in purple.\",\"children\":[\"$r\",\"p\",null,{\"children\":\"Lifting state up\"}]}],[\"$r\",\"Diagram\",null,{\"name\":\"passing_data_prop_drilling\",\"height\":430,\"width\":608,\"captionPosition\":\"top\",\"alt\":\"Diagram with a tree of ten nodes, each node with two children or less. The root node contains a bubble representing a value highlighted in purple. The value flows down through the two children, each of which pass the value but do not contain it. The left child passes the value down to two children which are both highlighted purple. The right child of the root passes the value through to one of its two children - the right one, which is highlighted purple. That child passed the value through its single child, which passes it down to both of its two children, which are highlighted purple.\",\"children\":[\"$r\",\"p\",null,{\"children\":\"Prop drilling\"}]}]]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":\"Wouldn’t it be great if there were a way to “teleport” data to the components in the tree that need it without passing props? With React’s context feature, there is!\"}],\"\\n\",[\"$r\",\"h2\",null,{\"id\":\"context-an-alternative-to-passing-props\",\"children\":\"Context: an alternative to passing props \"}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Context lets a parent component provide data to the entire tree below it. There are many uses for context. Here is one example. Consider this \",[\"$r\",\"code\",null,{\"children\":\"Heading\"}],\" component that accepts a \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" for its size:\"]}],\"\\n\"]}],[\"$r\",\"Sandpack\",null,{\"children\":[[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"import Heading from './Heading.js';\\nimport Section from './Section.js';\\n\\nexport default function Page() {\\n return (\\n \u003cSection\u003e\\n \u003cHeading level={1}\u003eTitle\u003c/Heading\u003e\\n \u003cHeading level={2}\u003eHeading\u003c/Heading\u003e\\n \u003cHeading level={3}\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading level={5}\u003eSub-sub-sub-heading\u003c/Heading\u003e\\n \u003cHeading level={6}\u003eSub-sub-sub-sub-heading\u003c/Heading\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Section.js\",\"children\":\"export default function Section({ children }) {\\n return (\\n \u003csection className=\\\"section\\\"\u003e\\n {children}\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Heading.js\",\"children\":\"export default function Heading({ level, children }) {\\n switch (level) {\\n case 1:\\n return \u003ch1\u003e{children}\u003c/h1\u003e;\\n case 2:\\n return \u003ch2\u003e{children}\u003c/h2\u003e;\\n case 3:\\n return \u003ch3\u003e{children}\u003c/h3\u003e;\\n case 4:\\n return \u003ch4\u003e{children}\u003c/h4\u003e;\\n case 5:\\n return \u003ch5\u003e{children}\u003c/h5\u003e;\\n case 6:\\n return \u003ch6\u003e{children}\u003c/h6\u003e;\\n default:\\n throw Error('Unknown level: ' + level);\\n }\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-css\",\"children\":\".section {\\n padding: 10px;\\n margin: 5px;\\n border-radius: 5px;\\n border: 1px solid #aaa;\\n}\\n\"}]}]]}],[\"$r\",\"MaxWidth\",\"22\",{\"children\":[\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Let’s say you want multiple headings within the same \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" to always have the same size:\"]}],\"\\n\"]}],[\"$r\",\"Sandpack\",null,{\"children\":[[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"import Heading from './Heading.js';\\nimport Section from './Section.js';\\n\\nexport default function Page() {\\n return (\\n \u003cSection\u003e\\n \u003cHeading level={1}\u003eTitle\u003c/Heading\u003e\\n \u003cSection\u003e\\n \u003cHeading level={2}\u003eHeading\u003c/Heading\u003e\\n \u003cHeading level={2}\u003eHeading\u003c/Heading\u003e\\n \u003cHeading level={2}\u003eHeading\u003c/Heading\u003e\\n \u003cSection\u003e\\n \u003cHeading level={3}\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading level={3}\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading level={3}\u003eSub-heading\u003c/Heading\u003e\\n \u003cSection\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Section.js\",\"children\":\"export default function Section({ children }) {\\n return (\\n \u003csection className=\\\"section\\\"\u003e\\n {children}\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Heading.js\",\"children\":\"export default function Heading({ level, children }) {\\n switch (level) {\\n case 1:\\n return \u003ch1\u003e{children}\u003c/h1\u003e;\\n case 2:\\n return \u003ch2\u003e{children}\u003c/h2\u003e;\\n case 3:\\n return \u003ch3\u003e{children}\u003c/h3\u003e;\\n case 4:\\n return \u003ch4\u003e{children}\u003c/h4\u003e;\\n case 5:\\n return \u003ch5\u003e{children}\u003c/h5\u003e;\\n case 6:\\n return \u003ch6\u003e{children}\u003c/h6\u003e;\\n default:\\n throw Error('Unknown level: ' + level);\\n }\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-css\",\"children\":\".section {\\n padding: 10px;\\n margin: 5px;\\n border-radius: 5px;\\n border: 1px solid #aaa;\\n}\\n\"}]}]]}],[\"$r\",\"MaxWidth\",\"46\",{\"children\":[\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Currently, you pass the \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" prop to each \",[\"$r\",\"code\",null,{\"children\":\"\u003cHeading\u003e\"}],\" separately:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"\u003cSection\u003e\\n \u003cHeading level={3}\u003eAbout\u003c/Heading\u003e\\n \u003cHeading level={3}\u003ePhotos\u003c/Heading\u003e\\n \u003cHeading level={3}\u003eVideos\u003c/Heading\u003e\\n\u003c/Section\u003e\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"It would be nice if you could pass the \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" prop to the \",[\"$r\",\"code\",null,{\"children\":\"\u003cSection\u003e\"}],\" component instead and remove it from the \",[\"$r\",\"code\",null,{\"children\":\"\u003cHeading\u003e\"}],\". This way you could enforce that all headings in the same section have the same size:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"\u003cSection level={3}\u003e\\n \u003cHeading\u003eAbout\u003c/Heading\u003e\\n \u003cHeading\u003ePhotos\u003c/Heading\u003e\\n \u003cHeading\u003eVideos\u003c/Heading\u003e\\n\u003c/Section\u003e\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"But how can the \",[\"$r\",\"code\",null,{\"children\":\"\u003cHeading\u003e\"}],\" component know the level of its closest \",[\"$r\",\"code\",null,{\"children\":\"\u003cSection\u003e\"}],\"? \",[\"$r\",\"strong\",null,{\"children\":\"That would require some way for a child to “ask” for data from somewhere above in the tree.