[be] Add deadlinks script

[poteto]

While rewriting the compiler docs I happened to notice some deadlinks. This PR adds a new yarn deadlinks script to identify all deadlinks.

I decided to make this a script for now for simplicity but in the future could be ported to an ESlint rule.

The script handles:

• checks images correctly (images are stored in /public but links can omit the /public)
• looks up React error codes for dynamic error pages
• lints links to contributors and uses URL from acknowledgements page if the member is no longer active on the core team
• special injected anchor tags like #recap and #challenges

Example:

yarn run v1.22.22
$ node scripts/deadLinkChecker.js
Checking 177 markdown files...
Fetched 552 React error codes

src/content/learn/add-react-to-an-existing-project.md:23:58
  Link text: React-based frameworks
  URL: /learn/start-a-new-react-project
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/learn/add-react-to-an-existing-project.md:27:45
  Link text: benefit from the best practices
  URL: /learn/start-a-new-react-project#can-i-use-react-without-a-framework
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/learn/add-react-to-an-existing-project.md:152:269
  Link text: a React framework
  URL: /learn/start-a-new-react-project
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/learn/synchronizing-with-effects.md:735:18
  Link text: framework
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/learn/typescript.md:16:3
  Link text: Common types from `@types/react`
  URL: /learn/typescript/#useful-types
  ✗ Target file not found for: /learn/typescript/

src/content/learn/typescript.md:17:3
  Link text: Further learning locations
  URL: /learn/typescript/#further-learning
  ✗ Target file not found for: /learn/typescript/

src/content/learn/typescript.md:23:5
  Link text: production-grade React frameworks
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/learn/you-might-not-need-an-effect.md:29:399
  Link text: frameworks
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/learn/you-might-not-need-an-effect.md:754:106
  Link text: frameworks
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/learn/your-first-component.md:218:1
  Link text: React-based frameworks
  URL: /learn/start-a-new-react-project
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react/ViewTransition.md:146:248
  Link text: reveal content
  URL: /link-to-suspense-below
  ✗ Target file not found for: /link-to-suspense-below

src/content/reference/react/captureOwnerStack.md:60:94
  Link text: `errorInfo.componentStack` in `onUncaughtError`
  URL: /reference/react-dom/client/hydrateRoot#show-a-dialog-for-uncaught-errors
  ✗ Anchor #show-a-dialog-for-uncaught-errors not found in reference/react-dom/client/hydrateRoot.md

src/content/reference/react/forwardRef.md:9:65
  Link text: here
  URL: /blog/2024/04/25/react-19#ref-as-a-prop
  ✗ Target file not found for: /blog/2024/04/25/react-19

src/content/reference/react/use.md:315:24
  Link text: Server Component
  URL: /reference/react/components#server-components
  ✗ Anchor #server-components not found in reference/react/components.md

src/content/reference/react/useEffect.md:899:67
  Link text: if you use a framework,
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react/useEffect.md:1051:18
  Link text: framework
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react/useEffect.md:1736:92
  Link text: framework
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react/useInsertionEffect.md:136:65
  Link text: non-blocking update,
  URL: /reference/react/useTransition#marking-a-state-update-as-a-non-blocking-transition
  ✗ Anchor #marking-a-state-update-as-a-non-blocking-transition not found in reference/react/useTransition.md

src/content/reference/react-dom/createPortal.md:53:76
  Link text: key.
  URL: /learn/rendering-lists/#keeping-list-items-in-order-with-key
  ✗ Target file not found for: /learn/rendering-lists/

src/content/reference/react-dom/index.md:24:1
  Link text: React-based frameworks
  URL: /learn/start-a-new-react-project
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react-dom/index.md:51:3
  Link text: `unmountComponentAtNode`
  URL: /reference/react-dom/unmountComponentAtNode
  ✗ Target file not found for: /reference/react-dom/unmountComponentAtNode

src/content/reference/react-dom/preinit.md:7:1
  Link text: React-based frameworks
  URL: /learn/start-a-new-react-project
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react-dom/preinitModule.md:7:1
  Link text: React-based frameworks
  URL: /learn/start-a-new-react-project
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react-dom/preload.md:7:1
  Link text: React-based frameworks
  URL: /learn/start-a-new-react-project
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react-dom/preloadModule.md:7:1
  Link text: React-based frameworks
  URL: /learn/start-a-new-react-project
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/rsc/directives.md:13:36
  Link text: bundlers compatible with React Server Components
  URL: /learn/start-a-new-react-project#full-stack-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/rsc/server-components.md:7:34
  Link text: React Server Components
  URL: /learn/start-a-new-react-project#full-stack-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/rsc/server-functions.md:198:28
  Link text: `useActionState`
  URL: /reference/react-dom/hooks/useFormState
  ✗ Target file not found for: /reference/react-dom/hooks/useFormState

