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react

React (UI ライブラリ本体, react / react-dom 19.3) の公式リファレンス。

Hooks (useState, useEffect, useActionState, useOptimistic, useEffectEvent), use, cache, Suspense, Activity, ViewTransition, createRoot, hydrateRoot, createPortal, flushSync, react-dom/server, Server Components / Server Functions, React Compiler, eslint-plugin-react-hooks, DevTools, Rules of React。

React Router・Next.js・TanStack 系・RHF とは別。

Fandhe-AI/agent-reference-skills
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含まれるファイル（176）

  • SKILL.md7.3 KB
  • references/apis/act.md2.1 KB
  • references/apis/addTransitionType.md2.4 KB
  • references/apis/cache.md3.0 KB
  • references/apis/cacheSignal.md1.8 KB
  • references/apis/captureOwnerStack.md2.5 KB
  • references/apis/createContext.md2.7 KB
  • references/apis/experimental_taintObjectReference.md2.5 KB
  • references/apis/experimental_taintUniqueValue.md3.1 KB
  • references/apis/lazy.md2.0 KB
  • references/apis/memo.md3.0 KB
  • references/apis/overview.md2.1 KB
  • references/apis/react-package.md2.8 KB
  • references/apis/README.md2.1 KB
  • references/apis/startTransition.md2.1 KB
  • references/apis/use.md3.9 KB
  • references/compiler/compilationMode.md2.7 KB
  • references/compiler/compiling-libraries.md1.9 KB
  • references/compiler/configuration.md2.3 KB
  • references/compiler/debugging.md2.7 KB
  • references/compiler/directives.md2.0 KB
  • references/compiler/gating.md1.9 KB
  • references/compiler/incremental-adoption.md3.9 KB
  • references/compiler/installation.md4.5 KB
  • references/compiler/introduction.md3.7 KB
  • references/compiler/logger.md1.8 KB
  • references/compiler/panicThreshold.md1.5 KB
  • references/compiler/README.md2.2 KB
  • references/compiler/target.md1.7 KB
  • references/compiler/use-memo.md1.7 KB
  • references/compiler/use-no-memo.md1.6 KB
  • references/components/Activity.md2.6 KB
  • references/components/Fragment.md5.0 KB
  • references/components/overview.md1.2 KB
  • references/components/Profiler.md2.4 KB
  • references/components/README.md1.0 KB
  • references/components/StrictMode.md2.0 KB
  • references/components/Suspense.md3.9 KB
  • references/components/ViewTransition.md6.2 KB
  • references/dom-apis/browser.md4.3 KB
  • references/dom-apis/client-overview.md1.3 KB
  • references/dom-apis/createPortal.md3.2 KB
  • references/dom-apis/createRoot.md4.5 KB
  • references/dom-apis/flushSync.md3.0 KB
  • references/dom-apis/hooks-overview.md1.1 KB
  • references/dom-apis/hydrateRoot.md5.1 KB
  • references/dom-apis/overview.md2.2 KB
  • references/dom-apis/preconnect.md1.8 KB
  • references/dom-apis/prefetchDNS.md2.0 KB
  • references/dom-apis/preinit.md3.2 KB
  • references/dom-apis/preinitModule.md2.3 KB
  • references/dom-apis/preload.md3.6 KB
  • references/dom-apis/preloadModule.md2.2 KB