\"}]]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":\"You can’t do it with props alone. This is where context comes into play. You will do it in three steps:\"}],\"\\n\",[\"$r\",\"ol\",null,{\"children\":[\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":\"Create\"}],\" a context. (You can call it \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\", since it’s for the heading level.)\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":\"Use\"}],\" that context from the component that needs the data. (\",[\"$r\",\"code\",null,{\"children\":\"Heading\"}],\" will use \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\".)\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":\"Provide\"}],\" that context from the component that specifies the data. (\",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" will provide \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\".)\"]}],\"\\n\"]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":\"Context lets a parent—even a distant one!—provide some data to the entire tree inside of it.\"}],\"\\n\",[\"$r\",\"DiagramGroup\",null,{\"children\":[[\"$r\",\"Diagram\",null,{\"name\":\"passing_data_context_close\",\"height\":160,\"width\":608,\"captionPosition\":\"top\",\"alt\":\"Diagram with a tree of three components. The parent contains a bubble representing a value highlighted in orange which projects down to the two children, each highlighted in orange.\",\"children\":[\"$r\",\"p\",null,{\"children\":\"Using context in close children\"}]}],[\"$r\",\"Diagram\",null,{\"name\":\"passing_data_context_far\",\"height\":430,\"width\":608,\"captionPosition\":\"top\",\"alt\":\"Diagram with a tree of ten nodes, each node with two children or less. The root parent node contains a bubble representing a value highlighted in orange. The value projects down directly to four leaves and one intermediate component in the tree, which are all highlighted in orange. None of the other intermediate components are highlighted.\",\"children\":[\"$r\",\"p\",null,{\"children\":\"Using context in distant children\"}]}]]}],\"\\n\",[\"$r\",\"h3\",null,{\"id\":\"step-1-create-the-context\",\"children\":\"Step 1: Create the context \"}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"First, you need to create the context. You’ll need to \",[\"$r\",\"strong\",null,{\"children\":\"export it from a file\"}],\" so that your components can use it:\"]}],\"\\n\"]}],[\"$r\",\"Sandpack\",null,{\"children\":[[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"import Heading from './Heading.js';\\nimport Section from './Section.js';\\n\\nexport default function Page() {\\n return (\\n \u003cSection\u003e\\n \u003cHeading level={1}\u003eTitle\u003c/Heading\u003e\\n \u003cSection\u003e\\n \u003cHeading level={2}\u003eHeading\u003c/Heading\u003e\\n \u003cHeading level={2}\u003eHeading\u003c/Heading\u003e\\n \u003cHeading level={2}\u003eHeading\u003c/Heading\u003e\\n \u003cSection\u003e\\n \u003cHeading level={3}\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading level={3}\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading level={3}\u003eSub-heading\u003c/Heading\u003e\\n \u003cSection\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Section.js\",\"children\":\"export default function Section({ children }) {\\n return (\\n \u003csection className=\\\"section\\\"\u003e\\n {children}\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Heading.js\",\"children\":\"export default function Heading({ level, children }) {\\n switch (level) {\\n case 1:\\n return \u003ch1\u003e{children}\u003c/h1\u003e;\\n case 2:\\n return \u003ch2\u003e{children}\u003c/h2\u003e;\\n case 3:\\n return \u003ch3\u003e{children}\u003c/h3\u003e;\\n case 4:\\n return \u003ch4\u003e{children}\u003c/h4\u003e;\\n case 5:\\n return \u003ch5\u003e{children}\u003c/h5\u003e;\\n case 6:\\n return \u003ch6\u003e{children}\u003c/h6\u003e;\\n default:\\n throw Error('Unknown level: ' + level);\\n }\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/LevelContext.js active\",\"children\":\"import { createContext } from 'react';\\n\\nexport const LevelContext = createContext(1);\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-css\",\"children\":\".section {\\n padding: 10px;\\n margin: 5px;\\n border-radius: 5px;\\n border: 1px solid #aaa;\\n}\\n\"}]}]]}],[\"$r\",\"MaxWidth\",\"76\",{\"children\":[\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"The only argument to \",[\"$r\",\"code\",null,{\"children\":\"createContext\"}],\" is the \",[\"$r\",\"em\",null,{\"children\":\"default\"}],\" value. Here, \",[\"$r\",\"code\",null,{\"children\":\"1\"}],\" refers to the biggest heading level, but you could pass any kind of value (even an object). You will see the significance of the default value in the next step.\"]}],\"\\n\",[\"$r\",\"h3\",null,{\"id\":\"step-2-use-the-context\",\"children\":\"Step 2: Use the context \"}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Import the \",[\"$r\",\"code\",null,{\"children\":\"useContext\"}],\" Hook from React and your context:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"import { useContext } from 'react';\\nimport { LevelContext } from './LevelContext.js';\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Currently, the \",[\"$r\",\"code\",null,{\"children\":\"Heading\"}],\" component reads \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" from props:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"export default function Heading({ level, children }) {\\n // ...