CINXE.COM
AI Help | MDN Plus
<!doctype html> <html lang="en-US" prefix="og: https://ogp.me/ns#"> <head> <base href="https://developer.mozilla.org/en-US/plus/ai-help"> <meta charset="utf-8"> <meta name="viewport" content="width=device-width,initial-scale=1"> <link rel="icon" href="https://developer.mozilla.org/favicon-48x48.bc390275e955dacb2e65.png"> <link rel="apple-touch-icon" href="https://developer.mozilla.org/apple-touch-icon.528534bba673c38049c2.png"> <meta name="theme-color" content="#ffffff"> <link rel="manifest" href="https://developer.mozilla.org/manifest.f42880861b394dd4dc9b.json"> <link rel="search" type="application/opensearchdescription+xml" href="/opensearch.xml" title="MDN Web Docs"> <title>AI Help | MDN Plus</title> <link rel="preload" as="font" type="font/woff2" href="/static/media/Inter.var.c2fe3cb2b7c746f7966a.woff2" crossorigin=""> <link rel="alternate" type="application/rss+xml" title="MDN Blog RSS Feed" href="https://developer.mozilla.org/en-US/blog/rss.xml" hreflang="en"> <meta name="description" content="The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps."> <meta property="og:url" content="https://developer.mozilla.org/en-US/plus/ai-help"> <meta property="og:title" content="AI Help | MDN Plus"> <meta property="og:type" content="website"> <meta property="og:locale" content="en_US"> <meta property="og:description" content="The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps."> <meta property="og:image" content="https://developer.mozilla.org/mdn-social-share.d893525a4fb5fb1f67a2.png"> <meta property="og:image:type" content="image/png"> <meta property="og:image:height" content="1080"> <meta property="og:image:width" content="1920"> <meta property="og:image:alt" content="The MDN Web Docs logo, featuring a blue accent color, displayed on a solid black background."> <meta property="og:site_name" content="MDN Web Docs"> <meta name="twitter:card" content="summary_large_image"> <meta name="twitter:creator" content="MozDevNet"> <link rel="canonical" href="https://developer.mozilla.org/en-US/plus/ai-help"> <style media="print">.article-actions-container,.document-toc-container,.language-menu,.main-menu-toggle,.on-github,.page-footer,.place,.sidebar,.top-banner,.top-navigation-main,ul.prev-next{display:none!important}.main-page-content,.main-page-content pre{padding:2px}.main-page-content pre{border-left-width:2px}</style> <script src="/static/js/gtag.js" defer></script> <script defer src="/static/js/main.30156711.js"></script> <link href="/static/css/main.f41bc727.css" rel="stylesheet"> <meta http-equiv="X-Translated-By" content="Google"> <meta http-equiv="X-Translated-To" content="fr"> <script type="text/javascript" src="https://www.gstatic.com/_/translate_http/_/js/k=translate_http.tr.en_GB.1_qyHg0XphE.O/am=DAY/d=1/rs=AN8SPfo_O3MiUOHLzIFK2FbMzbiipwQcbg/m=corsproxy" data-sourceurl="https://developer.mozilla.org/en-US/plus/ai-help"></script> <link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200" rel="stylesheet"> <script type="text/javascript" src="https://www.gstatic.com/_/translate_http/_/js/k=translate_http.tr.en_GB.1_qyHg0XphE.O/am=DAY/d=1/exm=corsproxy/ed=1/rs=AN8SPfo_O3MiUOHLzIFK2FbMzbiipwQcbg/m=phishing_protection" data-phishing-protection-enabled="false" data-forms-warning-enabled="true" data-source-url="https://developer.mozilla.org/en-US/plus/ai-help"></script> <meta name="robots" content="none"> </head> <body> <script type="text/javascript" src="https://www.gstatic.com/_/translate_http/_/js/k=translate_http.tr.en_GB.1_qyHg0XphE.O/am=DAY/d=1/exm=corsproxy,phishing_protection/ed=1/rs=AN8SPfo_O3MiUOHLzIFK2FbMzbiipwQcbg/m=navigationui" data-environment="prod" data-proxy-url="https://developer-mozilla-org.translate.goog" data-proxy-full-url="https://developer-mozilla-org.translate.goog/en-US/plus/ai-help?