  • references/dom-apis/README.md2.3 KB
  • references/dom-apis/useFormStatus.md3.0 KB
  • references/dom-components/common.md11.4 KB
  • references/dom-components/form.md4.2 KB
  • references/dom-components/img.md4.2 KB
  • references/dom-components/input.md8.1 KB
  • references/dom-components/link.md4.9 KB
  • references/dom-components/meta.md2.3 KB
  • references/dom-components/option.md1.1 KB
  • references/dom-components/overview.md2.7 KB
  • references/dom-components/progress.md1.1 KB
  • references/dom-components/README.md1.9 KB
  • references/dom-components/script.md4.3 KB
  • references/dom-components/select.md4.6 KB
  • references/dom-components/style.md3.8 KB
  • references/dom-components/textarea.md4.9 KB
  • references/dom-components/title.md2.2 KB
  • references/dom-server/prerender.md7.0 KB
  • references/dom-server/prerenderToNodeStream.md7.1 KB
  • references/dom-server/README.md1.9 KB
  • references/dom-server/renderToPipeableStream.md9.7 KB
  • references/dom-server/renderToReadableStream.md7.8 KB
  • references/dom-server/renderToStaticMarkup.md1.7 KB
  • references/dom-server/renderToString.md2.9 KB
  • references/dom-server/resume.md3.7 KB
  • references/dom-server/resumeAndPrerender.md3.7 KB
  • references/dom-server/resumeAndPrerenderToNodeStream.md3.8 KB
  • references/dom-server/resumeToPipeableStream.md4.3 KB
  • references/dom-server/server-overview.md1.9 KB
  • references/dom-server/static-overview.md1.4 KB
  • references/hooks/overview.md3.6 KB
  • references/hooks/README.md2.8 KB
  • references/hooks/useActionState.md4.7 KB
  • references/hooks/useCallback.md2.1 KB
  • references/hooks/useContext.md1.9 KB
  • references/hooks/useDebugValue.md1.3 KB
  • references/hooks/useDeferredValue.md2.2 KB
  • references/hooks/useEffect.md3.3 KB
  • references/hooks/useEffectEvent.md2.1 KB
  • references/hooks/useId.md1021 B
  • references/hooks/useImperativeHandle.md1.5 KB
  • references/hooks/useInsertionEffect.md1.8 KB
  • references/hooks/useLayoutEffect.md1.9 KB
  • references/hooks/useMemo.md2.1 KB
  • references/hooks/useOptimistic.md3.2 KB
  • references/hooks/useReducer.md2.7 KB
  • references/hooks/useRef.md2.2 KB
  • references/hooks/useState.md2.6 KB
  • references/hooks/useSyncExternalStore.md2.5 KB
  • references/hooks/useTransition.md3.1 KB
  • references/legacy/Children.md3.1 KB
  • references/legacy/cloneElement.md2.4 KB
  • references/legacy/Component.md7.3 KB
  • references/legacy/createElement.md2.6 KB
  • references/legacy/createRef.md2.0 KB
  • references/legacy/forwardRef.md2.3 KB
  • references/legacy/isValidElement.md1.3 KB
  • references/legacy/overview.md2.3 KB
  • references/legacy/PureComponent.md1.3 KB
  • references/legacy/README.md1.3 KB
  • references/rules-of-react/components-and-hooks-must-be-pure.md6.5 KB
  • references/rules-of-react/overview.md3.0 KB