\\n}\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Instead, remove the \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" prop and read the value from the context you just imported, \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\":\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"{2}\",\"children\":\"export default function Heading({ children }) {\\n const level = useContext(LevelContext);\\n // ...\\n}\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[[\"$r\",\"code\",null,{\"children\":\"useContext\"}],\" is a Hook. Just like \",[\"$r\",\"code\",null,{\"children\":\"useState\"}],\" and \",[\"$r\",\"code\",null,{\"children\":\"useReducer\"}],\", you can only call a Hook immediately inside a React component (not inside loops or conditions). \",[\"$r\",\"strong\",null,{\"children\":[[\"$r\",\"code\",null,{\"children\":\"useContext\"}],\" tells React that the \",[\"$r\",\"code\",null,{\"children\":\"Heading\"}],\" component wants to read the \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\".\"]}]]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Now that the \",[\"$r\",\"code\",null,{\"children\":\"Heading\"}],\" component doesn’t have a \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" prop, you don’t need to pass the level prop to \",[\"$r\",\"code\",null,{\"children\":\"Heading\"}],\" in your JSX like this anymore:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"\u003cSection\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading level={4}\u003eSub-sub-heading\u003c/Heading\u003e\\n\u003c/Section\u003e\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Update the JSX so that it’s the \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" that receives it instead:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-jsx\",\"children\":\"\u003cSection level={4}\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n\u003c/Section\u003e\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":\"As a reminder, this is the markup that you were trying to get working:\"}],\"\\n\"]}],[\"$r\",\"Sandpack\",null,{\"children\":[[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"import Heading from './Heading.js';\\nimport Section from './Section.js';\\n\\nexport default function Page() {\\n return (\\n \u003cSection level={1}\u003e\\n \u003cHeading\u003eTitle\u003c/Heading\u003e\\n \u003cSection level={2}\u003e\\n \u003cHeading\u003eHeading\u003c/Heading\u003e\\n \u003cHeading\u003eHeading\u003c/Heading\u003e\\n \u003cHeading\u003eHeading\u003c/Heading\u003e\\n \u003cSection level={3}\u003e\\n \u003cHeading\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-heading\u003c/Heading\u003e\\n \u003cSection level={4}\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Section.js\",\"children\":\"export default function Section({ children }) {\\n return (\\n \u003csection className=\\\"section\\\"\u003e\\n {children}\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Heading.js\",\"children\":\"import { useContext } from 'react';\\nimport { LevelContext } from './LevelContext.js';\\n\\nexport default function Heading({ children }) {\\n const level = useContext(LevelContext);\\n switch (level) {\\n case 1:\\n return \u003ch1\u003e{children}\u003c/h1\u003e;\\n case 2:\\n return \u003ch2\u003e{children}\u003c/h2\u003e;\\n case 3:\\n return \u003ch3\u003e{children}\u003c/h3\u003e;\\n case 4:\\n return \u003ch4\u003e{children}\u003c/h4\u003e;\\n case 5:\\n return \u003ch5\u003e{children}\u003c/h5\u003e;\\n case 6:\\n return \u003ch6\u003e{children}\u003c/h6\u003e;\\n default:\\n throw Error('Unknown level: ' + level);\\n }\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/LevelContext.js\",\"children\":\"import { createContext } from 'react';\\n\\nexport const LevelContext = createContext(1);\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-css\",\"children\":\".section {\\n padding: 10px;\\n margin: 5px;\\n border-radius: 5px;\\n border: 1px solid #aaa;\\n}\\n\"}]}]]}],[\"$r\",\"MaxWidth\",\"94\",{\"children\":[\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Notice this example doesn’t quite work, yet! All the headings have the same size because \",[\"$r\",\"strong\",null,{\"children\":[\"even though you’re \",[\"$r\",\"em\",null,{\"children\":\"using\"}],\" the context, you have not \",[\"$r\",\"em\",null,{\"children\":\"provided\"}],\" it yet.\"]}],\" React doesn’t know where to get it!\"]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"If you don’t provide the context, React will use the default value you’ve specified in the previous step. In this example, you specified \",[\"$r\",\"code\",null,{\"children\":\"1\"}],\" as the argument to \",[\"$r\",\"code\",null,{\"children\":\"createContext\"}],\", so \",[\"$r\",\"code\",null,{\"children\":\"useContext(LevelContext)\"}],\" returns \",[\"$r\",\"code\",null,{\"children\":\"1\"}],\", setting all those headings to \",[\"$r\",\"code\",null,{\"children\":\"\u003ch1\u003e\"}],\". Let’s fix this problem by having each \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" provide its own context.\"]}],\"\\n\",[\"$r\",\"h3\",null,{\"id\":\"step-3-provide-the-context\",\"children\":\"Step 3: Provide the context \"}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"The \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" component currently renders its children:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"export default function Section({ children }) {\\n return (\\n \u003csection className=\\\"section\\\"\u003e\\n {children}\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":\"Wrap them with a context provider\"}],\" to provide the \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\" to them:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"{1,6,8}\",\"children\":\"import { LevelContext } from './LevelContext.js';\\n\\nexport default function Section({ level, children }) {\\n return (\\n \u003csection className=\\\"section\\\"\u003e\\n \u003cLevelContext value={level}\u003e\\n {children}\\n \u003c/LevelContext\u003e\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"This tells React: “if any component inside this \",[\"$r\",\"code\",null,{\"children\":\"\u003cSection\u003e\"}],\" asks for \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\", give them this \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\".” The component will use the value of the nearest \",[\"$r\",\"code\",null,{\"children\":\"\u003cLevelContext\u003e\"}],\" in the UI tree above it.