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" data-source-url="https://developer.mozilla.org/en-US/plus/ai-help" data-source-language="pl" data-target-language="fr" data-display-language="en-GB" data-detected-source-language="" data-is-source-untranslated="false" data-source-untranslated-url="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://developer.mozilla.org/en-US/plus/ai-help&anno=2" data-client="tr"></script> <script>if(document.body.addEventListener("load",(t=>{t.target.classList.contains("interactive")&&t.target.setAttribute("data-readystate","complete")}),{capture:!0}),window&&document.documentElement){const t={light:"#ffffff",dark:"#1b1b1b"};try{const e=window.localStorage.getItem("theme");e&&(document.documentElement.className=e,document.documentElement.style.backgroundColor=t[e]);const o=window.localStorage.getItem("nop");o&&(document.documentElement.dataset.nop=o)}catch(t){console.warn("Unable to read theme from localStorage",t)}}</script> <div id="root"> <ul id="nav-access" class="a11y-nav"> <li><a id="skip-main" href="https://developer-mozilla-org.translate.goog/en-US/plus/ai-help?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB#content">Skip to main content</a></li> <li><a id="skip-search" href="https://developer-mozilla-org.translate.goog/en-US/plus/ai-help?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB#top-nav-search-input">Skip to search</a></li> </ul> <div class="page-wrapper standard-page plus"> <div class="top-banner loading"> <section class="place top container"></section> </div> <div class="sticky-header-container without-actions"> <header class="top-navigation "> <div class="container "> <div class="top-navigation-wrap"> <a href="https://developer-mozilla-org.translate.goog/en-US/?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="logo" aria-label="MDN homepage"> <svg id="mdn-plus-logo" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 522.3 104.6" style="enable-background:new 0 0 522.3 104.6" xml:space="preserve" role="img"> <title>MDN Plus</title><path d="M40.3 0 11.7 92.1H0L28.5 0Zm10.4 0v92.1H40.3V0ZM91 0 62.5 92.1H50.8L79.3 0Zm10.4 0v92.1H91V0Z" class="logo-m"></path><path d="M455.3 95.8h67v8.8h-67z" class="logo-_"></path><path d="M348.7 53.6c0 5-1.4 9.6-4.1 13.8-2.7 4.2-7 6.2-13 6.2-5.5 0-9.5-2-12-6v16.8h8.1v5.7h-21.4v-5.7h6.1V42h-6.3v-5.6h13.6v7.4c1.1-2.2 2.7-4.1 4.7-5.7 2.1-1.6 4.8-2.4 8.2-2.4 4.8 0 8.6 1.6 11.6 4.8 3 3.1 4.5 7.5 4.5 13.1zm-7.6.7c0-4.2-1-7.4-3-9.5-2-2.2-4.5-3.3-7.6-3.3-3.2 0-5.7 1.2-7.7 3.7-1.9 2.4-3 5.1-3.1 7.9l-.1 4.2c0 3 1 5.5 3 7.5s4.5 2.9 7.4 2.9c3.7 0 6.5-1.3 8.3-3.9 1.9-2.5 2.8-5.7 2.8-9.5zm29.7 18.5h-19.3v-5.5h6v-45h-6.2v-5.6h13.6v50.6h6v5.5h-.1zm46 0h-13.6v-6.5c-2.6 4.9-6.7 7.3-12.6 7.3-3.6 0-6.7-1.1-9.2-3.3-2.5-2.2-3.8-5.6-3.8-10.3V42h-6v-5.6H385v21.4c0 3.7.7 6.3 2.2 7.8s3.5 2.3 6 2.3c3 0 5.4-1.1 7.2-3.2 1.8-2.1 2.8-4.5 2.8-7.1V42H396v-5.6h14.6v30.9h6.2v5.5zm33.6-10.7c0 3.6-1.5 6.5-4.6 8.5s-7 3-11.7 3c-5.7 0-10.6-1.2-14.6-3.6l1.2-8.8 5.7.6-.2 4.7c1.1.5 2.3.9 3.6 1.1 1.3.2 2.6.3 3.9.3 2.4 0 4.5-.4 6.5-1.3 1.9-.9 2.9-2.2 2.9-4.1 0-1.8-.8-3.1-2.3-3.8s-3.5-1.3-5.8-1.7-4.6-.9-6.9-1.4c-2.3-.6-4.2-1.6-5.7-2.9-1.6-1.4-2.3-3.5-2.3-6.3 0-4.1 1.5-6.9 4.6-8.5s6.4-2.4 9.9-2.4c2.6 0 5 .3 7.2.9 2.2.6 4.3 1.4 6.1 2.4l.8 8.8-5.8.7-.8-5.7c-2.3-1-4.7-1.6-7.2-1.6-2.1 0-3.7.4-5.1 1.1-1.3.8-2 2-2 3.8 0 1.7.8 2.9 2.3 3.6 1.5.7 3.4 1.2 5.7 1.6 2.2.4 4.5.8 6.7 1.4 2.2.6 4.1 1.6 5.7 3 1.5 1.6 2.2 3.7 2.2 6.6zM197.6 73.2h-17.1v-5.5h3.8V51.9c0-3.7-.7-6.3-2.1-7.9-1.4-1.6-3.3-2.3-5.7-2.3-3.2 0-5.6 1.1-7.2 3.4s-2.4 4.6-2.5 6.9v15.6h6v5.5h-17.1v-5.5h3.8V51.9c0-3.8-.7-6.4-2.1-7.9-1.4-1.5-3.3-2.3-5.6-2.3-3.2 0-5.5 