  • references/rules-of-react/react-calls-components-and-hooks.md3.2 KB
  • references/rules-of-react/README.md973 B
  • references/rules-of-react/rules-of-hooks.md2.6 KB
  • references/server-components/directives.md980 B
  • references/server-components/README.md852 B
  • references/server-components/server-components.md6.0 KB
  • references/server-components/server-functions.md6.6 KB
  • references/server-components/use-client.md5.9 KB
  • references/server-components/use-server.md6.6 KB
  • references/tooling/eslint-plugin-react-hooks.md3.7 KB
  • references/tooling/lint-component-hook-factories.md1.6 KB
  • references/tooling/lint-config.md1.6 KB
  • references/tooling/lint-error-boundaries.md2.0 KB
  • references/tooling/lint-exhaustive-deps.md3.3 KB
  • references/tooling/lint-gating.md1.4 KB
  • references/tooling/lint-globals.md1.7 KB
  • references/tooling/lint-immutability.md1.7 KB
  • references/tooling/lint-incompatible-library.md3.7 KB
  • references/tooling/lint-preserve-manual-memoization.md2.0 KB
  • references/tooling/lint-purity.md1.7 KB
  • references/tooling/lint-refs.md2.6 KB
  • references/tooling/lint-rules-of-hooks.md3.3 KB
  • references/tooling/lint-set-state-in-effect.md2.1 KB
  • references/tooling/lint-set-state-in-render.md2.3 KB
  • references/tooling/lint-static-components.md1.9 KB
  • references/tooling/lint-unsupported-syntax.md1.9 KB
  • references/tooling/lint-use-memo.md1.6 KB
  • references/tooling/react-developer-tools.md1.8 KB
  • references/tooling/react-performance-tracks.md4.7 KB
  • references/tooling/README.md3.4 KB
  • references/tooling/typescript.md5.9 KB
  • references/versions/react-19-2.md3.7 KB
  • references/versions/react-19-3.md6.6 KB
  • references/versions/react-19-upgrade-guide.md6.7 KB
  • references/versions/react-19.md5.6 KB
  • references/versions/react-compiler-1.md3.7 KB
  • references/versions/README.md2.2 KB
  • references/versions/rsc-critical-security-vulnerability.md4.9 KB
  • references/versions/rsc-dos-and-source-code-exposure.md4.4 KB
  • references/versions/sunsetting-create-react-app.md3.4 KB
  • references/versions/versioning-policy.md3.0 KB
  • references/versions/versions.md3.4 KB
  • samples/custom-hooks.md1.6 KB
  • samples/form-actions.md2.4 KB
  • samples/optimistic-updates.md1.8 KB
  • samples/README.md2.2 KB
  • samples/reducer-and-context.md2.9 KB
  • samples/refs-and-dom.md809 B
  • samples/server-rendering-streaming.md1.8 KB
  • samples/state-and-events.md2.1 KB
  • samples/suspense-data-fetching.md2.4 KB
  • samples/synchronizing-with-effects.md1.4 KB
  • samples/thinking-in-react.md3.4 KB
  • samples/updating-objects-and-arrays.md2.5 KB
  • samples/view-transitions.md1.8 KB
  • samples/you-might-not-need-an-effect.md1.4 KB
  • scripts/compiler.md1.0 KB
  • scripts/create-app.md1.1 KB
  • scripts/devtools.md712 B
  • scripts/install.md819 B
  • scripts/README.md603 B

