diff --git a/.eslintrc b/.eslintrc index f617dea26..f8b03f98a 100644 --- a/.eslintrc +++ b/.eslintrc @@ -2,11 +2,13 @@ "root": true, "extends": "next/core-web-vitals", "parser": "@typescript-eslint/parser", - "plugins": ["@typescript-eslint"], + "plugins": ["@typescript-eslint", "eslint-plugin-react-compiler"], "rules": { "no-unused-vars": "off", - "@typescript-eslint/no-unused-vars": ["error", { "varsIgnorePattern": "^_" }], - "react-hooks/exhaustive-deps": "error" + "@typescript-eslint/no-unused-vars": ["error", {"varsIgnorePattern": "^_"}], + "react-hooks/exhaustive-deps": "error", + "react/no-unknown-property": ["error", {"ignore": ["meta"]}], + "react-compiler/react-compiler": "error" }, "env": { "node": true, diff --git a/.github/workflows/discord_notify.yml b/.github/workflows/discord_notify.yml new file mode 100644 index 000000000..a4b8c9137 --- /dev/null +++ b/.github/workflows/discord_notify.yml @@ -0,0 +1,28 @@ +name: Discord Notify + +on: + pull_request_target: + types: [opened, ready_for_review] + +jobs: + check_maintainer: + uses: facebook/react/.github/workflows/shared_check_maintainer.yml@main + with: + actor: ${{ github.event.pull_request.user.login }} + is_remote: true + + notify: + if: ${{ needs.check_maintainer.outputs.is_core_team == 'true' }} + needs: check_maintainer + runs-on: ubuntu-latest + steps: + - name: Discord Webhook Action + uses: tsickert/discord-webhook@v6.0.0 + with: + webhook-url: ${{ secrets.DISCORD_WEBHOOK_URL }} + embed-author-name: ${{ github.event.pull_request.user.login }} + embed-author-url: ${{ github.event.pull_request.user.html_url }} + embed-author-icon-url: ${{ github.event.pull_request.user.avatar_url }} + embed-title: '#${{ github.event.number }} (+${{github.event.pull_request.additions}} -${{github.event.pull_request.deletions}}): ${{ github.event.pull_request.title }}' + embed-description: ${{ github.event.pull_request.body }} + embed-url: ${{ github.event.pull_request.html_url }} diff --git a/.github/workflows/label_core_team_prs.yml b/.github/workflows/label_core_team_prs.yml new file mode 100644 index 000000000..3d9fa2be1 --- /dev/null +++ b/.github/workflows/label_core_team_prs.yml @@ -0,0 +1,32 @@ +name: Label Core Team PRs + +on: + pull_request_target: + +env: + TZ: /usr/share/zoneinfo/America/Los_Angeles + # https://github.com/actions/cache/blob/main/tips-and-workarounds.md#cache-segment-restore-timeout + SEGMENT_DOWNLOAD_TIMEOUT_MINS: 1 + +jobs: + check_maintainer: + uses: facebook/react/.github/workflows/shared_check_maintainer.yml@main + with: + actor: ${{ github.event.pull_request.user.login }} + is_remote: true + + label: + if: ${{ needs.check_maintainer.outputs.is_core_team == 'true' }} + runs-on: ubuntu-latest + needs: check_maintainer + steps: + - name: Label PR as React Core Team + uses: actions/github-script@v7 + with: + script: | + github.rest.issues.addLabels({ + owner: context.repo.owner, + repo: context.repo.repo, + issue_number: ${{ github.event.number }}, + labels: ['React Core Team'] + }); diff --git a/next-env.d.ts b/next-env.d.ts index 4f11a03dc..3cd7048ed 100644 --- a/next-env.d.ts +++ b/next-env.d.ts @@ -1,5 +1,6 @@ /// /// +/// // NOTE: This file should not be edited -// see https://nextjs.org/docs/basic-features/typescript for more information. +// see https://nextjs.org/docs/app/api-reference/config/typescript for more information. diff --git a/next.config.js b/next.config.js index 61ff1944a..861792c8e 100644 --- a/next.config.js +++ b/next.config.js @@ -9,10 +9,8 @@ const nextConfig = { pageExtensions: ['jsx', 'js', 'ts', 'tsx', 'mdx', 'md'], reactStrictMode: true, experimental: { - // TODO: Remove after https://github.com/vercel/next.js/issues/49355 is fixed - appDir: false, scrollRestoration: true, - legacyBrowsers: false, + reactCompiler: true, }, env: {}, webpack: (config, {dev, isServer, ...options}) => { diff --git a/package.json b/package.json index 327e9ba67..e782ce169 100644 --- a/package.json +++ b/package.json @@ -18,7 +18,7 @@ "ci-check": "npm-run-all prettier:diff --parallel lint tsc lint-heading-ids rss", "tsc": "tsc --noEmit", "start": "next start", - "postinstall": "patch-package && (is-ci || husky install .husky)", + "postinstall": "is-ci || husky install .husky", "check-all": "npm-run-all prettier lint:fix tsc rss", "rss": "node scripts/generateRss.js", "textlint": "cd textlint && yarn --frozen-lockfile && yarn textlint", @@ -26,8 +26,8 @@ }, "dependencies": { "@codesandbox/sandpack-react": "2.13.5", - "@docsearch/css": "^3.6.1", - "@docsearch/react": "^3.6.1", + "@docsearch/css": "^3.8.3", + "@docsearch/react": "^3.8.3", "@headlessui/react": "^1.7.0", "@radix-ui/react-context-menu": "^2.1.5", "body-scroll-lock": "^3.1.3", @@ -35,12 +35,12 @@ "date-fns": "^2.16.1", "debounce": "^1.2.1", "github-slugger": "^1.3.0", - "next": "^13.4.1", + "next": "15.1.0", "next-remote-watch": "^1.0.0", "parse-numeric-range": "^1.2.0", - "react": "^0.0.0-experimental-16d053d59-20230506", + "react": "^19.0.0", "react-collapsed": "4.0.4", - "react-dom": "^0.0.0-experimental-16d053d59-20230506", + "react-dom": "^19.0.0", "remark-frontmatter": "^4.0.1", "remark-gfm": "^3.0.1" }, @@ -56,13 +56,14 @@ "@types/mdx-js__react": "^1.5.2", "@types/node": "^14.6.4", "@types/parse-numeric-range": "^0.0.1", - "@types/react": "^18.0.9", - "@types/react-dom": "^18.0.5", + "@types/react": "^19.0.0", + "@types/react-dom": "^19.0.0", "@typescript-eslint/eslint-plugin": "^5.36.2", "@typescript-eslint/parser": "^5.36.2", "asyncro": "^3.0.0", "autoprefixer": "^10.4.2", "babel-eslint": "10.x", + "babel-plugin-react-compiler": "19.0.0-beta-e552027-20250112", "eslint": "7.x", "eslint-config-next": "12.0.3", "eslint-config-react-app": "^5.2.1", @@ -70,6 +71,7 @@ "eslint-plugin-import": "2.x", "eslint-plugin-jsx-a11y": "6.x", "eslint-plugin-react": "7.x", + "eslint-plugin-react-compiler": "^19.0.0-beta-e552027-20250112", "eslint-plugin-react-hooks": "^0.0.0-experimental-fabef7a6b-20221215", "fs-extra": "^9.0.1", "globby": "^11.0.1", @@ -80,7 +82,6 @@ "mdast-util-to-string": "^1.1.0", "metro-cache": "0.72.2", "npm-run-all": "^4.1.5", - "patch-package": "^6.2.2", "postcss": "^8.4.5", "postcss-flexbugs-fixes": "4.2.1", "postcss-preset-env": "^6.7.0", @@ -96,7 +97,7 @@ "retext-smartypants": "^4.0.0", "rss": "^1.2.2", "tailwindcss": "^3.4.1", - "typescript": "^4.0.2", + "typescript": "^5.7.2", "unist-util-visit": "^2.0.3", "webpack-bundle-analyzer": "^4.5.0" }, @@ -110,6 +111,12 @@ }, "lint-staged": { "*.