1.1-7.2 3.3-1.6 2.2-2.4 4.5-2.5 6.9v15.8h6.9v5.5h-20.2v-5.5h6V42.4h-6.1v-5.6h13.4v6.4c1.2-2.1 2.7-3.8 4.7-5.2 2-1.3 4.4-2 7.3-2s5.3.7 7.5 2.1c2.2 1.4 3.7 3.5 4.5 6.4 1.1-2.5 2.7-4.5 4.9-6.1s4.8-2.4 7.9-2.4c3.5 0 6.5 1.1 8.9 3.3s3.7 5.6 3.7 10.2v18.2h6.1v5.5zm42.5 0h-13.2V66c-1.2 2.2-2.8 4.1-4.9 5.6-2.1 1.6-4.8 2.4-8.3 2.4-4.8 0-8.7-1.6-11.6-4.9-2.9-3.2-4.3-7.7-4.3-13.3 0-5 1.3-9.6 4-13.7 2.6-4.1 6.9-6.2 12.8-6.2s9.8 2.2 12.3 6.5V22.7h-8.6v-5.6h15.8v50.6h6v5.5zm-13.3-16.8V52c-.1-3-1.2-5.5-3.2-7.3s-4.4-2.8-7.2-2.8c-3.6 0-6.3 1.3-8.2 3.9-1.9 2.6-2.8 5.8-2.8 9.6 0 4.1 1 7.3 3 9.5s4.5 3.3 7.4 3.3c3.2 0 5.8-1.3 7.8-3.8 2.1-2.6 3.1-5.3 3.2-8zm61.5 16.8H269v-5.5h6V51.9c0-3.7-.7-6.3-2.2-7.9-1.4-1.6-3.4-2.3-5.7-2.3-3.1 0-5.6 1-7.4 3s-2.8 4.4-2.9 7v15.9h6v5.5h-19.3v-5.5h6V42.4h-6.2v-5.6h13.6V43c2.6-4.6 6.8-6.9 12.7-6.9 3.6 0 6.7 1.1 9.2 3.3s3.7 5.6 3.7 10.2v18.2h6v5.4h-.2z" class="logo-text"></path> </svg></a><button title="Open main menu" type="button" class="button action has-icon main-menu-toggle" aria-haspopup="menu" aria-label="Open main menu" aria-expanded="false"><span class="button-wrap"><span class="icon icon-menu "></span><span class="visually-hidden">Open main menu</span></span></button> </div> <div class="top-navigation-main"> <nav class="main-nav" aria-label="Main menu"> <ul class="main-menu nojs"> <li class="top-level-entry-container "><button type="button" id="references-button" class="top-level-entry menu-toggle" aria-controls="references-menu" aria-expanded="false">References</button><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Web?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="top-level-entry">References</a> <ul id="references-menu" class="submenu references hidden inline-submenu-lg" aria-labelledby="references-button"> <li class="apis-link-container mobile-only "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Web?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Overview / Web Technology </div> <p class="submenu-item-description">Web technology reference for developers</p> </div></a></li> <li class="html-link-container "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Web/HTML?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon html"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> HTML </div> <p class="submenu-item-description">Structure of content on the web</p> </div></a></li> <li class="css-link-container "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Web/CSS?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon css"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> CSS </div> <p class="submenu-item-description">Code used to describe document style</p> </div></a></li> <li class="javascript-link-container "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Web/JavaScript?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon javascript"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> JavaScript </div> <p class="submenu-item-description">General-purpose scripting language</p> </div></a></li> <li class="http-link-container "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Web/HTTP?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon http"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> HTTP </div> <p class="submenu-item-description">Protocol for transmitting web resources</p> </div></a></li> <li class="apis-link-container "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Web/API?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon apis"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Web APIs </div> <p class="submenu-item-description">Interfaces for building web applications</p> </div></a></li> <li class="apis-link-container "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Mozilla/Add-ons/WebExtensions?