SKILL.md（原文）

インストールする前に、エージェントに与えられる指示の中身を確認できます。

React

対象バージョン: React 19.3.1 (npm react / react-dom latest、2026-10-14 公開。versions.md の表記は "Latest version: 19.3")。 関連パッケージ: babel-plugin-react-compiler 1.0.0 / eslint-plugin-react-hooks 7.1.1 / @types/react 19.3.0 / react-devtools 8.0.0。 ドキュメント出典: reactjs/react.dev（リリースタグなしのため main の commit 046f17d04295ba047bb5739026b4ac3110f17028（2026-10-06）に pin）。取得日 2026-10-16。

ディレクトリ構成

skills/react/
  SKILL.md
  references/
    hooks/                  # useState / useEffect / useActionState / useOptimistic ほか
      README.md
      overview.md
      useState.md
      useEffect.md
      useActionState.md
      useOptimistic.md
      ...
    apis/                   # react パッケージの組み込み API
      README.md
      overview.md
      react-package.md
      use.md
      cache.md
      memo.md
      startTransition.md
      ...
    components/             # 組み込みコンポーネント
      README.md
      Suspense.md
      Activity.md
      ViewTransition.md
      Fragment.md
      Profiler.md
      StrictMode.md
      overview.md
    dom-components/         # react-dom のコンポーネント (form / input / link / script ほか)
      README.md
      common.md
      form.md
      link.md
      ...
    dom-apis/               # react-dom の API・クライアント API・フォーム状態
      README.md
      createRoot.md
      hydrateRoot.md
      createPortal.md
      flushSync.md
      useFormStatus.md
      preload.md
      ...
    dom-server/             # react-dom/server・static
      README.md
      renderToPipeableStream.md
      renderToReadableStream.md
      prerender.md
      resume.md
      ...
    server-components/      # RSC・Server Functions・ディレクティブ
      README.md
      server-components.md
      server-functions.md
      use-client.md
      use-server.md
      directives.md
    rules-of-react/         # Rules of React
      README.md
      overview.md
      rules-of-hooks.md
      components-and-hooks-must-be-pure.md
      react-calls-components-and-hooks.md
    compiler/               # React Compiler
      README.md
      introduction.md
      installation.md
      configuration.md
      compilationMode.md
      incremental-adoption.md
      debugging.md
      ...
    tooling/                # ESLint プラグイン・DevTools・TypeScript・Performance tracks
      README.md
      eslint-plugin-react-hooks.md
      lint-exhaustive-deps.md
      lint-rules-of-hooks.md
      react-developer-tools.md
      typescript.md
      react-performance-tracks.md
      ...
    legacy/                 # レガシー API
      README.md
      overview.md
      Component.md
      forwardRef.md
      createElement.md
      ...
    versions/               # リリースノート・アップグレード・脆弱性告知
      README.md
      versions.md
      versioning-policy.md
      react-19.md
      react-19-2.md
      react-19-3.md
      react-19-upgrade-guide.md
      react-compiler-1.md
      ...
  samples/
    README.md
    thinking-in-react.md
    state-and-events.md
    form-actions.md
    optimistic-updates.md
    suspense-data-fetching.md
    view-transitions.md
    server-rendering-streaming.md
    ...
  scripts/
    README.md
    install.md
    create-app.md
    compiler.md
    devtools.md

探索手順

タスクからカテゴリを引き、カテゴリの README.md で目的のページを特定する:

  1. 下記マッピング表でタスクに対応するカテゴリを探す
  2. そのカテゴリの references/{category}/README.md を参照して目的のページを特定する
  3. 該当ページの .md を Read して詳細を確認する

タスク → カテゴリ マッピング

タスクカテゴリ参照 README
state・ref・effect・context・transition などの Hook を使うhooksreferences/hooks/README.md
フォーム Action・楽観的更新・Effect Event の API を調べるhooksreferences/hooks/README.md
use / cache / memo / lazy / startTransition / createContext を調べるapisreferences/apis/README.md
act・captureOwnerStack・addTransitionType・taint API を調べるapisreferences/apis/README.md
Suspense / Activity / ViewTransition / StrictMode / Profiler / Fragment を使うcomponentsreferences/components/README.md
<form> / <input> / <select> / <link> / <script> / <title> などの DOM コンポーネントを調べるdom-componentsreferences/dom-components/README.md
createRoot / hydrateRoot / createPortal / flushSync を使うdom-apisreferences/dom-apis/README.md
preload / preinit / preconnect などのリソースプリロード、useFormStatus を調べるdom-apisreferences/dom-apis/README.md
サーバーレンダリング・ストリーミング・prerender・resume を調べるdom-serverreferences/dom-server/README.md
Server Components・Server Functions・'use client' / 'use server' を調べるserver-componentsreferences/server-components/README.md
Hooks のルール・純粋性など Rules of React を確認するrules-of-reactreferences/rules-of-react/README.md
React Compiler の導入・設定・段階的導入・デバッグcompilerreferences/compiler/README.md
"use memo" / "use no memo" / compilationMode / gating を調べるcompilerreferences/compiler/README.md
eslint-plugin-react-hooks のルール・設定を調べるtoolingreferences/tooling/README.md
React DevTools・TypeScript 型・Performance tracks を使うtoolingreferences/tooling/README.md
クラスコンポーネント・forwardRef・createElement などレガシー API を調べるlegacyreferences/legacy/README.md
19.x のリリースノート・アップグレード手順・脆弱性告知を確認するversionsreferences/versions/README.md
典型的な使い方を知りたいsamplessamples/README.md
インストール・アプリ作成・Compiler 導入コマンドを知りたいscriptsscripts/README.md

レビュー

まだレビューはありません。使ってみた感想をお寄せください。

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