\"]}],\"\\n\"]}],[\"$r\",\"Sandpack\",null,{\"children\":[[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"import Heading from './Heading.js';\\nimport Section from './Section.js';\\n\\nexport default function Page() {\\n return (\\n \u003cSection level={1}\u003e\\n \u003cHeading\u003eTitle\u003c/Heading\u003e\\n \u003cSection level={2}\u003e\\n \u003cHeading\u003eHeading\u003c/Heading\u003e\\n \u003cHeading\u003eHeading\u003c/Heading\u003e\\n \u003cHeading\u003eHeading\u003c/Heading\u003e\\n \u003cSection level={3}\u003e\\n \u003cHeading\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-heading\u003c/Heading\u003e\\n \u003cSection level={4}\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Section.js\",\"children\":\"import { LevelContext } from './LevelContext.js';\\n\\nexport default function Section({ level, children }) {\\n return (\\n \u003csection className=\\\"section\\\"\u003e\\n \u003cLevelContext value={level}\u003e\\n {children}\\n \u003c/LevelContext\u003e\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Heading.js\",\"children\":\"import { useContext } from 'react';\\nimport { LevelContext } from './LevelContext.js';\\n\\nexport default function Heading({ children }) {\\n const level = useContext(LevelContext);\\n switch (level) {\\n case 1:\\n return \u003ch1\u003e{children}\u003c/h1\u003e;\\n case 2:\\n return \u003ch2\u003e{children}\u003c/h2\u003e;\\n case 3:\\n return \u003ch3\u003e{children}\u003c/h3\u003e;\\n case 4:\\n return \u003ch4\u003e{children}\u003c/h4\u003e;\\n case 5:\\n return \u003ch5\u003e{children}\u003c/h5\u003e;\\n case 6:\\n return \u003ch6\u003e{children}\u003c/h6\u003e;\\n default:\\n throw Error('Unknown level: ' + level);\\n }\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/LevelContext.js\",\"children\":\"import { createContext } from 'react';\\n\\nexport const LevelContext = createContext(1);\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-css\",\"children\":\".section {\\n padding: 10px;\\n margin: 5px;\\n border-radius: 5px;\\n border: 1px solid #aaa;\\n}\\n\"}]}]]}],[\"$r\",\"MaxWidth\",\"112\",{\"children\":[\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"It’s the same result as the original code, but you did not need to pass the \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" prop to each \",[\"$r\",\"code\",null,{\"children\":\"Heading\"}],\" component! Instead, it “figures out” its heading level by asking the closest \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" above:\"]}],\"\\n\",[\"$r\",\"ol\",null,{\"children\":[\"\\n\",[\"$r\",\"li\",null,{\"children\":[\"You pass a \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" prop to the \",[\"$r\",\"code\",null,{\"children\":\"\u003cSection\u003e\"}],\".\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" wraps its children into \",[\"$r\",\"code\",null,{\"children\":\"\u003cLevelContext value={level}\u003e\"}],\".\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"code\",null,{\"children\":\"Heading\"}],\" asks the closest value of \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\" above with \",[\"$r\",\"code\",null,{\"children\":\"useContext(LevelContext)\"}],\".\"]}],\"\\n\"]}],\"\\n\",[\"$r\",\"h2\",null,{\"id\":\"using-and-providing-context-from-the-same-component\",\"children\":\"Using and providing context from the same component \"}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Currently, you still have to specify each section’s \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" manually:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"export default function Page() {\\n return (\\n \u003cSection level={1}\u003e\\n ...\\n \u003cSection level={2}\u003e\\n ...\\n \u003cSection level={3}\u003e\\n ...\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Since context lets you read information from a component above, each \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" could read the \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" from the \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" above, and pass \",[\"$r\",\"code\",null,{\"children\":\"level + 1\"}],\" down automatically. Here is how you could do it:\"]}],\"\\n\",[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Section.js {5,8}\",\"children\":\"import { useContext } from 'react';\\nimport { LevelContext } from './LevelContext.js';\\n\\nexport default function Section({ children }) {\\n const level = useContext(LevelContext);\\n return (\\n \u003csection className=\\\"section\\\"\u003e\\n \u003cLevelContext value={level + 1}\u003e\\n {children}\\n \u003c/LevelContext\u003e\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"With this change, you don’t need to pass the \",[\"$r\",\"code\",null,{\"children\":\"level\"}],\" prop \",[\"$r\",\"em\",null,{\"children\":\"either\"}],\" to the \",[\"$r\",\"code\",null,{\"children\":\"\u003cSection\u003e\"}],\" or to the \",[\"$r\",\"code\",null,{\"children\":\"\u003cHeading\u003e\"}],\":\"]}],\"\\n\"]}],[\"$r\",\"Sandpack\",null,{\"children\":[[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"import Heading from './Heading.js';\\nimport Section from './Section.js';\\n\\nexport default function Page() {\\n return (\\n \u003cSection\u003e\\n \u003cHeading\u003eTitle\u003c/Heading\u003e\\n \u003cSection\u003e\\n \u003cHeading\u003eHeading\u003c/Heading\u003e\\n \u003cHeading\u003eHeading\u003c/Heading\u003e\\n \u003cHeading\u003eHeading\u003c/Heading\u003e\\n \u003cSection\u003e\\n \u003cHeading\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-heading\u003c/Heading\u003e\\n \u003cSection\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003cHeading\u003eSub-sub-heading\u003c/Heading\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Section.js\",\"children\":\"import { useContext } from 'react';\\nimport { LevelContext } from './LevelContext.js';\\n\\nexport default function Section({ children }) {\\n const level = useContext(LevelContext);\\n return (\\n \u003csection className=\\\"section\\\"\u003e\\n \u003cLevelContext value={level + 1}\u003e\\n {children}\\n \u003c/LevelContext\u003e\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Heading.js\",\"children\":\"import { useContext } from 'react';\\nimport { LevelContext } from './LevelContext.js';\\n\\nexport default function Heading({ children }) {\\n const level = useContext(LevelContext);\\n switch (level) {\\n case 0:\\n throw Error('Heading must be inside a Section!');\\n case 1:\\n return \u003ch1\u003e{children}\u003c/h1\u003e;\\n case 2:\\n return \u003ch2\u003e{children}\u003c/h2\u003e;\\n case 3:\\n return \u003ch3\u003e{children}\u003c/h3\u003e;\\n case 4:\\n return \u003ch4\u003e{children}\u003c/h4\u003e;\\n case 5:\\n return \u003ch5\u003e{children}\u003c/h5\u003e;\\n case 6:\\n return \u003ch6\u003e{children}\u003c/h6\u003e;\\n default:\\n throw Error('Unknown level: ' + level);\\n }\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/LevelContext.js\",\"children\":\"import { createContext } from 'react';\\n\\nexport const LevelContext = createContext(0);\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-css\",\"children\":\".section {\\n padding: 10px;\\n margin: 5px;\\n border-radius: 5px;\\n border: 1px solid #aaa;\\n}\\n\"}]}]]}],[\"$r\",\"MaxWidth\",\"124\",{\"children\":[\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Now both \",[\"$r\",\"code\",null,{\"children\":\"Heading\"}],\" and \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" read the \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\" to figure out how “deep” they are. And the \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" wraps its children into the \",[\"$r\",\"code\",null,{\"children\":\"LevelContext\"}],\" to specify that anything inside of it is at a “deeper” level.\"]}],\"\\n\",[\"$r\",\"Note\",null,{\"children\":[\"$r\",\"p\",null,{\"children\":\"This example uses heading levels because they show visually how nested components can override context. But context is useful for many other use cases too. You can pass down any information needed by the entire subtree: the current color theme, the currently logged in user, and so on.\"}]}],\"\\n\",[\"$r\",\"h2\",null,{\"id\":\"context-passes-through-intermediate-components\",\"children\":\"Context passes through intermediate components \"}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"You can insert as many components as you like between the component that provides context and the one that uses it. This includes both built-in components like \",[\"$r\",\"code\",null,{\"children\":\"\u003cdiv\u003e\"}],\" and components you might build yourself.\"]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"In this example, the same \",[\"$r\",\"code\",null,{\"children\":\"Post\"}],\" component (with a dashed border) is rendered at two different nesting levels. Notice that the \",[\"$r\",\"code\",null,{\"children\":\"\u003cHeading\u003e\"}],\" inside of it gets its level automatically from the closest \",[\"$r\",\"code\",null,{\"children\":\"\u003cSection\u003e\"}],\":\"]}],\"\\n\"]}],[\"$r\",\"Sandpack\",null,{\"children\":[[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"children\":\"import Heading from './Heading.js';\\nimport Section from './Section.js';\\n\\nexport default function ProfilePage() {\\n return (\\n \u003cSection\u003e\\n \u003cHeading\u003eMy Profile\u003c/Heading\u003e\\n \u003cPost\\n title=\\\"Hello traveller!\\\"\\n body=\\\"Read about my adventures.\\\"\\n /\u003e\\n \u003cAllPosts /\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\\nfunction AllPosts() {\\n return (\\n \u003cSection\u003e\\n \u003cHeading\u003ePosts\u003c/Heading\u003e\\n \u003cRecentPosts /\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\\nfunction RecentPosts() {\\n return (\\n \u003cSection\u003e\\n \u003cHeading\u003eRecent Posts\u003c/Heading\u003e\\n \u003cPost\\n title=\\\"Flavors of Lisbon\\\"\\n body=\\\"...those pastéis de nata!\\\"\\n /\u003e\\n \u003cPost\\n title=\\\"Buenos Aires in the rhythm of tango\\\"\\n body=\\\"I loved it!\\\"\\n /\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\\nfunction Post({ title, body }) {\\n return (\\n \u003cSection isFancy={true}\u003e\\n \u003cHeading\u003e\\n {title}\\n \u003c/Heading\u003e\\n \u003cp\u003e\u003ci\u003e{body}\u003c/i\u003e\u003c/p\u003e\\n \u003c/Section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Section.js\",\"children\":\"import { useContext } from 'react';\\nimport { LevelContext } from './LevelContext.js';\\n\\nexport default function Section({ children, isFancy }) {\\n const level = useContext(LevelContext);\\n return (\\n \u003csection className={\\n 'section ' +\\n (isFancy ? 'fancy' : '')\\n }\u003e\\n \u003cLevelContext value={level + 1}\u003e\\n {children}\\n \u003c/LevelContext\u003e\\n \u003c/section\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Heading.js\",\"children\":\"import { useContext } from 'react';\\nimport { LevelContext } from './LevelContext.js';\\n\\nexport default function Heading({ children }) {\\n const level = useContext(LevelContext);\\n switch (level) {\\n case 0:\\n throw Error('Heading must be inside a Section!');\\n case 1:\\n return \u003ch1\u003e{children}\u003c/h1\u003e;\\n case 2:\\n return \u003ch2\u003e{children}\u003c/h2\u003e;\\n case 3:\\n return \u003ch3\u003e{children}\u003c/h3\u003e;\\n case 4:\\n return \u003ch4\u003e{children}\u003c/h4\u003e;\\n case 5:\\n return \u003ch5\u003e{children}\u003c/h5\u003e;\\n case 6:\\n return \u003ch6\u003e{children}\u003c/h6\u003e;\\n default:\\n throw Error('Unknown level: ' + level);\\n }\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/LevelContext.js\",\"children\":\"import { createContext } from 'react';\\n\\nexport const LevelContext = createContext(0);\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-css\",\"children\":\".section {\\n padding: 10px;\\n margin: 5px;\\n border-radius: 5px;\\n border: 1px solid #aaa;\\n}\\n\\n.fancy {\\n border: 4px dashed pink;\\n}\\n\"}]}]]}],[\"$r\",\"MaxWidth\",\"154\",{\"children\":[\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"You didn’t do anything special for this to work. A \",[\"$r\",\"code\",null,{\"children\":\"Section\"}],\" specifies the context for the tree inside it, so you can insert a \",[\"$r\",\"code\",null,{\"children\":\"\u003cHeading\u003e\"}],\" anywhere, and it will have the correct size. Try it in the sandbox above!