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Web Extensions </div> <p class="submenu-item-description">Developing extensions for web browsers</p> </div></a></li> <li class="apis-link-container desktop-only "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Web?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Web Technology </div> <p class="submenu-item-description">Web technology reference for developers</p> </div></a></li> </ul></li> <li class="top-level-entry-container "><button type="button" id="guides-button" class="top-level-entry menu-toggle" aria-controls="guides-menu" aria-expanded="false">Guides</button><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Learn?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="top-level-entry">Guides</a> <ul id="guides-menu" class="submenu guides hidden inline-submenu-lg" aria-labelledby="guides-button"> <li class="apis-link-container mobile-only "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Learn?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon learn"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Overview / MDN Learning Area </div> <p class="submenu-item-description">Learn web development</p> </div></a></li> <li class="apis-link-container desktop-only "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Learn?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon learn"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> MDN Learning Area </div> <p class="submenu-item-description">Learn web development</p> </div></a></li> <li class="html-link-container "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Learn/HTML?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon html"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> HTML </div> <p class="submenu-item-description">Learn to structure web content with HTML</p> </div></a></li> <li class="css-link-container "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Learn/CSS?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon css"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> CSS </div> <p class="submenu-item-description">Learn to style content using CSS</p> </div></a></li> <li class="javascript-link-container "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Learn/JavaScript?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon javascript"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> JavaScript </div> <p class="submenu-item-description">Learn to run scripts in the browser</p> </div></a></li> <li class=" "><a href="https://developer-mozilla-org.translate.goog/en-US/docs/Web/Accessibility?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Accessibility </div> <p class="submenu-item-description">Learn to make the web accessible to all</p> </div></a></li> </ul></li> <li class="top-level-entry-container "><button type="button" id="mdn-plus-button" class="top-level-entry menu-toggle" aria-controls="mdn-plus-menu" aria-expanded="false">Plus</button><a href="https://developer-mozilla-org.translate.goog/en-US/plus?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="top-level-entry">Plus</a> <ul id="mdn-plus-menu" class="submenu mdn-plus hidden inline-submenu-lg" aria-labelledby="mdn-plus-button"> <li class=" "><a href="https://developer-mozilla-org.translate.goog/en-US/plus?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Overview </div> <p class="submenu-item-description">A customized MDN experience</p> </div></a></li> <li class=" "><a href="https://developer-mozilla-org.translate.goog/en-US/plus/ai-help?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> AI Help </div> <p class="submenu-item-description">Get real-time assistance and support</p> </div></a></li> <li class=" "><a href="https://developer-mozilla-org.translate.goog/en-US/plus/updates?