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<html lang="en" dir="ltr" class="docs-wrapper docs-doc-page docs-version-current plugin-docs plugin-id-default docs-doc-id-datahub-web-react/CLAUDE" data-has-hydrated="false">
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<title data-rh="true">CLAUDE.md | DataHub</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://docs.datahub.com/docs/datahub-web-react/claude"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="CLAUDE.md | DataHub"><meta data-rh="true" name="description" content="This file provides guidance to Claude Code (claude.ai/code) when working with code in this directory."><meta data-rh="true" property="og:description" content="This file provides guidance to Claude Code (claude.ai/code) when working with code in this directory."><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://docs.datahub.com/docs/datahub-web-react/claude"><link data-rh="true" rel="alternate" href="https://docs.datahub.com/docs/datahub-web-react/claude" hreflang="en"><link data-rh="true" rel="alternate" href="https://docs.datahub.com/docs/datahub-web-react/claude" hreflang="x-default"><link data-rh="true" rel="preconnect" href="https://RK0UG797F3-dsn.algolia.net" crossorigin="anonymous"><link rel="alternate" type="application/rss+xml" href="/learn/rss.xml" title="DataHub RSS Feed">
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<div role="region" aria-label="Skip to main content"><a class="skipToContent_fXgn" href="#__docusaurus_skipToContent_fallback">Skip to main content</a></div><div class="announcementBar_mb4j" style="background-color:transparent;color:#ffffff" role="banner"><div class="content_knG7 announcementBarContent_xLdY"><div class="shimmer-banner"><p>DataHub Secures $35 Million Series B</p><a href="https://datahub.com/news/series-b-announcement/" target="_blank" class="button"><div>Read the announcement<span> →</span></div></a></div></div></div><nav aria-label="Main" class="navbar navbar--fixed-top"><div class="navbar__inner"><div class="navbar__items"><button aria-label="Toggle navigation bar" aria-expanded="false" class="navbar__toggle clean-btn" type="button"><svg width="30" height="30" viewBox="0 0 30 30" aria-hidden="true"><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><a href="https://datahub.com" target="_blank" rel="noopener noreferrer" class="navbar__brand"><div class="navbar__logo"><img src="/img/datahub-logo-color-light-horizontal.svg" alt="DataHub Logo" class="themedImage_ToTc themedImage--light_HNdA"><img src="/img/datahub-logo-color-dark-horizontal.svg" alt="DataHub Logo" class="themedImage_ToTc themedImage--dark_i4oU"></div></a><div class="navbar__item dropdown dropdown--hoverable"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link versionNavItem_cbn8">Next</a><ul class="dropdown__menu"><li><a aria-current="page" class="dropdown__link dropdown__link--active" href="/docs/datahub-web-react/claude">Next</a></li><li><a class="dropdown__link" href="/docs/1.1.0/features">1.1.0</a></li><li><hr class="dropdown-separator" style="margin: 0.4rem;"></li><li><div class="dropdown__link"><b>Archived versions</b></div></li><li>
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<svg width="12" height="12" aria-hidden="true" viewBox="0 0 24 24"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg>
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</li></ul></div></div><div class="navbar__items navbar__items--right"><a aria-current="page" class="navbar__item navbar__link navbar__link--active" href="/docs">Docs</a><a class="navbar__item navbar__link" href="/integrations">Integrations</a><div class="navbar__item dropdown dropdown--hoverable"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link">Learn</a><ul class="dropdown__menu dropdown__menu_Z8FC"><div class="wrapper_kp81"><div><a href="https://datahub.com/weekly-demo" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-join-slack.png" alt="Weekly Demo"></div><div class="title_c7DP">Weekly Demo</div></a></div><div><a href="https://datahub.com/use-cases" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-forum.png" alt="Use Cases"></div><div class="title_c7DP">Use Cases</div></a></div><div><a href="httpps://datahub.com/adoption-stories" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-events.png" alt="Adoption Stories"></div><div class="title_c7DP">Adoption Stories</div></a></div><div><a href="https://medium.com/datahub-project" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-champions.png" alt="Blog"></div><div class="title_c7DP">Blog</div></a></div><div><a href="https://www.youtube.com/channel/UC3qFQC5IiwR5fvWEqi_tJ5w" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-share-your-journey.png" alt="Youtube"></div><div class="title_c7DP">Youtube</div></a></div></div></ul></div><div class="navbar__item dropdown dropdown--hoverable"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link">Community</a><ul class="dropdown__menu dropdown__menu_Z8FC"><div class="wrapper_kp81"><div><a href="https://datahub.com/slack/" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-join-slack.png" alt="Join Slack"></div><div class="title_c7DP">Join Slack</div></a></div><div><a href="https://datahub.com/events" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-events.png" alt="Events"></div><div class="title_c7DP">Events</div></a></div><div><a href="https://datahub.com/champions/" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-champions.png" alt="Champions"></div><div class="title_c7DP">Champions</div></a></div><div><a href="https://datahub.com/share-your-journey/" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-share-your-journey.png" alt="Share Your Journey"></div><div class="title_c7DP">Share Your Journey</div></a></div></div></ul></div><a href="https://datahub.com/products/why-datahub-cloud/" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link">
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<style>
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.cloud-cta {
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color: var(--ifm-menu-color-active);
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font-weight: 600;
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background: linear-gradient(40deg, var(--ifm-menu-color-active), var(--ifm-menu-color-active));
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background-size: 200% 100%;
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-webkit-background-clip: text;
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background-clip: text;
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transition: background-image 0.3s ease;
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}
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.cloud-cta:hover {
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color: transparent;
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background: linear-gradient(40deg, var(--ifm-menu-color-active), #ff1493);
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background-size: 200% 100%;
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-webkit-background-clip: text;
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background-clip: text;
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animation: gradientShift 3s ease infinite;
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}
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@keyframes gradientShift {
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0%, 100% { background-position: 0% 50%; }
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50% { background-position: 100% 50%; }
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}
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</style>
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<div class="cloud-cta">Get Cloud</div>
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</a><a href="https://datahub.com/slack?utm_source=docs&utm_medium=header&utm_campaign=docs_header" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link">
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<style>
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.slack-logo:hover {
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opacity: 0.8;
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}
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</style>
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<img class="slack-logo" src="https://upload.wikimedia.org/wikipedia/commons/d/d5/Slack_icon_2019.svg" , alt="slack" , height="20px" style="margin: 10px 0 0 0;">
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</a><div class="searchBox_ZlJk"><button type="button" class="DocSearch DocSearch-Button" aria-label="Search"><span class="DocSearch-Button-Container"><svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20" aria-hidden="true"><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" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">Search</span></span><span class="DocSearch-Button-Keys"></span></button></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_z2l0 docsWrapper_BCFX"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docPage__5DB"><main class="docMainContainer_gTbr docMainContainerEnhanced_Uz_u"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><span class="theme-doc-version-badge badge badge--secondary">Version: Next</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>CLAUDE.md</h1><p>This file provides guidance to Claude Code (claude.ai/code) when working with code in this directory.