{js,ts,jsx,tsx,css}": "yarn prettier", +<<<<<<< HEAD "src/**/*.md": ["yarn fix-headings", "yarn textlint-staged --"] } +======= + "src/**/*.md": "yarn fix-headings" + }, + "packageManager": "yarn@1.22.22" +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 } diff --git a/patches/next+13.4.1.patch b/patches/next+13.4.1.patch deleted file mode 100644 index 6de490aa4..000000000 --- a/patches/next+13.4.1.patch +++ /dev/null @@ -1,22 +0,0 @@ -diff --git a/node_modules/next/dist/server/render.js b/node_modules/next/dist/server/render.js -index a1f8648..1b3d608 100644 ---- a/node_modules/next/dist/server/render.js -+++ b/node_modules/next/dist/server/render.js -@@ -758,9 +758,14 @@ async function renderToHTML(req, res, pathname, query, renderOpts) { - // Always using react concurrent rendering mode with required react version 18.x - const renderShell = async (EnhancedApp, EnhancedComponent)=>{ - const content = renderContent(EnhancedApp, EnhancedComponent); -- return await (0, _nodewebstreamshelper.renderToInitialStream)({ -- ReactDOMServer: _serverbrowser.default, -- element: content -+ return new Promise((resolve, reject) => { -+ (0, _nodewebstreamshelper.renderToInitialStream)({ -+ ReactDOMServer: _serverbrowser.default, -+ element: content, -+ streamOptions: { -+ onError: reject -+ } -+ }).then(resolve, reject); - }); - }; - const createBodyResult = (0, _tracer.getTracer)().wrap(_constants2.RenderSpan.createBodyResult, (initialStream, suffix)=>{ diff --git a/patches/next-remote-watch+1.0.0.patch b/patches/next-remote-watch+1.0.0.patch deleted file mode 100644 index c9ecef84d..000000000 --- a/patches/next-remote-watch+1.0.0.patch +++ /dev/null @@ -1,16 +0,0 @@ -diff --git a/node_modules/next-remote-watch/bin/next-remote-watch b/node_modules/next-remote-watch/bin/next-remote-watch -index c055b66..a2f749c 100755 ---- a/node_modules/next-remote-watch/bin/next-remote-watch -+++ b/node_modules/next-remote-watch/bin/next-remote-watch -@@ -66,7 +66,10 @@ app.prepare().then(() => { - } - } - -- app.server.hotReloader.send('reloadPage') -+ app.server.hotReloader.send({ -+ event: 'serverOnlyChanges', -+ pages: ['/[[...markdownPath]]'] -+ }); - } - ) - } diff --git a/public/images/team/andrey-lunyov.jpg b/public/images/team/andrey-lunyov.jpg deleted file mode 100644 index aeaaec06a..000000000 Binary files a/public/images/team/andrey-lunyov.jpg and /dev/null differ diff --git a/public/images/team/hendrik.jpg b/public/images/team/hendrik.jpg new file mode 100644 index 000000000..b39ea5be2 Binary files /dev/null and b/public/images/team/hendrik.jpg differ diff --git a/public/images/team/jordan.jpg b/public/images/team/jordan.jpg new file mode 100644 index 000000000..d8874a29f Binary files /dev/null and b/public/images/team/jordan.jpg differ diff --git a/public/images/team/kathryn-middleton.jpg b/public/images/team/kathryn-middleton.jpg deleted file mode 100644 index 904c3b134..000000000 Binary files a/public/images/team/kathryn-middleton.jpg and /dev/null differ diff --git a/public/images/team/lauren.jpg b/public/images/team/lauren.jpg index 26d46bd2f..a8615aa00 100644 Binary files a/public/images/team/lauren.jpg and b/public/images/team/lauren.jpg differ diff --git a/public/images/team/luna-wei.jpg b/public/images/team/luna-wei.jpg deleted file mode 100644 index cdc4a2b6a..000000000 Binary files a/public/images/team/luna-wei.jpg and /dev/null differ diff --git a/public/images/team/mike.jpg b/public/images/team/mike.jpg new file mode 100644 index 000000000..39fe23fea Binary files /dev/null and b/public/images/team/mike.jpg differ diff --git a/public/images/team/noahlemen.jpg b/public/images/team/noahlemen.jpg deleted file mode 100644 index e3f788d89..000000000 Binary files a/public/images/team/noahlemen.jpg and /dev/null differ diff --git a/public/images/team/pieter.jpg b/public/images/team/pieter.jpg new file mode 100644 index 000000000..d098e5abe Binary files /dev/null and b/public/images/team/pieter.jpg differ diff --git a/public/images/team/sam.jpg b/public/images/team/sam.jpg deleted file mode 100644 index f73474b91..000000000 Binary files a/public/images/team/sam.jpg and /dev/null differ diff --git a/public/images/team/sathya.jpg b/public/images/team/sathya.jpg deleted file mode 100644 index 0f087f4a3..000000000 Binary files a/public/images/team/sathya.jpg and /dev/null differ diff --git a/public/images/team/tianyu.jpg b/public/images/team/tianyu.jpg deleted file mode 100644 index aeb6ed9fa..000000000 Binary files a/public/images/team/tianyu.jpg and /dev/null differ diff --git a/src/components/ExternalLink.tsx b/src/components/ExternalLink.tsx index 38b1f2c5f..13fe6d3a9 100644 --- a/src/components/ExternalLink.tsx +++ b/src/components/ExternalLink.tsx @@ -1,13 +1,17 @@ /* * Copyright (c) Facebook, Inc. and its affiliates. */ +import type {DetailedHTMLProps, AnchorHTMLAttributes} from 'react'; export function ExternalLink({ href, target, children, ...props -}: JSX.IntrinsicElements['a']) { +}: DetailedHTMLProps< + AnchorHTMLAttributes, + HTMLAnchorElement +>) { return ( {children} diff --git a/src/components/Icon/IconArrow.tsx b/src/components/Icon/IconArrow.tsx index 714cccd82..61e4e52cd 100644 --- a/src/components/Icon/IconArrow.tsx +++ b/src/components/Icon/IconArrow.tsx @@ -4,9 +4,10 @@ import {memo} from 'react'; import cn from 'classnames'; +import type {SVGProps} from 'react'; export const IconArrow = memo< - JSX.IntrinsicElements['svg'] & { + SVGProps & { /** * The direction the arrow should point. * `start` and `end` are relative to the current locale. diff --git