\"]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"$r\",\"strong\",null,{\"children\":[\"Context lets you write components that “adapt to their surroundings” and display themselves differently depending on \",[\"$r\",\"em\",null,{\"children\":\"where\"}],\" (or, in other words, \",[\"$r\",\"em\",null,{\"children\":\"in which context\"}],\") they are being rendered.\"]}]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"How context works might remind you of \",[\"$r\",\"a\",null,{\"href\":\"https://developer.mozilla.org/en-US/docs/Web/CSS/inheritance\",\"target\":\"_blank\",\"rel\":\"nofollow noopener noreferrer\",\"children\":\"CSS property inheritance.\"}],\" In CSS, you can specify \",[\"$r\",\"code\",null,{\"children\":\"color: blue\"}],\" for a \",[\"$r\",\"code\",null,{\"children\":\"\u003cdiv\u003e\"}],\", and any DOM node inside of it, no matter how deep, will inherit that color unless some other DOM node in the middle overrides it with \",[\"$r\",\"code\",null,{\"children\":\"color: green\"}],\". Similarly, in React, the only way to override some context coming from above is to wrap children into a context provider with a different value.\"]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"In CSS, different properties like \",[\"$r\",\"code\",null,{\"children\":\"color\"}],\" and \",[\"$r\",\"code\",null,{\"children\":\"background-color\"}],\" don’t override each other. You can set all \",[\"$r\",\"code\",null,{\"children\":\"\u003cdiv\u003e\"}],\"’s \",[\"$r\",\"code\",null,{\"children\":\"color\"}],\" to red without impacting \",[\"$r\",\"code\",null,{\"children\":\"background-color\"}],\". Similarly, \",[\"$r\",\"strong\",null,{\"children\":\"different React contexts don’t override each other.\"}],\" Each context that you make with \",[\"$r\",\"code\",null,{\"children\":\"createContext()\"}],\" is completely separate from other ones, and ties together components using and providing \",[\"$r\",\"em\",null,{\"children\":\"that particular\"}],\" context. One component may use or provide many different contexts without a problem.\"]}],\"\\n\",[\"$r\",\"h2\",null,{\"id\":\"before-you-use-context\",\"children\":\"Before you use context \"}],\"\\n\",[\"$r\",\"p\",null,{\"children\":[\"Context is very tempting to use! However, this also means it’s too easy to overuse it. \",[\"$r\",\"strong\",null,{\"children\":\"Just because you need to pass some props several levels deep doesn’t mean you should put that information into context.\"}]]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":\"Here’s a few alternatives you should consider before using context:\"}],\"\\n\",[\"$r\",\"ol\",null,{\"children\":[\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":[\"Start by \",[\"$r\",\"a\",null,{\"href\":\"/learn/passing-props-to-a-component\",\"children\":\"passing props.\"}]]}],\" If your components are not trivial, it’s not unusual to pass a dozen props down through a dozen components. It may feel like a slog, but it makes it very clear which components use which data! The person maintaining your code will be glad you’ve made the data flow explicit with props.\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":[\"Extract components and \",[\"$r\",\"a\",null,{\"href\":\"/learn/passing-props-to-a-component#passing-jsx-as-children\",\"children\":[\"pass JSX as \",[\"$r\",\"code\",null,{\"children\":\"children\"}]]}],\" to them.\"]}],\" If you pass some data through many layers of intermediate components that don’t use that data (and only pass it further down), this often means that you forgot to extract some components along the way. For example, maybe you pass data props like \",[\"$r\",\"code\",null,{\"children\":\"posts\"}],\" to visual components that don’t use them directly, like \",[\"$r\",\"code\",null,{\"children\":\"\u003cLayout posts={posts} /\u003e\"}],\". Instead, make \",[\"$r\",\"code\",null,{\"children\":\"Layout\"}],\" take \",[\"$r\",\"code\",null,{\"children\":\"children\"}],\" as a prop, and render \",[\"$r\",\"code\",null,{\"children\":\"\u003cLayout\u003e\u003cPosts posts={posts} /\u003e\u003c/Layout\u003e\"}],\". This reduces the number of layers between the component specifying the data and the one that needs it.\"]}],\"\\n\"]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":\"If neither of these approaches works well for you, consider context.\"}],\"\\n\",[\"$r\",\"h2\",null,{\"id\":\"use-cases-for-context\",\"children\":\"Use cases for context \"}],\"\\n\",[\"$r\",\"ul\",null,{\"children\":[\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":\"Theming:\"}],\" If your app lets the user change its appearance (e.g. dark mode), you can put a context provider at the top of your app, and use that context in components that need to adjust their visual look.\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":\"Current account:\"}],\" Many components might need to know the currently logged in user. Putting it in context makes it convenient to read it anywhere in the tree. Some apps also let you operate multiple accounts at the same time (e.g. to leave a comment as a different user). In those cases, it can be convenient to wrap a part of the UI into a nested provider with a different current account value.