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It also contains our style guide, which can be consumed by engineers.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="style-guide">Style Guide<a href="#style-guide" class="hash-link" aria-label="Direct link to Style Guide" title="Direct link to Style Guide"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="file-structure">File Structure<a href="#file-structure" class="hash-link" aria-label="Direct link to File Structure" title="Direct link to File Structure"></a></h3><ul><li>What should our top-level folders be?<ul><li><code>app</code>: components that implement the entire application<ul><li>Based on nav page</li><li>Each new high-level page gets a new top-level folder</li><li>Nested pages are within the same top-level folder</li></ul></li><li><code>graphql</code>: graphql files and generated types</li><li><code>images</code>: all custom images</li><li><code>conf</code> / <code>fonts</code> / <code>providers</code> / <code>utils</code>: do we need these?</li><li>When do we create a new one?</li></ul></li><li>What to put in <code>index.ts(x)</code>?<ul><li>Do not create these files</li></ul></li><li>Where to put tests?<ul><li>In <code>__tests__/</code> in the same directory as the file</li><li>Named <code>OriginalFile.test.ts(x)</code></li></ul></li><li>Where to put utils?<ul><li>For utils used in a single file: <code>SourceFile.utils.ts</code></li><li>For utils used in a folder: <code>folderName/folderName.utils.ts</code></li></ul></li><li>Where to put hooks?<ul><li>For helper hooks used in a single file: <code>SourceFile.hooks.ts(x)</code></li><li>For standalone, reusable hooks: <code>hookName.ts(x)</code></li><li>Try not to write hooks that generate JSX, but sometimes it may make sense</li></ul></li><li>Where to put types?<ul><li>Types only used once should be in the same file where they’re used</li><li>Shared types go in <code>folderName/folderName.types.ts</code></li></ul></li><li>Where to put helper components?<ul><li>If the component is only used once and is small: <code>parent/SourceFile.components.tsx</code><ul><li>e.g. <code>search/SearchPage.components.tsx</code></li></ul></li><li>If a component is shared / large and doesn’t have its own children: <code>parent/NewComponent.tsx</code><ul><li>e.g. <code>search/SearchPageHeader.tsx</code></li></ul></li><li>If the component has its own child components, put it in a new folder:<code>parent/NewComponent/NewComponent.tsx</code><ul><li>e.g. <code>search/SearchCard/SearchCard.tsx</code></li></ul></li></ul></li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="component-library">Component Library<a href="#component-library" class="hash-link" aria-label="Direct link to Component Library" title="Direct link to Component Library"></a></h3><ul><li>What is an DataHub component? (previously: alchemy component)<ul><li>Can be reused anywhere in the app</li><li>Generalized<ul><li>Doesn’t depend on our aspect / data structure</li><li>Doesn’t depend on graphql types</li></ul></li></ul></li><li>Where do reusable non-DataHub components go?<ul><li>e.g. <code>EntityHealth</code> icon, <code>HoverEntityTooltip</code><ul><li>Can be reused anywhere within the web app</li><li>Not general: can take in very DataHub/gms specific inputs, e.g. graphql types</li></ul></li><li>shared/<ul><li>components/<ul><li>entity/<ul><li><code>entity.types.ts</code></li><li>health/<ul><li><code>EntityHealth</code></li></ul></li><li>tooltip<ul><li><code>HoverEntityTooltip</code></li></ul></li></ul></li><li>button/<ul><li><code>DownloadSearchResultsButton</code></li></ul></li></ul></li><li>hooks/</li><li>utils/</li></ul></li></ul></li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="code-structure">Code Structure<a href="#code-structure" class="hash-link" aria-label="Direct link to Code Structure" title="Direct link to Code Structure"></a></h3><ul><li>When to break into a new component?<ul><li><em>We should err on the side of more and smaller components (files)</em></li><li>When JSX is getting too large or complex</li><li>Any logical or reusable chunk</li></ul><
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