a/src/components/Icon/IconArrowSmall.tsx b/src/components/Icon/IconArrowSmall.tsx index 6653dc387..4a3d3ad02 100644 --- a/src/components/Icon/IconArrowSmall.tsx +++ b/src/components/Icon/IconArrowSmall.tsx @@ -4,9 +4,10 @@ import {memo} from 'react'; import cn from 'classnames'; +import type {SVGProps} from 'react'; export const IconArrowSmall = memo< - JSX.IntrinsicElements['svg'] & { + SVGProps & { /** * The direction the arrow should point. * `start` and `end` are relative to the current locale. diff --git a/src/components/Icon/IconBsky.tsx b/src/components/Icon/IconBsky.tsx index 6645152dd..5d461556f 100644 --- a/src/components/Icon/IconBsky.tsx +++ b/src/components/Icon/IconBsky.tsx @@ -3,10 +3,9 @@ */ import {memo} from 'react'; +import type {SVGProps} from 'react'; -export const IconBsky = memo(function IconBsky( - props -) { +export const IconBsky = memo>(function IconBsky(props) { return ( (function IconClose( +export const IconClose = memo>(function IconClose( props ) { return ( diff --git a/src/components/Icon/IconFacebookCircle.tsx b/src/components/Icon/IconFacebookCircle.tsx index 0900d6815..7f1080afa 100644 --- a/src/components/Icon/IconFacebookCircle.tsx +++ b/src/components/Icon/IconFacebookCircle.tsx @@ -3,8 +3,9 @@ */ import {memo} from 'react'; +import type {SVGProps} from 'react'; -export const IconFacebookCircle = memo( +export const IconFacebookCircle = memo>( function IconFacebookCircle(props) { return ( ( - function IconGitHub(props) { - return ( - - - - ); - } -); +export const IconGitHub = memo>(function IconGitHub( + props +) { + return ( + + + + ); +}); diff --git a/src/components/Icon/IconHamburger.tsx b/src/components/Icon/IconHamburger.tsx index 5e6aa725a..8bc90ee0c 100644 --- a/src/components/Icon/IconHamburger.tsx +++ b/src/components/Icon/IconHamburger.tsx @@ -3,8 +3,9 @@ */ import {memo} from 'react'; +import type {SVGProps} from 'react'; -export const IconHamburger = memo( +export const IconHamburger = memo>( function IconHamburger(props) { return ( ( +export const IconInstagram = memo>( function IconInstagram(props) { return ( (function IconLink( - props -) { +export const IconLink = memo>(function IconLink(props) { return ( ( - function IconNewPage(props) { - return ( - - - - - ); - } -); +export const IconNewPage = memo>(function IconNewPage( + props +) { + return ( + + + + + ); +}); diff --git a/src/components/Icon/IconRss.tsx b/src/components/Icon/IconRss.tsx index f2a52ee25..6208236f4 100644 --- a/src/components/Icon/IconRss.tsx +++ b/src/components/Icon/IconRss.tsx @@ -3,10 +3,9 @@ */ import {memo} from 'react'; +import type {SVGProps} from 'react'; -export const IconRss = memo(function IconRss( - props -) { +export const IconRss = memo>(function IconRss(props) { return ( ( - function IconSearch(props) { - return ( - - - - ); - } -); +export const IconSearch = memo>(function IconSearch( + props +) { + return ( + + + + ); +}); diff --git a/src/components/Icon/IconThreads.tsx b/src/components/Icon/IconThreads.tsx index 5a007657f..9ea0bafdf 100644 --- a/src/components/Icon/IconThreads.tsx +++ b/src/components/Icon/IconThreads.tsx @@ -3,22 +3,23 @@ */ import {memo} from 'react'; +import type {SVGProps} from 'react'; -export const IconThreads = memo( - function IconThreads(props) { - return ( - - - - ); - } -); +export const IconThreads = memo>(function IconThreads( + props +) { + return ( + + + + ); +}); diff --git a/src/components/Icon/IconTwitter.tsx b/src/components/Icon/IconTwitter.tsx index e7b0cf09e..e84971f4e 100644 --- a/src/components/Icon/IconTwitter.tsx +++ b/src/components/Icon/IconTwitter.tsx @@ -3,20 +3,21 @@ */ import {memo} from 'react'; +import type {SVGProps} from 'react'; -export const IconTwitter = memo( - function IconTwitter(props) { - return ( - - - - - ); - } -); +export const IconTwitter = memo>(function IconTwitter( + props +) { + return ( + + + + + ); +}); diff --git a/src/components/Layout/Sidebar/SidebarRouteTree.tsx b/src/components/Layout/Sidebar/SidebarRouteTree.tsx index 54f02b925..72003df74 100644 --- a/src/components/Layout/Sidebar/SidebarRouteTree.tsx +++ b/src/components/Layout/Sidebar/SidebarRouteTree.tsx @@ -38,6 +38,7 @@ function CollapseWrapper({ // Disable pointer events while animating. const isExpandedRef = useRef(isExpanded); if (typeof window !== 'undefined') { + // eslint-disable-next-line react-compiler/react-compiler // eslint-disable-next-line react-hooks/rules-of-hooks useLayoutEffect(() => { const wasExpanded = isExpandedRef.current; diff --git a/src/components/Logo.tsx b/src/components/Logo.tsx index 07e72c992..8c4f7da4f 100644 --- a/src/components/Logo.tsx +++ b/src/components/Logo.tsx @@ -1,8 +1,9 @@ /* * Copyright (c) Facebook, Inc. and its affiliates. */ +import type {SVGProps} from 'react'; -export function Logo(props: JSX.IntrinsicElements['svg']) { +export function Logo(props: SVGProps) { return ( = {}; let content: React.ReactElement[] = []; Children.forEach(children, (child) => { - const {props, type} = child; + const {props, type} = child as React.ReactElement<{ + children?: string; + id?: string; + }>; switch ((type as any).mdxName) { case 'Solution': { challenge.solution = child; diff --git a/src/components/MDX/CodeBlock/CodeBlock.tsx b/src/components/MDX/CodeBlock/CodeBlock.tsx index 7eef0abe8..42165c57d 100644 --- a/src/components/MDX/CodeBlock/CodeBlock.tsx +++ b/src/components/MDX/CodeBlock/CodeBlock.tsx @@ -289,7 +289,7 @@ function getSyntaxHighlight(theme: any): HighlightStyle { function getLineDecorators( code: string, - meta: string + meta?: string ): Array<{ line: number; className: string; @@ -309,7 +309,7 @@ function getLineDecorators( function getInlineDecorators( code: string, - meta: string + meta?: string ): Array<{ step: number; line: number; @@ -336,6 +336,7 @@ function getInlineDecorators( line.step === 3, 'bg-green-40 border-green-40 text-green-60 dark:text-green-30': line.step === 4, + // TODO: Some codeblocks use up to 6 steps. } ), }) diff --git a/src/components/MDX/CodeDiagram.tsx b/src/components/MDX/CodeDiagram.tsx