\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":\"Routing:\"}],\" Most routing solutions use context internally to hold the current route. This is how every link “knows” whether it’s active or not. If you build your own router, you might want to do it too.\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[[\"$r\",\"strong\",null,{\"children\":\"Managing state:\"}],\" As your app grows, you might end up with a lot of state closer to the top of your app. Many distant components below may want to change it. It is common to \",[\"$r\",\"a\",null,{\"href\":\"/learn/scaling-up-with-reducer-and-context\",\"children\":\"use a reducer together with context\"}],\" to manage complex state and pass it down to distant components without too much hassle.\"]}],\"\\n\"]}],\"\\n\",[\"$r\",\"p\",null,{\"children\":\"Context is not limited to static values. If you pass a different value on the next render, React will update all the components reading it below! This is why context is often used in combination with state.\"}],\"\\n\",[\"$r\",\"p\",null,{\"children\":\"In general, if some information is needed by distant components in different parts of the tree, it’s a good indication that context will help you.\"}],\"\\n\",[\"$r\",\"Recap\",null,{\"children\":[\"$r\",\"ul\",null,{\"children\":[\"\\n\",[\"$r\",\"li\",null,{\"children\":\"Context lets a component provide some information to the entire tree below it.\"}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[\"To pass context:\",\"\\n\",[\"$r\",\"ol\",null,{\"children\":[\"\\n\",[\"$r\",\"li\",null,{\"children\":[\"Create and export it with \",[\"$r\",\"code\",null,{\"children\":\"export const MyContext = createContext(defaultValue)\"}],\".\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[\"Pass it to the \",[\"$r\",\"code\",null,{\"children\":\"useContext(MyContext)\"}],\" Hook to read it in any child component, no matter how deep.\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[\"Wrap children into \",[\"$r\",\"code\",null,{\"children\":\"\u003cMyContext value={...}\u003e\"}],\" to provide it from a parent.\"]}],\"\\n\"]}],\"\\n\"]}],\"\\n\",[\"$r\",\"li\",null,{\"children\":\"Context passes through any components in the middle.\"}],\"\\n\",[\"$r\",\"li\",null,{\"children\":\"Context lets you write components that “adapt to their surroundings”.\"}],\"\\n\",[\"$r\",\"li\",null,{\"children\":[\"Before you use context, try passing props or passing JSX as \",[\"$r\",\"code\",null,{\"children\":\"children\"}],\".\"]}],\"\\n\"]}]}],\"\\n\"]}],[\"$r\",\"Challenges\",null,{\"children\":[[\"$r\",\"h4\",null,{\"id\":\"replace-prop-drilling-with-context\",\"children\":\"Replace prop drilling with context \"}],[\"$r\",\"p\",null,{\"children\":[\"In this example, toggling the checkbox changes the \",[\"$r\",\"code\",null,{\"children\":\"imageSize\"}],\" prop passed to each \",[\"$r\",\"code\",null,{\"children\":\"\u003cPlaceImage\u003e\"}],\". The checkbox state is held in the top-level \",[\"$r\",\"code\",null,{\"children\":\"App\"}],\" component, but each \",[\"$r\",\"code\",null,{\"children\":\"\u003cPlaceImage\u003e\"}],\" needs to be aware of it.\"]}],[\"$r\",\"p\",null,{\"children\":[\"Currently, \",[\"$r\",\"code\",null,{\"children\":\"App\"}],\" passes \",[\"$r\",\"code\",null,{\"children\":\"imageSize\"}],\" to \",[\"$r\",\"code\",null,{\"children\":\"List\"}],\", which passes it to each \",[\"$r\",\"code\",null,{\"children\":\"Place\"}],\", which passes it to the \",[\"$r\",\"code\",null,{\"children\":\"PlaceImage\"}],\". Remove the \",[\"$r\",\"code\",null,{\"children\":\"imageSize\"}],\" prop, and instead pass it from the \",[\"$r\",\"code\",null,{\"children\":\"App\"}],\" component directly to \",[\"$r\",\"code\",null,{\"children\":\"PlaceImage\"}],\".\"]}],[\"$r\",\"p\",null,{\"children\":[\"You can declare context in \",[\"$r\",\"code\",null,{\"children\":\"Context.js\"}],\".\"]}],[\"$r\",\"Sandpack\",null,{\"children\":[[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/App.js\",\"children\":\"import { useState } from 'react';\\nimport { places } from './data.js';\\nimport { getImageUrl } from './utils.js';\\n\\nexport default function App() {\\n const [isLarge, setIsLarge] = useState(false);\\n const imageSize = isLarge ? 150 : 100;\\n return (\\n \u003c\u003e\\n \u003clabel\u003e\\n \u003cinput\\n type=\\\"checkbox\\\"\\n checked={isLarge}\\n onChange={e =\u003e {\\n setIsLarge(e.target.checked);\\n }}\\n /\u003e\\n Use large images\\n \u003c/label\u003e\\n \u003chr /\u003e\\n \u003cList imageSize={imageSize} /\u003e\\n \u003c/\u003e\\n )\\n}\\n\\nfunction List({ imageSize }) {\\n const listItems = places.map(place =\u003e\\n \u003cli key={place.id}\u003e\\n \u003cPlace\\n place={place}\\n imageSize={imageSize}\\n /\u003e\\n \u003c/li\u003e\\n );\\n return \u003cul\u003e{listItems}\u003c/ul\u003e;\\n}\\n\\nfunction Place({ place, imageSize }) {\\n return (\\n \u003c\u003e\\n \u003cPlaceImage\\n place={place}\\n imageSize={imageSize}\\n /\u003e\\n \u003cp\u003e\\n \u003cb\u003e{place.name}\u003c/b\u003e\\n {': ' + place.description}\\n \u003c/p\u003e\\n \u003c/\u003e\\n );\\n}\\n\\nfunction PlaceImage({ place, imageSize }) {\\n return (\\n \u003cimg\\n src={getImageUrl(place)}\\n alt={place.name}\\n width={imageSize}\\n height={imageSize}\\n /\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Context.js\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/data.js\",\"children\":\"export const places = [{\\n id: 0,\\n name: 'Bo-Kaap in Cape Town, South Africa',\\n description: 'The tradition of choosing bright colors for houses began in the late 20th century.',\\n imageId: 'K9HVAGH'\\n}, {\\n id: 1, \\n name: 'Rainbow Village in Taichung, Taiwan',\\n description: 'To save the houses from demolition, Huang Yung-Fu, a local resident, painted all 1,200 of them in 1924.',\\n imageId: '9EAYZrt'\\n}, {\\n id: 2, \\n name: 'Macromural de Pachuca, Mexico',\\n description: 'One of the largest murals in the world covering homes in a hillside neighborhood.',\\n imageId: 'DgXHVwu'\\n}, {\\n id: 3, \\n name: 'Selarón Staircase in Rio de Janeiro, Brazil',\\n description: 'This landmark was created by Jorge Selarón, a Chilean-born artist, as a \\\"tribute to the Brazilian people.