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Updates </div> <p class="submenu-item-description">All browser compatibility updates at a glance</p> </div></a></li> <li class=" "><a href="https://developer-mozilla-org.translate.goog/en-US/plus/docs/features/overview?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Documentation </div> <p class="submenu-item-description">Learn how to use MDN Plus</p> </div></a></li> <li class=" "><a href="https://developer-mozilla-org.translate.goog/en-US/plus/docs/faq?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> FAQ </div> <p class="submenu-item-description">Frequently asked questions about MDN Plus</p> </div></a></li> </ul></li> <li class="top-level-entry-container "><a class="top-level-entry menu-link" href="https://developer-mozilla-org.translate.goog/en-US/curriculum/?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">Curriculum <sup class="new">New</sup></a></li> <li class="top-level-entry-container "><a class="top-level-entry menu-link" href="https://developer-mozilla-org.translate.goog/en-US/blog/?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">Blog</a></li> <li class="top-level-entry-container active"><button type="button" id="tools-button" class="top-level-entry menu-toggle" aria-controls="tools-menu" aria-expanded="false">Tools</button> <ul id="tools-menu" class="submenu tools hidden inline-submenu-lg" aria-labelledby="tools-button"> <li class=" "><a href="https://developer-mozilla-org.translate.goog/en-US/play?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> Playground </div> <p class="submenu-item-description">Write, test and share your code</p> </div></a></li> <li class=" "><a href="https://developer-mozilla-org.translate.goog/en-US/observatory?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> HTTP Observatory </div> <p class="submenu-item-description">Scan a website for free</p> </div></a></li> <li class=" "><a href="https://developer-mozilla-org.translate.goog/en-US/plus/ai-help?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="submenu-item "> <div class="submenu-icon"></div> <div class="submenu-content-container"> <div class="submenu-item-heading"> AI Help </div> <p class="submenu-item-description">Get real-time assistance and support</p> </div></a></li> </ul></li> </ul> </nav> <div class="header-search"> <form action="/en-US/search" class="search-form search-widget" id="top-nav-search-form" role="search"> <label id="top-nav-search-label" for="top-nav-search-input" class="visually-hidden">Search MDN</label><input aria-activedescendant="" aria-autocomplete="list" aria-controls="top-nav-search-menu" aria-expanded="false" aria-labelledby="top-nav-search-label" autocomplete="off" id="top-nav-search-input" role="combobox" type="search" class="search-input-field" name="q" placeholder=" " required value=""><button type="button" class="button action has-icon clear-search-button"><span class="button-wrap"><span class="icon icon-cancel "></span><span class="visually-hidden">Clear search input</span></span></button><button type="submit" class="button action has-icon search-button"><span class="button-wrap"><span class="icon icon-search "></span><span class="visually-hidden">Search</span></span></button> <div id="top-nav-search-menu" role="listbox" aria-labelledby="top-nav-search-label"></div> </form> </div> <div class="theme-switcher-menu"> <button type="button" class="button action has-icon theme-switcher-menu small" aria-haspopup="menu"><span class="button-wrap"><span class="icon icon-theme-os-default "></span>Theme</span></button> </div> <ul class="auth-container"> <li><a