index 7a503f068..2a198fc56 100644 --- a/src/components/MDX/CodeDiagram.tsx +++ b/src/components/MDX/CodeDiagram.tsx @@ -17,7 +17,14 @@ export function CodeDiagram({children, flip = false}: CodeDiagramProps) { }); const content = Children.toArray(children).map((child: any) => { if (child.type?.mdxName === 'pre') { - return ; + return ( + + ); } else if (child.type === 'img') { return null; } else { diff --git a/src/components/MDX/ConsoleBlock.tsx b/src/components/MDX/ConsoleBlock.tsx index 6e704b417..6044b1370 100644 --- a/src/components/MDX/ConsoleBlock.tsx +++ b/src/components/MDX/ConsoleBlock.tsx @@ -38,7 +38,8 @@ export function ConsoleBlock({level = 'error', children}: ConsoleBlockProps) { if (typeof children === 'string') { message = children; } else if (isValidElement(children)) { - message = children.props.children; + message = (children as React.ReactElement<{children?: React.ReactNode}>) + .props.children; } return ( @@ -113,7 +114,8 @@ export function ConsoleLogLine({children, level}: ConsoleBlockProps) { if (typeof children === 'string') { message = children; } else if (isValidElement(children)) { - message = children.props.children; + message = (children as React.ReactElement<{children?: React.ReactNode}>) + .props.children; } else if (Array.isArray(children)) { message = children.reduce((result, child) => { if (typeof child === 'string') { diff --git a/src/components/MDX/ErrorDecoder.tsx b/src/components/MDX/ErrorDecoder.tsx index 198aa939d..b04fa9f79 100644 --- a/src/components/MDX/ErrorDecoder.tsx +++ b/src/components/MDX/ErrorDecoder.tsx @@ -11,7 +11,7 @@ function replaceArgs( return msg.replace(/%s/g, function () { const arg = argList[argIdx++]; // arg can be an empty string: ?args[0]=&args[1]=count - return arg === undefined || arg === '' ? replacer : arg; + return arg === undefined ? replacer : arg; }); } diff --git a/src/components/MDX/InlineCode.tsx b/src/components/MDX/InlineCode.tsx index 0e8db0165..5759a7c0a 100644 --- a/src/components/MDX/InlineCode.tsx +++ b/src/components/MDX/InlineCode.tsx @@ -3,6 +3,7 @@ */ import cn from 'classnames'; +import type {HTMLAttributes} from 'react'; interface InlineCodeProps { isLink?: boolean; @@ -11,7 +12,7 @@ interface InlineCodeProps { function InlineCode({ isLink, ...props -}: JSX.IntrinsicElements['code'] & InlineCodeProps) { +}: HTMLAttributes & InlineCodeProps) { return ( in case of RTL languages to avoid like `()console.log` to be rendered as `console.log()` diff --git a/src/components/MDX/MDXComponents.tsx b/src/components/MDX/MDXComponents.tsx index d00b9b33e..fffa4637a 100644 --- a/src/components/MDX/MDXComponents.tsx +++ b/src/components/MDX/MDXComponents.tsx @@ -5,6 +5,7 @@ import {Children, useContext, useMemo} from 'react'; import * as React from 'react'; import cn from 'classnames'; +import type {HTMLAttributes} from 'react'; import CodeBlock from './CodeBlock'; import {CodeDiagram} from './CodeDiagram'; @@ -59,21 +60,21 @@ function CodeStep({children, step}: {children: any; step: number}) { ); } -const P = (p: JSX.IntrinsicElements['p']) => ( +const P = (p: HTMLAttributes) => (

); -const Strong = (strong: JSX.IntrinsicElements['strong']) => ( +const Strong = (strong: HTMLAttributes) => ( ); -const OL = (p: JSX.IntrinsicElements['ol']) => ( +const OL = (p: HTMLAttributes) => (

    ); -const LI = (p: JSX.IntrinsicElements['li']) => ( +const LI = (p: HTMLAttributes) => (
  1. ); -const UL = (p: JSX.IntrinsicElements['ul']) => ( +const UL = (p: HTMLAttributes) => (
      ); @@ -139,10 +140,7 @@ const RSCBadge = ({title}: {title: string}) => ( ); -const Blockquote = ({ - children, - ...props -}: JSX.IntrinsicElements['blockquote']) => { +const Blockquote = ({children, ...props}: HTMLAttributes) => { return (
      ({}); if (!lineCountRef.current[activeFile]) { + // eslint-disable-next-line react-compiler/react-compiler lineCountRef.current[activeFile] = code.split('\n').length; } const lineCount = lineCountRef.current[activeFile]; diff --git a/src/components/MDX/Sandpack/LoadingOverlay.tsx b/src/components/MDX/Sandpack/LoadingOverlay.tsx index cd3f38fca..de883629c 100644 --- a/src/components/MDX/Sandpack/LoadingOverlay.tsx +++ b/src/components/MDX/Sandpack/LoadingOverlay.tsx @@ -17,7 +17,7 @@ export const LoadingOverlay = ({ clientId: string; dependenciesLoading: boolean; forceLoading: boolean; -} & React.HTMLAttributes): JSX.Element | null => { +} & React.HTMLAttributes): React.ReactNode | null => { const loadingOverlayState = useLoadingOverlayState( clientId, dependenciesLoading, @@ -64,6 +64,7 @@ export const LoadingOverlay = ({ transition: `opacity ${FADE_ANIMATION_DURATION}ms ease-out`, }}>
      + {/* @ts-ignore: the OpenInCodeSandboxButton type from '@codesandbox/sandpack-react/unstyled' is incompatible with JSX in React 19 */}
      diff --git a/src/components/MDX/Sandpack/NavigationBar.tsx b/src/components/MDX/Sandpack/NavigationBar.tsx index 26ed5783d..bf2c3186c 100644 --- a/src/components/MDX/Sandpack/NavigationBar.tsx +++ b/src/components/MDX/Sandpack/NavigationBar.tsx @@ -115,7 +115,10 @@ export function NavigationBar({providedFiles}: {providedFiles: Array}) { return (
      + {/* If Prettier reformats this block, the two @ts-ignore directives will no longer be adjacent to the problematic lines, causing TypeScript errors */} + {/* prettier-ignore */}
      + {/* @ts-ignore: the Listbox type from '@headlessui/react' is incompatible with JSX in React 19 */}
      @@ -129,8 +132,10 @@ export function NavigationBar({providedFiles}: {providedFiles: Array}) { 'w-[fit-content]', showDropdown ? 'invisible' : '' )}> + {/* @ts-ignore: the FileTabs type from '@codesandbox/sandpack-react/unstyled' is incompatible with JSX in React 19 */}
      + {/* @ts-ignore: the Listbox type from '@headlessui/react' is incompatible with JSX in React 19 */} {({open}) => ( // If tabs don't fit, display the dropdown instead. @@ -160,10 +165,10 @@ export function NavigationBar({providedFiles}: {providedFiles: Array}) {