\\\"',\\n imageId: 'aeO3rpI'\\n}, {\\n id: 4, \\n name: 'Burano, Italy',\\n description: 'The houses are painted following a specific color system dating back to 16th century.',\\n imageId: 'kxsph5C'\\n}, {\\n id: 5, \\n name: 'Chefchaouen, Marocco',\\n description: 'There are a few theories on why the houses are painted blue, including that the color repels mosquitos or that it symbolizes sky and heaven.',\\n imageId: 'rTqKo46'\\n}, {\\n id: 6,\\n name: 'Gamcheon Culture Village in Busan, South Korea',\\n description: 'In 2009, the village was converted into a cultural hub by painting the houses and featuring exhibitions and art installations.',\\n imageId: 'ZfQOOzf'\\n}];\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/utils.js\",\"children\":\"export function getImageUrl(place) {\\n return (\\n 'https://i.imgur.com/' +\\n place.imageId +\\n 'l.jpg'\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-css\",\"children\":\"ul { list-style-type: none; padding: 0px 10px; }\\nli { \\n margin-bottom: 10px; \\n display: grid; \\n grid-template-columns: auto 1fr;\\n gap: 20px;\\n align-items: center;\\n}\\n\"}]}]]}],[\"$r\",\"Solution\",null,{\"children\":[[\"$r\",\"p\",null,{\"children\":[\"Remove \",[\"$r\",\"code\",null,{\"children\":\"imageSize\"}],\" prop from all the components.\"]}],[\"$r\",\"p\",null,{\"children\":[\"Create and export \",[\"$r\",\"code\",null,{\"children\":\"ImageSizeContext\"}],\" from \",[\"$r\",\"code\",null,{\"children\":\"Context.js\"}],\". Then wrap the List into \",[\"$r\",\"code\",null,{\"children\":\"\u003cImageSizeContext value={imageSize}\u003e\"}],\" to pass the value down, and \",[\"$r\",\"code\",null,{\"children\":\"useContext(ImageSizeContext)\"}],\" to read it in the \",[\"$r\",\"code\",null,{\"children\":\"PlaceImage\"}],\":\"]}],[\"$r\",\"Sandpack\",null,{\"children\":[[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/App.js\",\"children\":\"import { useState, useContext } from 'react';\\nimport { places } from './data.js';\\nimport { getImageUrl } from './utils.js';\\nimport { ImageSizeContext } from './Context.js';\\n\\nexport default function App() {\\n const [isLarge, setIsLarge] = useState(false);\\n const imageSize = isLarge ? 150 : 100;\\n return (\\n \u003cImageSizeContext\\n value={imageSize}\\n \u003e\\n \u003clabel\u003e\\n \u003cinput\\n type=\\\"checkbox\\\"\\n checked={isLarge}\\n onChange={e =\u003e {\\n setIsLarge(e.target.checked);\\n }}\\n /\u003e\\n Use large images\\n \u003c/label\u003e\\n \u003chr /\u003e\\n \u003cList /\u003e\\n \u003c/ImageSizeContext\u003e\\n )\\n}\\n\\nfunction List() {\\n const listItems = places.map(place =\u003e\\n \u003cli key={place.id}\u003e\\n \u003cPlace place={place} /\u003e\\n \u003c/li\u003e\\n );\\n return \u003cul\u003e{listItems}\u003c/ul\u003e;\\n}\\n\\nfunction Place({ place }) {\\n return (\\n \u003c\u003e\\n \u003cPlaceImage place={place} /\u003e\\n \u003cp\u003e\\n \u003cb\u003e{place.name}\u003c/b\u003e\\n {': ' + place.description}\\n \u003c/p\u003e\\n \u003c/\u003e\\n );\\n}\\n\\nfunction PlaceImage({ place }) {\\n const imageSize = useContext(ImageSizeContext);\\n return (\\n \u003cimg\\n src={getImageUrl(place)}\\n alt={place.name}\\n width={imageSize}\\n height={imageSize}\\n /\u003e\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/Context.js\",\"children\":\"import { createContext } from 'react';\\n\\nexport const ImageSizeContext = createContext(500);\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/data.js\",\"children\":\"export const places = [{\\n id: 0,\\n name: 'Bo-Kaap in Cape Town, South Africa',\\n description: 'The tradition of choosing bright colors for houses began in the late 20th century.',\\n imageId: 'K9HVAGH'\\n}, {\\n id: 1, \\n name: 'Rainbow Village in Taichung, Taiwan',\\n description: 'To save the houses from demolition, Huang Yung-Fu, a local resident, painted all 1,200 of them in 1924.',\\n imageId: '9EAYZrt'\\n}, {\\n id: 2, \\n name: 'Macromural de Pachuca, Mexico',\\n description: 'One of the largest murals in the world covering homes in a hillside neighborhood.',\\n imageId: 'DgXHVwu'\\n}, {\\n id: 3, \\n name: 'Selarón Staircase in Rio de Janeiro, Brazil',\\n description: 'This landmark was created by Jorge Selarón, a Chilean-born artist, as a \\\"tribute to the Brazilian people\\\".',\\n imageId: 'aeO3rpI'\\n}, {\\n id: 4, \\n name: 'Burano, Italy',\\n description: 'The houses are painted following a specific color system dating back to 16th century.',\\n imageId: 'kxsph5C'\\n}, {\\n id: 5, \\n name: 'Chefchaouen, Marocco',\\n description: 'There are a few theories on why the houses are painted blue, including that the color repels mosquitos or that it symbolizes sky and heaven.',\\n imageId: 'rTqKo46'\\n}, {\\n id: 6,\\n name: 'Gamcheon Culture Village in Busan, South Korea',\\n description: 'In 2009, the village was converted into a cultural hub by painting the houses and featuring exhibitions and art installations.',\\n imageId: 'ZfQOOzf'\\n}];\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-js\",\"meta\":\"src/utils.js\",\"children\":\"export function getImageUrl(place) {\\n return (\\n 'https://i.imgur.com/' +\\n place.imageId +\\n 'l.jpg'\\n );\\n}\\n\"}]}],[\"$r\",\"pre\",null,{\"children\":[\"$r\",\"code\",null,{\"className\":\"language-css\",\"children\":\"ul { list-style-type: none; padding: 0px 10px; }\\nli { \\n margin-bottom: 10px; \\n display: grid; \\n grid-template-columns: auto 1fr;\\n gap: 20px;\\n align-items: center;\\n}\\n\"}]}]]}],[\"$r\",\"p\",null,{\"children\":[\"Note how components in the middle don’t need to pass \",[\"$r\",\"code\",null,{\"children\":\"imageSize\"}],\" anymore.\"]}]]}]]}]]","meta":{"title":"Passing Data Deeply with Context"},"languages":null},"__N_SSG":true},"page":"/[[...markdownPath]]","query":{"markdownPath":["learn","passing-data-deeply-with-context"]},"buildId":"3uPtO_P1aNtF_ZQSjeirn","isFallback":false,"gsp":true,"scriptLoader":[]}</script></body></html>