href="https://developer-mozilla-org.translate.goog/users/fxa/login/authenticate/?next=/en-US/plus/ai-help&_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="login-link" rel="nofollow">Log in</a></li> <li><a href="https://developer-mozilla-org.translate.goog/users/fxa/login/authenticate/?next=/en-US/plus/ai-help&_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" target="_self" rel="nofollow" class="button primary mdn-plus-subscribe-link"><span class="button-wrap">Sign up for free</span></a></li> </ul> </div> </div> </header> </div> <main id="content" class="main-content "> <div class="generic-loading" style="min-height:800px"> <p></p> </div> </main> </div> <footer id="nav-footer" class="page-footer"> <div class="page-footer-grid"> <div class="page-footer-logo-col"> <a href="https://developer-mozilla-org.translate.goog/?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" class="mdn-footer-logo" aria-label="MDN homepage"> <svg width="48" height="17" viewbox="0 0 48 17" fill="none" xmlns="http://www.w3.org/2000/svg"> <title id="mdn-footer-logo-svg">MDN logo</title><path d="M20.04 16.512H15.504V10.416C15.504 9.488 15.344 8.824 15.024 8.424C14.72 8.024 14.264 7.824 13.656 7.824C12.92 7.824 12.384 8.064 12.048 8.544C11.728 9.024 11.568 9.64 11.568 10.392V14.184H13.008V16.512H8.472V10.416C8.472 9.488 8.312 8.824 7.992 8.424C7.688 8.024 7.232 7.824 6.624 7.824C5.872 7.824 5.336 8.064 5.016 8.544C4.696 9.024 4.536 9.64 4.536 10.392V14.184H6.6V16.512H0V14.184H1.44V8.04H0.024V5.688H4.536V7.32C5.224 6.088 6.32 5.472 7.824 5.472C8.608 5.472 9.328 5.664 9.984 6.048C10.64 6.432 11.096 7.016 11.352 7.8C11.992 6.248 13.168 5.472 14.88 5.472C15.856 5.472 16.72 5.776 17.472 6.384C18.224 6.992 18.6 7.936 18.6 9.216V14.184H20.04V16.512Z" fill="currentColor"></path><path d="M33.6714 16.512H29.1354V14.496C28.8314 15.12 28.3834 15.656 27.7914 16.104C27.1994 16.536 26.4154 16.752 25.4394 16.752C24.0154 16.752 22.8954 16.264 22.0794 15.288C21.2634 14.312 20.8554 12.984 20.8554 11.304C20.8554 9.688 21.2554 8.312 22.0554 7.176C22.8554 6.04 24.0634 5.472 25.6794 5.472C26.5594 5.472 27.2794 5.648 27.8394 6C28.3994 6.352 28.8314 6.8 29.1354 7.344V2.352H26.9754V0H32.2314V14.184H33.6714V16.512ZM29.1354 11.04V10.776C29.1354 9.88 28.8954 9.184 28.4154 8.688C27.9514 8.176 27.3674 7.92 26.6634 7.92C25.9754 7.92 25.3674 8.176 24.8394 8.688C24.3274 9.2 24.0714 10.008 24.0714 11.112C24.0714 12.152 24.3114 12.944 24.7914 13.488C25.2714 14.032 25.8394 14.304 26.4954 14.304C27.3114 14.304 27.9514 13.96 28.4154 13.272C28.8954 12.584 29.1354 11.84 29.1354 11.04Z" fill="currentColor"></path><path d="M47.9589 16.512H41.9829V14.184H43.4229V10.416C43.4229 9.488 43.2629 8.824 42.9429 8.424C42.6389 8.024 42.1829 7.824 41.5749 7.824C40.8389 7.824 40.2709 8.056 39.8709 8.52C39.4709 8.968 39.2629 9.56 39.2469 10.296V14.184H40.6869V16.512H34.7109V14.184H36.1509V8.04H34.5909V5.688H39.2469V7.344C39.9669 6.096 41.1269 5.472 42.7269 5.472C43.7509 5.472 44.6389 5.776 45.3909 6.384C46.1429 6.992 46.5189 7.936 46.5189 9.216V14.184H47.9589V16.512Z" fill="currentColor"></path> </svg></a> <p>Your blueprint for a better internet.</p> <ul class="social-icons"> <li><a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://mastodon.social/@mdn" target="_blank" rel="me noopener noreferrer"><span class="icon icon-mastodon"></span><span class="visually-hidden">MDN on Mastodon</span></a></li> <li><a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://twitter.com/mozdevnet" target="_blank" rel="noopener noreferrer"><span class="icon icon-twitter-x"></span><span class="visually-hidden">MDN on X (formerly Twitter)</span></a></li> <li><a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://github.com/mdn/" target="_blank" rel="noopener noreferrer"><span class="icon icon-github-mark-small"></span><span class="visually-hidden">MDN on GitHub</span></a></li> <li><a href="https://developer-mozilla-org.translate.goog/en-US/blog/rss.xml?