      - {isMultiFile && showDropdown && ( - - {visibleFiles.map((filePath: string) => ( - + {/* @ts-ignore: the Listbox type from '@headlessui/react' is incompatible with JSX in React 19 */} + {isMultiFile && showDropdown && ( + {/* @ts-ignore: the Listbox type from '@headlessui/react' is incompatible with JSX in React 19 */} + {visibleFiles.map((filePath: string) => ( {({active}) => (
    • { ) { return result; } - const {props} = codeSnippet.props.children; + const {props} = ( + codeSnippet.props as PropsWithChildren<{ + children: ReactElement< + HTMLAttributes & {meta?: string} + >; + }> + ).children; let filePath; // path in the folder structure let fileHidden = false; // if the file is available as a tab let fileActive = false; // if the file tab is shown by default diff --git a/src/components/MDX/TeamMember.tsx b/src/components/MDX/TeamMember.tsx index e1b9198d8..2c2fffa73 100644 --- a/src/components/MDX/TeamMember.tsx +++ b/src/components/MDX/TeamMember.tsx @@ -3,7 +3,7 @@ */ import * as React from 'react'; -import Image from 'next/image'; +import Image from 'next/legacy/image'; import {IconTwitter} from '../Icon/IconTwitter'; import {IconThreads} from '../Icon/IconThreads'; import {IconBsky} from '../Icon/IconBsky'; @@ -39,11 +39,9 @@ export function TeamMember({ personal, }: TeamMemberProps) { if (name == null || title == null || permalink == null || children == null) { + const identifier = name ?? title ?? permalink ?? 'unknown'; throw new Error( - 'Expected name, title, permalink, and children for ' + name ?? - title ?? - permalink ?? - 'unknown' + `Expected name, title, permalink, and children for ${identifier}` ); } return ( diff --git a/src/components/MDX/TerminalBlock.tsx b/src/components/MDX/TerminalBlock.tsx index fc13af338..475292716 100644 --- a/src/components/MDX/TerminalBlock.tsx +++ b/src/components/MDX/TerminalBlock.tsx @@ -31,9 +31,11 @@ function TerminalBlock({level = 'info', children}: TerminalBlockProps) { message = children; } else if ( isValidElement(children) && - typeof children.props.children === 'string' + typeof (children as React.ReactElement<{children: string}>).props + .children === 'string' ) { - message = children.props.children; + message = (children as React.ReactElement<{children: string}>).props + .children; } else { throw Error('Expected TerminalBlock children to be a plain string.'); } @@ -71,7 +73,7 @@ function TerminalBlock({level = 'info', children}: TerminalBlockProps) {
    • diff --git a/src/components/Search.tsx b/src/components/Search.tsx index f5c963f67..c7401487b 100644 --- a/src/components/Search.tsx +++ b/src/components/Search.tsx @@ -9,6 +9,8 @@ import {lazy, useEffect} from 'react'; import * as React from 'react'; import {createPortal} from 'react-dom'; import {siteConfig} from 'siteConfig'; +import type {ComponentType, PropsWithChildren} from 'react'; +import type {DocSearchModalProps} from '@docsearch/react/modal'; export interface SearchProps { appId?: string; @@ -83,9 +85,10 @@ const options = { }; const DocSearchModal: any = lazy(() => - // @ts-ignore import('@docsearch/react/modal').then((mod) => ({ - default: mod.DocSearchModal, + default: mod.DocSearchModal as ComponentType< + PropsWithChildren + >, })) ); diff --git a/src/content/blog/2020/12/21/data-fetching-with-react-server-components.md b/src/content/blog/2020/12/21/data-fetching-with-react-server-components.md index e6a55fbb3..7d99f5ecc 100644 --- a/src/content/blog/2020/12/21/data-fetching-with-react-server-components.md +++ b/src/content/blog/2020/12/21/data-fetching-with-react-server-components.md @@ -5,7 +5,7 @@ date: 2020/12/21 description: 2020 年は長い 1 年でした。本年の最後に、我々の研究における特別なホリデーアップデートとして、バンドルサイズゼロで動作する React サーバコンポーネントの紹介をしたいと思います。 --- -December 21, 2020 by [Dan Abramov](https://twitter.com/dan_abramov), [Lauren Tan](https://twitter.com/potetotes), [Joseph Savona](https://twitter.com/en_JS), and [Sebastian Markbåge](https://twitter.com/sebmarkbage) +December 21, 2020 by [Dan Abramov](https://bsky.app/profile/danabra.mov), [Lauren Tan](https://twitter.com/potetotes), [Joseph Savona](https://twitter.com/en_JS), and [Sebastian Markbåge](https://twitter.com/sebmarkbage) --- diff --git a/src/content/blog/2021/06/08/the-plan-for-react-18.md b/src/content/blog/2021/06/08/the-plan-for-react-18.md index 431033436..9e8a2d928 100644 --- a/src/content/blog/2021/06/08/the-plan-for-react-18.md +++ b/src/content/blog/2021/06/08/the-plan-for-react-18.md @@ -5,7 +5,7 @@ date: 2021/06/08 description: React チームより幾つかのお知らせがあります! 次のメジャーバージョンとなる React 18 リリースに向けての作業を開始しました。コミュニティが React 18 の新機能を段階的に導入できるようにするため、ワーキンググループを作成しました。ライブラリの作者が試用してフィードバックを送れるようにするため、React 18 のアルファ版を公開しました。 --- -June 8, 2021 by [Andrew Clark](https://twitter.com/acdlite), [Brian Vaughn](https://github.com/bvaughn), [Christine Abernathy](https://twitter.com/abernathyca), [Dan Abramov](https://twitter.com/dan_abramov), [Rachel Nabors](https://twitter.com/rachelnabors), [Rick Hanlon](https://twitter.com/rickhanlonii), [Sebastian Markbåge](https://twitter.com/sebmarkbage), and [Seth Webster](https://twitter.com/sethwebster) +June 8, 2021 by [Andrew Clark](https://twitter.com/acdlite), [Brian Vaughn](https://github.com/bvaughn), [Christine Abernathy](https://twitter.com/abernathyca), [Dan Abramov](https://bsky.app/profile/danabra.mov), [Rachel Nabors](https://twitter.com/rachelnabors), [Rick Hanlon](https://twitter.com/rickhanlonii), [Sebastian Markbåge](https://twitter.com/sebmarkbage), and [Seth Webster](https://twitter.com/sethwebster) --- diff --git a/src/content/blog/2021/12/17/react-conf-2021-recap.md b/src/content/blog/2021/12/17/react-conf-2021-recap.md index d4ce4a1cb..55d89b186 100644 --- a/src/content/blog/2021/12/17/react-conf-2021-recap.md +++ b/src/content/blog/2021/12/17/react-conf-2021-recap.md @@ -131,7 +131,11 @@ React の学習や React による設計についての一連の発表は [Rache まずは発表者の方々に感謝します。