src/content/reference/rsc/server-functions.md:222:28
  Link text: `useActionState`
  URL: /reference/react-dom/hooks/useFormState
  ✗ Target file not found for: /reference/react-dom/hooks/useFormState

src/content/reference/rsc/use-client.md:44:77
  Link text: compatible bundlers
  URL: /learn/start-a-new-react-project#full-stack-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/rsc/use-server.md:98:54
  Link text: serializable props
  URL: /reference/rsc/use-client#passing-props-from-server-to-client-components
  ✗ Anchor #passing-props-from-server-to-client-components not found in reference/rsc/use-client.md

src/content/reference/react-dom/client/createRoot.md:212:278
  Link text: using a framework
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react-dom/client/index.md:7:185
  Link text: framework
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react-dom/components/common.md:919:89
  Link text: check out more examples.
  URL: /reference/react/useRef#examples-dom
  ✗ Anchor #examples-dom not found in reference/react/useRef.md

src/content/reference/react-dom/components/form.md:39:23
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/form.md:233:63
  Link text: reference documentation
  URL: /reference/react/hooks/useOptimistic
  ✗ Target file not found for: /reference/react/hooks/useOptimistic

src/content/reference/react-dom/components/input.md:33:24
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/link.md:33:23
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/meta.md:33:23
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/option.md:39:25
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/progress.md:33:27
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/script.md:34:25
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/select.md:39:25
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/style.md:33:24
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/textarea.md:33:27
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/components/title.md:33:24
  Link text: common element props.
  URL: /reference/react-dom/components/common#props
  ✗ Anchor #props not found in reference/react-dom/components/common.md

src/content/reference/react-dom/server/index.md:7:182
  Link text: framework
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/reference/react-dom/static/index.md:7:146
  Link text: framework
  URL: /learn/start-a-new-react-project#production-grade-react-frameworks
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/blog/2023/03/16/introducing-react-dev.md:45:5
  Link text: API Reference
  URL: /reference
  ✗ Target file not found for: /reference

src/content/blog/2023/03/16/introducing-react-dev.md:610:117
  Link text: Alternatives
  URL: /reference/react-dom/findDOMNode#alternatives
  ✗ Target file not found for: /reference/react-dom/findDOMNode

src/content/blog/2023/03/22/react-labs-what-we-have-been-working-on-march-2023.md:34:40
  Link text: Next.js App Router
  URL: /learn/start-a-new-react-project#nextjs-app-router
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/blog/2023/03/22/react-labs-what-we-have-been-working-on-march-2023.md:95:605
  Link text: Next.js App Router
  URL: /learn/start-a-new-react-project#nextjs-app-router
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/blog/2024/02/15/react-labs-what-we-have-been-working-on-february-2024.md:110:3
  Link text: Sathya Gunasekaran
  URL: /community/team#sathya-gunasekaran
  ✗ Contributor link should be updated to: https://github.com/gsathya

src/content/blog/2024/04/25/react-19-upgrade-guide.md:132:20
  Link text: improved how errors are handled
  URL: /blog/2024/04/25/react-19#error-handling
  ✗ Target file not found for: /blog/2024/04/25/react-19

src/content/blog/2024/04/25/react-19-upgrade-guide.md:502:19
  Link text: `ref` as a prop
  URL: /blog/2024/04/25/react-19#ref-as-a-prop
  ✗ Target file not found for: /blog/2024/04/25/react-19

src/content/blog/2024/12/05/react-19.md:358:391
  Link text: Full-stack React Architecture
  URL: /learn/start-a-new-react-project#which-features-make-up-the-react-teams-full-stack-architecture-vision
  ✗ Target file not found for: /learn/start-a-new-react-project

src/content/blog/2024/12/05/react-19.md:392:28
  Link text: React Server Actions
  URL: /reference/rsc/server-actions
  ✗ Target file not found for: /reference/rsc/server-actions

src/content/blog/2025/04/23/react-labs-view-transitions-activity-and-more.md:2498:37
  Link text: view transition classes
  URL: /reference/react/ViewTransition#view-transition-classes
  ✗ Anchor #view-transition-classes not found in reference/react/ViewTransition.md


Found 58 dead links out of 1555 total links

info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

---

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• [compiler] Rewrite React Compiler Docs #7868
• Fix deadlinks #7880
• -> [be] Add deadlinks script #7879

[github-actions]

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[jackpope]

Love it!