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" target="_blank"><span class="icon icon-feed"></span><span class="visually-hidden">MDN Blog RSS Feed</span></a></li> </ul> </div> <div class="page-footer-nav-col-1"> <h2 class="footer-nav-heading">MDN</h2> <ul class="footer-nav-list"> <li class="footer-nav-item"><a href="https://developer-mozilla-org.translate.goog/en-US/about?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">About</a></li> <li class="footer-nav-item"><a href="https://developer-mozilla-org.translate.goog/en-US/blog/?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">Blog</a></li> <li class="footer-nav-item"><a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://www.mozilla.org/en-US/careers/listings/?team%3DProdOps" target="_blank" rel="noopener noreferrer">Careers</a></li> <li class="footer-nav-item"><a href="https://developer-mozilla-org.translate.goog/en-US/advertising?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">Advertise with us</a></li> </ul> </div> <div class="page-footer-nav-col-2"> <h2 class="footer-nav-heading">Support</h2> <ul class="footer-nav-list"> <li class="footer-nav-item"><a class="footer-nav-link" href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://support.mozilla.org/products/mdn-plus">Product help</a></li> <li class="footer-nav-item"><a class="footer-nav-link" href="https://developer-mozilla-org.translate.goog/en-US/docs/MDN/Community/Issues?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">Report an issue</a></li> </ul> </div> <div class="page-footer-nav-col-3"> <h2 class="footer-nav-heading">Our communities</h2> <ul class="footer-nav-list"> <li class="footer-nav-item"><a class="footer-nav-link" href="https://developer-mozilla-org.translate.goog/en-US/community?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">MDN Community</a></li> <li class="footer-nav-item"><a class="footer-nav-link" href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://discourse.mozilla.org/c/mdn/236" target="_blank" rel="noopener noreferrer">MDN Forum</a></li> <li class="footer-nav-item"><a class="footer-nav-link" href="https://developer-mozilla-org.translate.goog/discord?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB" target="_blank" rel="noopener noreferrer">MDN Chat</a></li> </ul> </div> <div class="page-footer-nav-col-4"> <h2 class="footer-nav-heading">Developers</h2> <ul class="footer-nav-list"> <li class="footer-nav-item"><a class="footer-nav-link" href="https://developer-mozilla-org.translate.goog/en-US/docs/Web?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">Web Technologies</a></li> <li class="footer-nav-item"><a class="footer-nav-link" href="https://developer-mozilla-org.translate.goog/en-US/docs/Learn?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">Learn Web Development</a></li> <li class="footer-nav-item"><a class="footer-nav-link" href="https://developer-mozilla-org.translate.goog/en-US/plus?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">MDN Plus</a></li> <li class="footer-nav-item"><a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://hacks.mozilla.org/" target="_blank" rel="noopener noreferrer">Hacks Blog</a></li> </ul> </div> <div class="page-footer-moz"> <a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://www.mozilla.org/" class="footer-moz-logo-link" target="_blank" rel="noopener noreferrer"> <svg width="112" height="32" fill="none" xmlns="http://www.w3.org/2000/svg"> <title id="mozilla-footer-logo-svg">Mozilla logo</title><path d="M41.753 