[Aakansha Doshi](https://twitter.com/aakansha1216)、[Andrew Clark](https://twitter.com/acdlite)、[Brian Vaughn](https://twitter.com/brian_d_vaughn)、[Daishi Kato](https://twitter.com/dai_shi)、[Debbie O'Brien](https://twitter.com/debs_obrien)、[Delba de Oliveira](https://twitter.com/delba_oliveira)、[Diego Haz](https://twitter.com/diegohaz)、[Eric Rozell](https://twitter.com/EricRozell)、[Helen Lin](https://twitter.com/wizardlyhel)、[Juan Tejada](https://twitter.com/_jstejada)、[Lauren Tan](https://twitter.com/potetotes)、[Linton Ye](https://twitter.com/lintonye)、[Lyle Troxell](https://twitter.com/lyle)、[Rachel Nabors](https://twitter.com/rachelnabors)、[Rick Hanlon](https://twitter.com/rickhanlonii)、[Robert Balicki](https://twitter.com/StatisticsFTW)、[Roman Rädle](https://twitter.com/raedle)、[Sarah Rainsberger](https://twitter.com/sarah11918)、[Shaundai Person](https://twitter.com/shaundai)、[Shruti Kapoor](https://twitter.com/shrutikapoor08)、[Steven Moyes](https://twitter.com/moyessa)、[Tafu Nakazaki](https://twitter.com/hawaiiman0)、[Xuan Huang (黄玄)](https://twitter.com/Huxpro)。 +<<<<<<< HEAD 発表についてのフィードバックを頂いた方々に感謝します。[Andrew Clark](https://twitter.com/acdlite)、[Dan Abramov](https://twitter.com/dan_abramov)、[Dave McCabe](https://twitter.com/mcc_abe)、[Eli White](https://twitter.com/Eli_White)、[Joe Savona](https://twitter.com/en_JS)、[Lauren Tan](https://twitter.com/potetotes)、[Rachel Nabors](https://twitter.com/rachelnabors)、[Tim Yung](https://twitter.com/yungsters)。 +======= +Thanks to everyone who helped provide feedback on talks including [Andrew Clark](https://twitter.com/acdlite), [Dan Abramov](https://bsky.app/profile/danabra.mov), [Dave McCabe](https://twitter.com/mcc_abe), [Eli White](https://twitter.com/Eli_White), [Joe Savona](https://twitter.com/en_JS), [Lauren Tan](https://twitter.com/potetotes), [Rachel Nabors](https://twitter.com/rachelnabors), and [Tim Yung](https://twitter.com/yungsters). +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 カンファレンス Discord のセットアップを行い Discord 管理者になっていただいた [Lauren Tan](https://twitter.com/potetotes) に感謝します。 diff --git a/src/content/blog/2022/06/15/react-labs-what-we-have-been-working-on-june-2022.md b/src/content/blog/2022/06/15/react-labs-what-we-have-been-working-on-june-2022.md index c71d4e9f8..25ded5fd4 100644 --- a/src/content/blog/2022/06/15/react-labs-what-we-have-been-working-on-june-2022.md +++ b/src/content/blog/2022/06/15/react-labs-what-we-have-been-working-on-june-2022.md @@ -5,7 +5,7 @@ date: 2022/06/15 description: React 18 の完成は数年がかりの仕事であり、React チームはそこから貴重な教訓を得ることになりました。このリリースは何年も研究を行い、様々なアプローチを試した結果として生まれたものです。いくつかのアプローチはうまく行った一方で、多くは行き詰まって新たな知見のみをもたらすことになりました。ここから我々が学んだことは、我々がどんなことを試しているのかをコミュニティに知らせることなくただお待たせするというのは、フラストレーションの元だ、ということです。 --- -June 15, 2022 by [Andrew Clark](https://twitter.com/acdlite), [Dan Abramov](https://twitter.com/dan_abramov), [Jan Kassens](https://twitter.com/kassens), [Joseph Savona](https://twitter.com/en_JS), [Josh Story](https://twitter.com/joshcstory), [Lauren Tan](https://twitter.com/potetotes), [Luna Ruan](https://twitter.com/lunaruan), [Mengdi Chen](https://twitter.com/mengdi_en), [Rick Hanlon](https://twitter.com/rickhanlonii), [Robert Zhang](https://twitter.com/jiaxuanzhang01), [Sathya Gunasekaran](https://twitter.com/_gsathya), [Sebastian Markbåge](https://twitter.com/sebmarkbage), and [Xuan Huang](https://twitter.com/Huxpro) +June 15, 2022 by [Andrew Clark](https://twitter.com/acdlite), [Dan Abramov](https://bsky.app/profile/danabra.mov), [Jan Kassens](https://twitter.com/kassens), [Joseph Savona](https://twitter.com/en_JS), [Josh Story](https://twitter.com/joshcstory), [Lauren Tan](https://twitter.com/potetotes), [Luna Ruan](https://twitter.com/lunaruan), [Mengdi Chen](https://twitter.com/mengdi_en), [Rick Hanlon](https://twitter.com/rickhanlonii), [Robert Zhang](https://twitter.com/jiaxuanzhang01), [Sathya Gunasekaran](https://twitter.com/_gsathya), [Sebastian Markbåge](https://twitter.com/sebmarkbage), and [Xuan Huang](https://twitter.com/Huxpro) --- @@ -27,7 +27,11 @@ June 15, 2022 by [Andrew Clark](https://twitter.com/acdlite), [Dan Abramov](http 特に、I/O ライブラリをフォークして例えば react-fetch のようなものを作成していく、というアイディアは捨て去ることにし、代わりに互換性のために async/await モデルを採用することにします。データフェッチングにはルータを使うこともできるのでこれにより RSC のリリースが遅れるということはありません。もうひとつの変更は、ファイルの拡張子でサーバコンポーネントかどうかを区別するというアプローチをやめ、[区別を注釈で行う](https://github.com/reactjs/rfcs/pull/189#issuecomment-1116482278)ことにする、というものです。 +<<<<<<< HEAD Webpack と Vite の両方で振る舞いが同じになるようバンドラのサポートを共通化することについて、Vercel および Shopify とともに取り組んでいます。リリース前に、React のエコシステム全体で RSC の振る舞いが同じになるようにしたいと考えています。この部分が安定化前の最大の障壁となっています。 +======= +We’re working together with Vercel and Shopify to unify bundler support for shared semantics in both webpack and Vite. Before launch, we want to make sure that the semantics of RSCs are the same across the whole React ecosystem. This is the major blocker for reaching stable. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ## アセットのロード {/*asset-loading*/} diff --git a/src/content/blog/2023/03/16/introducing-react-dev.md b/src/content/blog/2023/03/16/introducing-react-dev.md index 804dd19f1..ed75f0af2 100644 --- a/src/content/blog/2023/03/16/introducing-react-dev.md +++ b/src/content/blog/2023/03/16/introducing-react-dev.md @@ -5,7 +5,7 @@ date: 2023/03/16 description: 本日、React とそのドキュメントの新しいホームとなる react.dev の立ち上げを発表することができ、大変うれしく思います。この記事では、新しいサイトの見どころをご紹介します。 --- -March 16, 2023 by [Dan Abramov](https://twitter.com/dan_abramov) and [Rachel Nabors](https://twitter.com/rachelnabors) +March 16, 2023 by [Dan Abramov](https://bsky.app/profile/danabra.mov) and [Rachel Nabors](https://twitter.com/rachelnabors) --- @@ -631,7 +631,11 @@ React を学ぶには、今がこれまでで最高のタイミングだと思 ## 誰がこのプロジェクトに取り組んだのか? {/*who-worked-on-this*/} +<<<<<<< HEAD React チームでは、[Rachel Nabors](https://twitter.com/rachelnabors/) がプロジェクトをリードし(イラストも提供)、[Dan Abramov](https://twitter.com/dan_abramov) がカリキュラムをデザインしました。この 2 人が共同でほとんどのコンテンツを執筆しました。 +======= +On the React team, [Rachel Nabors](https://twitter.com/rachelnabors/) led the project (and provided the illustrations), and [Dan Abramov](https://bsky.app/profile/danabra.mov) designed the curriculum. They co-authored most of the content together as well. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 もちろん、これほど大きなプロジェクトが少人数で進むことはありません。お礼を言いたい方がたくさんいます! diff --git a/src/content/blog/2023/03/22/react-labs-what-we-have-been-working-on-march-2023.md b/src/content/blog/2023/03/22/react-labs-what-we-have-been-working-on-march-2023.md index 73d3db3f3..413257760 100644 --- a/src/content/blog/2023/03/22/react-labs-what-we-have-been-working-on-march-2023.md +++ b/src/content/blog/2023/03/22/react-labs-what-we-have-been-working-on-march-2023.md @@ -97,9 +97,16 @@ Transition Tracing API により、[React のトランジション](/reference/r * * * このページでのアップデートに加えて、私たちのチームは最近、コミュニティのポッドキャストやライブストリームにゲスト出演し、取り組みについてより多くのことをお話しし、質問に答える機会がありました。 +<<<<<<< HEAD * [Dan Abramov](https://twitter.com/dan_abramov) と [Joe Savona](https://twitter.com/en_JS) は [Kent C. Dodds の YouTube チャンネル](https://www.youtube.com/watch?v=h7tur48JSaw) でインタビューを受け、React Server Components に関する懸念について議論を行いました。 * [Dan Abramov](https://twitter.com/dan_abramov) と [Joe Savona](https://twitter.com/en_JS) は [JSParty ポッドキャスト](https://jsparty.fm/267) のゲストとして招かれ、React の未来についての考えを共有しました。 この投稿のレビューに協力していただいた [Andrew Clark](https://twitter.com/acdlite)、[Dan Abramov](https://twitter.com/dan_abramov)、[Dave McCabe](https://twitter.com/mcc_abe)、[Luna Wei](https://twitter.com/lunaleaps)、[Matt Carroll](https://twitter.com/mattcarrollcode)、[Sean Keegan](https://twitter.com/DevRelSean)、[Sebastian Silbermann](https://twitter.com/sebsilbermann)、[Seth Webster](https://twitter.com/sethwebster)、[Sophie Alpert](https://twitter.com/sophiebits) に感謝します。 +======= +* [Dan Abramov](https://bsky.app/profile/danabra.mov) and [Joe Savona](https://twitter.com/en_JS) were interviewed by [Kent C. Dodds on his YouTube channel](https://www.youtube.com/watch?v=h7tur48JSaw), where they discussed concerns around React Server Components. +* [Dan Abramov](https://bsky.app/profile/danabra.mov) and [Joe Savona](https://twitter.com/en_JS) were guests on the [JSParty podcast](https://jsparty.fm/267) and shared their thoughts about the future of React. + +Thanks to [Andrew Clark](https://twitter.com/acdlite), [Dan Abramov](https://bsky.app/profile/danabra.mov), [Dave McCabe](https://twitter.com/mcc_abe), [Luna Wei](https://twitter.com/lunaleaps), [Matt Carroll](https://twitter.com/mattcarrollcode), [Sean Keegan](https://twitter.com/DevRelSean), [Sebastian Silbermann](https://twitter.com/sebsilbermann), [Seth Webster](https://twitter.com/sethwebster), and [Sophie Alpert](https://twitter.com/sophiebits) for reviewing this post. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 お読みいただきありがとうございました。次のアップデートでお会いしましょう! diff --git a/src/content/blog/2023/05/03/react-canaries.md b/src/content/blog/2023/05/03/react-canaries.md index 6d9242022..ab068d91f 100644 --- a/src/content/blog/2023/05/03/react-canaries.md +++ b/src/content/blog/2023/05/03/react-canaries.md @@ -5,7 +5,7 @@ date: 2023/05/03 description: 私たちは、安定版がリリースされる前に、個々の新機能の設計がほぼ確定した段階でそれらを採用できるという選択肢を、React コミュニティに提供したいと考えています。これは、Meta が長年、React の最先端バージョンを社内で使用してきたやり方に似ています。私たちは、新たに公式サポート対象となる Canary リリースチャンネルを導入します。これにより、フレームワークのような統合済セットアップが、個々の React 機能の採用を React のリリーススケジュールから切り離して行えるようになります。 --- -May 3, 2023 by [Dan Abramov](https://twitter.com/dan_abramov), [Sophie Alpert](https://twitter.com/sophiebits), [Rick Hanlon](https://twitter.com/rickhanlonii), [Sebastian Markbåge](https://twitter.com/sebmarkbage), and [Andrew Clark](https://twitter.com/acdlite) +May 3, 2023 by [Dan Abramov](https://bsky.app/profile/danabra.mov), [Sophie Alpert](https://twitter.com/sophiebits), [Rick Hanlon](https://twitter.com/rickhanlonii), [Sebastian Markbåge](https://twitter.com/sebmarkbage), and [Andrew Clark](https://twitter.com/acdlite) --- diff --git a/src/content/blog/2024/02/15/react-labs-what-we-have-been-working-on-february-2024.md b/src/content/blog/2024/02/15/react-labs-what-we-have-been-working-on-february-2024.md index bf2f882d6..b95c82e4d 100644 --- a/src/content/blog/2024/02/15/react-labs-what-we-have-been-working-on-february-2024.md +++ b/src/content/blog/2024/02/15/react-labs-what-we-have-been-working-on-february-2024.md @@ -5,7 +5,7 @@ date: 2024/02/15 description: React Labs 記事では、現在活発に研究・開発が行われているプロジェクトについて述べていきます。前回のアップデートから大きな進展がありましたので、我々が学んだことを共有していきます。 --- -February 15, 2024 by [Joseph Savona](https://twitter.com/en_JS), [Ricky Hanlon](https://twitter.com/rickhanlonii), [Andrew Clark](https://twitter.com/acdlite), [Matt Carroll](https://twitter.com/mattcarrollcode), and [Dan Abramov](https://twitter.com/dan_abramov). +February 15, 2024 by [Joseph Savona](https://twitter.com/en_JS), [Ricky Hanlon](https://twitter.com/rickhanlonii), [Andrew Clark](https://twitter.com/acdlite), [Matt Carroll](https://twitter.com/mattcarrollcode), and [Dan Abramov](https://bsky.app/profile/danabra.mov). --- diff --git a/src/content/blog/2024/04/25/react-19-upgrade-guide.md b/src/content/blog/2024/04/25/react-19-upgrade-guide.md index 6d2c92abb..b68c0ff48 100644 --- a/src/content/blog/2024/04/25/react-19-upgrade-guide.md +++ b/src/content/blog/2024/04/25/react-19-upgrade-guide.md @@ -24,7 +24,11 @@ React 19 へのアップグレードを容易にするため、`react@18.3` リ React 19 にアップグレードする前に、問題点を見つけるためにまず React 18.3 にアップグレードすることをお勧めします。 +<<<<<<< HEAD 18.3 における変更点については、[リリースノート](https://github.com/facebook/react/blob/main/CHANGELOG.md)をご覧ください。 +======= +For a list of changes in 18.3 see the [Release Notes](https://github.com/facebook/react/blob/main/CHANGELOG.md#1830-april-25-2024). +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -113,7 +117,7 @@ npx codemod@latest react/19/migration-recipe - [`replace-string-ref`](https://github.com/reactjs/react-codemod?tab=readme-ov-file#replace-string-ref) - [`replace-act-import`](https://github.com/reactjs/react-codemod?tab=readme-ov-file#replace-act-import) - [`replace-use-form-state`](https://github.com/reactjs/react-codemod?tab=readme-ov-file#replace-use-form-state) -- [`prop-types-typescript`](https://codemod.com/registry/react-prop-types-typescript) +- [`prop-types-typescript`](https://github.com/reactjs/react-codemod#react-proptypes-to-prop-types) これには TypeScript 関連の変更は含まれていません。