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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta name="viewport" content="width=device-width, initial-scale=1"/><link rel="preload" href="/_next/static/media/a34f9d1faa5f3315-s.p.woff2" as="font" crossorigin="" type="font/woff2"/><link rel="stylesheet" href="/_next/static/css/933c6f782897b379.css" data-precedence="next"/><link rel="preload" href="/_next/static/chunks/webpack-0d86c6ee39f56284.js" as="script" fetchPriority="low"/><script src="/_next/static/chunks/fd9d1056-0c5e6aafc398dd49.js" async=""></script><script src="/_next/static/chunks/864-3d47b83f5aa5c3ee.js" async=""></script><script src="/_next/static/chunks/main-app-8f13c08947745519.js" async=""></script><title>GraphQL Fragments - Episode #13</title><meta name="description" content="Screencasts teaching you how to build apps and backends with GraphQL."/><meta property="og:description" content="Learn how to work with GraphQL Fragments inside Queries and Mutations together with variables, and nested fragments."/><meta property="og:url" content="https://graphql.wtf/13-graphql-fragments"/><meta property="og:site_name" content="GraphQL WTF"/><meta property="og:image" content="https://graphql.wtf/episodes/13-graphql-fragments.png"/><meta property="og:image:width" content="1920"/><meta property="og:image:height" content="1080"/><meta property="og:type" content="video.episode"/><meta name="twitter:card" content="summary_large_image"/><meta name="twitter:description" content="Learn how to work with GraphQL Fragments inside Queries and Mutations together with variables, and nested fragments."/><meta name="twitter:image" content="https://graphql.wtf/episodes/13-graphql-fragments.png"/><meta name="twitter:image:width" content="1920"/><meta name="twitter:image:height" content="1080"/><meta name="next-size-adjust"/><script src="/_next/static/chunks/polyfills-c67a75d1b6f99dc8.js" noModule=""></script></head><body class="__variable_36bd41"><header class="max-w-7xl mx-auto p-6 md:py-10 z-50 relative"><nav class="flex items-center justify-between" aria-label="Global"><div class="flex lg:flex-1"><a class="-m-1.5 p-1.5 text-black" href="/"><span class="sr-only">graphql.wtf</span><img alt="GraphQL WTF" loading="lazy" width="265" height="60" decoding="async" data-nimg="1" class="h-9 w-auto fill-current" style="color:transparent" src="/_next/static/media/logo.b455edfe.svg"/></a></div><div class="flex lg:hidden"><button type="button" class="-m-2.5 inline-flex items-center justify-center rounded-md p-2.5 text-gray-700"><span class="sr-only">Open main menu</span><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" aria-hidden="true" class="h-6 w-6"><path stroke-linecap="round" stroke-linejoin="round" d="M3.75 6.75h16.5M3.75 12h16.5m-16.5 5.25h16.5"></path></svg></button></div><div class="hidden lg:flex lg:gap-x-12"><a class="text-sm font-semibold leading-6 text-black hover:text-primary" href="/">Free Episodes</a><a class="text-sm font-semibold leading-6 text-black hover:text-primary" href="/training">Training</a><a class="text-sm font-semibold leading-6 text-black hover:text-primary" href="/about">About</a></div><div class="hidden space-x-6 lg:flex lg:flex-1 lg:justify-end"></div></nav><div style="position:fixed;top:1px;left:1px;width:1px;height:0;padding:0;margin:-1px;overflow:hidden;clip:rect(0, 0, 0, 0);white-space:nowrap;border-width:0;display:none"></div></header><div class="relative z-20"><div class="mx-auto max-w-5xl"><div class="space-y-6 py-6 md:py-12 px-6"><div class="relative z-20 flex aspect-video items-center justify-center overflow-hidden bg-black md:rounded-md shadow-2xl"><template data-dgst="NEXT_DYNAMIC_NO_SSR_CODE"></template></div></div></div><div class="mx-auto max-w-3xl space-y-6 md:space-y-12 px-6"><div class="space-y-3 text-center"><h1 class="text-2xl font-bold tracking-tight text-black sm:text-3xl lg:text-4xl">GraphQL Fragments</h1><p class="flex items-center justify-center space-x-3 text-sm font-medium text-primary"><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" aria-hidden="true" class="h-5 w-5 text-primary"><path stroke-linecap="round" stroke-linejoin="round" d="M6.75 3v2.25M17.25 3v2.25M3 18.75V7.5a2.25 2.25 0 012.25-2.25h13.5A2.25 2.25 0 0121 7.5v11.25m-18 0A2.25 2.25 0 005.25 21h13.5A2.25 2.25 0 0021 18.75m-18 0v-7.5A2.25 2.25 0 015.25 9h13.5A2.25 2.25 0 0121 11.25v7.5"></path></svg><span>25 Oct 2021</span></p></div><div class="mx-auto max-w-3xl"><div class="prose max-w-none"><ul> <li><code>https://api.cartql.com</code></li> </ul> <pre><code class="language-graphql">fragment currencyFields on Currency { code symbol } fragment moneyFields on Money { amount currency { ...currencyFields } formatted } fragment cartInfo on Cart { id totalItems totalUniqueItems items { id name quantity unitTotal { ...moneyFields } lineTotal { ...moneyFields } } subTotal { ...moneyFields } } </code></pre> <pre><code class="language-graphql">query getCartById($id: ID!) { cart(id: $id) { ...cartInfo } } </code></pre> <pre><code class="language-graphql">mutation addItem($cartId: ID!) { addItem( input: { cartId: $cartId id: "new-item-id" name: "New product" price: 1000 } ) { ...cartInfo } } </code></pre></div></div></div></div><div class="fixed inset-0 z-0 h-full w-full bg-[radial-gradient(#e5e7eb_1px,transparent_1px)] [background-size:16px_16px] [mask-image:radial-gradient(ellipse_50%_50%_at_50%_50%,#000_70%,transparent_100%)]"></div><footer class="relative z-30"><div class="mx-auto mt-6 max-w-xl overflow-hidden border-t border-black/10 px-6 py-20 md:mt-12 lg:mt-32 lg:px-8"><div class="mt-10 flex justify-center space-x-10"><a href="https://www.tiktok.com/@graphqlwtf" class="text-black/50 transition hover:text-black/100" target="_blank" rel="noopener noreferrer"><span class="sr-only">TikTok</span><svg fill="currentColor" viewBox="0 0 24 24" class="h-6 w-6" 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