14.218c-2.048 0-3.324 1.522-3.324 4.157 0 2.423 1.119 4.286 3.29 4.286 2.082 0 3.447-1.678 3.447-4.347 0-2.826-1.522-4.096-3.413-4.096Zm54.89 7.044c0 .901.437 1.618 1.645 1.618 1.427 0 2.949-1.024 3.044-3.352-.649-.095-1.365-.185-2.02-.185-1.426-.005-2.668.397-2.668 1.92Z" fill="currentColor"></path><path d="M0 0v32h111.908V0H0Zm32.56 25.426h-5.87v-7.884c0-2.423-.806-3.352-2.39-3.352-1.924 0-2.702 1.365-2.702 3.324v4.868h1.864v3.044h-5.864v-7.884c0-2.423-.806-3.352-2.39-3.352-1.924 0-2.702 1.365-2.702 3.324v4.868h2.669v3.044H6.642v-3.044h1.863v-7.918H6.642V11.42h5.864v2.11c.839-1.489 2.3-2.39 4.252-2.39 2.02 0 3.878.963 4.566 3.01.778-1.862 2.361-3.01 4.566-3.01 2.512 0 4.812 1.522 4.812 4.84v6.402h1.863v3.044h-.005Zm9.036.307c-4.314 0-7.296-2.635-7.296-7.106 0-4.096 2.484-7.481 7.514-7.481s7.481 3.38 7.481 7.29c0 4.472-3.228 7.297-7.699 7.297Zm22.578-.307H51.942l-.403-2.11 7.7-8.846h-4.376l-.621 2.17-2.888-.313.498-4.907h12.294l.313 2.11-7.767 8.852h4.533l.654-2.172 3.167.308-.872 4.908Zm7.99 0h-4.191v-5.03h4.19v5.03Zm0-8.976h-4.191v-5.03h4.19v5.03Zm2.618 8.976 6.054-21.358h3.945l-6.054 21.358h-3.945Zm8.136 0 6.048-21.358h3.945l-6.054 21.358h-3.939Zm21.486.307c-1.863 0-2.887-1.085-3.072-2.792-.805 1.427-2.232 2.792-4.498 2.792-2.02 0-4.314-1.085-4.314-4.006 0-3.447 3.323-4.253 6.518-4.253.778 0 1.584.034 2.3.124v-.465c0-1.427-.034-3.133-2.3-3.133-.84 0-1.488.061-2.143.402l-.453 1.578-3.195-.34.549-3.224c2.45-.996 3.692-1.27 5.992-1.27 3.01 0 5.556 1.55 5.556 4.75v6.083c0 .805.314 1.085.963 1.085.184 0 .375-.034.587-.095l.034 2.11a5.432 5.432 0 0 1-2.524.654Z" fill="currentColor"></path> </svg></a> <ul class="footer-moz-list"> <li class="footer-moz-item"><a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://www.mozilla.org/privacy/websites/" class="footer-moz-link" target="_blank" rel="noopener noreferrer">Website Privacy Notice</a></li> <li class="footer-moz-item"><a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://www.mozilla.org/privacy/websites/%23cookies" class="footer-moz-link" target="_blank" rel="noopener noreferrer">Cookies</a></li> <li class="footer-moz-item"><a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://www.mozilla.org/about/legal/terms/mozilla" class="footer-moz-link" target="_blank" rel="noopener noreferrer">Legal</a></li> <li class="footer-moz-item"><a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://www.mozilla.org/about/governance/policies/participation/" class="footer-moz-link" target="_blank" rel="noopener noreferrer">Community Participation Guidelines</a></li> </ul> </div> <div class="page-footer-legal"> <p id="license" class="page-footer-legal-text">Visit<!-- --> <a href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://www.mozilla.org" target="_blank" rel="noopener noreferrer">Mozilla Corporation’s</a> <!-- -->not-for-profit parent, the<!-- --> <a target="_blank" rel="noopener noreferrer" href="https://translate.google.com/website?sl=pl&tl=fr&hl=en-GB&u=https://foundation.mozilla.org/">Mozilla Foundation</a>.<br> Portions of this content are ©1998–<!-- -->2024<!-- --> by individual mozilla.org contributors. Content available under<!-- --> <a href="https://developer-mozilla-org.translate.goog/en-US/docs/MDN/Writing_guidelines/Attrib_copyright_license?_x_tr_sl=pl&_x_tr_tl=fr&_x_tr_hl=en-GB">a Creative Commons license</a>.</p> </div> </div> </footer> </div> <script type="application/json" id="hydration">{"url":"/en-US/plus/ai-help"}</script> <script>function gtElInit() {var lib = new google.translate.TranslateService();lib.translatePage('pl', 'fr', function () {});}</script> <script src="https://translate.google.com/translate_a/element.js?cb=gtElInit&hl=en-GB&client=wt" type="text/javascript"></script> </body> </html>