以下の [TypeScript 関連の変更](#typescript-changes)を参照してください。 diff --git a/src/content/blog/2024/05/22/react-conf-2024-recap.md b/src/content/blog/2024/05/22/react-conf-2024-recap.md index edbac1810..538ba0e64 100644 --- a/src/content/blog/2024/05/22/react-conf-2024-recap.md +++ b/src/content/blog/2024/05/22/react-conf-2024-recap.md @@ -42,7 +42,7 @@ _[1 日目の全ストリームはこちらから視聴できます。](https:// - [React Unpacked: A Roadmap to React 19](https://www.youtube.com/watch?v=T8TZQ6k4SLE&t=10112s) by [Sam Selikoff](https://twitter.com/samselikoff) - [React 19 Deep Dive: Coordinating HTML](https://www.youtube.com/watch?v=T8TZQ6k4SLE&t=24916s) by [Josh Story](https://twitter.com/joshcstory) - [Enhancing Forms with React Server Components](https://www.youtube.com/watch?v=0ckOUBiuxVY&t=25280s) by [Aurora Walberg Scharff](https://twitter.com/aurorascharff) -- [React for Two Computers](https://www.youtube.com/watch?v=T8TZQ6k4SLE&t=18825s) by [Dan Abramov](https://twitter.com/dan_abramov2) +- [React for Two Computers](https://www.youtube.com/watch?v=T8TZQ6k4SLE&t=18825s) by [Dan Abramov](https://bsky.app/profile/danabra.mov) - [And Now You Understand React Server Components](https://www.youtube.com/watch?v=0ckOUBiuxVY&t=11256s) by [Kent C. Dodds](https://twitter.com/kentcdodds) 基調講演の締めくくりとして、[Joe Savona](https://twitter.com/en_JS)、[Sathya Gunasekaran](https://twitter.com/_gsathya)、[Mofei Zhang](https://twitter.com/zmofei) が、React Compiler が[オープンソース](https://github.com/facebook/react/pull/29061)化されたことを発表し、React Compiler の実験バージョンを共有しました。 diff --git a/src/content/blog/2024/12/05/react-19.md b/src/content/blog/2024/12/05/react-19.md index f9f21c1e0..8c76e5b70 100644 --- a/src/content/blog/2024/12/05/react-19.md +++ b/src/content/blog/2024/12/05/react-19.md @@ -294,7 +294,11 @@ A component was suspended by an uncached promise. Creating promises inside a Cli +<<<<<<< HEAD 修正するには、プロミスをキャッシュできるサスペンス対応のライブラリまたはフレームワークで作られたプロミスを渡す必要があります。将来的には、レンダー中にプロミスをキャッシュしやすくする機能を提供する予定です。 +======= +To fix, you need to pass a promise from a Suspense powered library or framework that supports caching for promises. In the future we plan to ship features to make it easier to cache promises in render. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 diff --git a/src/content/blog/2025/02/14/sunsetting-create-react-app.md b/src/content/blog/2025/02/14/sunsetting-create-react-app.md new file mode 100644 index 000000000..9ced6231c --- /dev/null +++ b/src/content/blog/2025/02/14/sunsetting-create-react-app.md @@ -0,0 +1,320 @@ +--- +title: "Sunsetting Create React App" +author: Matt Carroll and Ricky Hanlon +date: 2025/02/14 +description: Today, we’re deprecating Create React App for new apps, and encouraging existing apps to migrate to a framework, or to migrate to a build tool like Vite, Parcel, or RSBuild. We’re also providing docs for when a framework isn’t a good fit for your project, you want to build your own framework, or you just want to learn how React works by building a React app from scratch. +--- + +February 14, 2025 by [Matt Carroll](https://twitter.com/mattcarrollcode) and [Ricky Hanlon](https://bsky.app/profile/ricky.fm) + +--- + + + +Today, we’re deprecating [Create React App](https://create-react-app.dev/) for new apps, and encouraging existing apps to migrate to a [framework](#how-to-migrate-to-a-framework), or to [migrate to a build tool](#how-to-migrate-to-a-build-tool) like Vite, Parcel, or RSBuild. + +We’re also providing docs for when a framework isn’t a good fit for your project, you want to build your own framework, or you just want to learn how React works by [building a React app from scratch](/learn/build-a-react-app-from-scratch). + + + +----- + +When we released Create React App in 2016, there was no clear way to build a new React app. + +To create a React app, you had to install a bunch of tools and wire them up together yourself to support basic features like JSX, linting, and hot reloading. This was very tricky to do correctly, so the [community](https://github.com/react-boilerplate/react-boilerplate) [created](https://github.com/kriasoft/react-starter-kit) [boilerplates](https://github.com/petehunt/react-boilerplate) for [common](https://github.com/gaearon/react-hot-boilerplate) [setups](https://github.com/erikras/react-redux-universal-hot-example). However, boilerplates were difficult to update and fragmentation made it difficult for React to release new features. + +Create React App solved these problems by combining several tools into a single recommended configuration. This allowed apps a simple way to upgrade to new tooling features, and allowed the React team to deploy non-trivial tooling changes (Fast Refresh support, React Hooks lint rules) to the broadest possible audience. + +This model became so popular that there's an entire category of tools working this way today. + +## Deprecating Create React App {/*deprecating-create-react-app*/} + +Although Create React App makes it easy to get started, [there are several limitations](#limitations-of-build-tools) that make it difficult to build high performant production apps. In principle, we could solve these problems by essentially evolving it into a [framework](#why-we-recommend-frameworks). + +However, since Create React App currently has no active maintainers, and there are many existing frameworks that solve these problems already, we’ve decided to deprecate Create React App. + +Starting today, if you install a new app, you will see a deprecation warning: + + + + +create-react-app is deprecated. +{'\n\n'} +You can find a list of up-to-date React frameworks on react.dev +For more info see: react.dev/link/cra +{'\n\n'} +This error message will only be shown once per install. + + + + +We've also added a deprecation notice to the Create React App [website](https://create-react-app.dev/) and GitHub [repo](https://github.com/facebook/create-react-app). Create React App will continue working in maintenance mode, and we've published a new version of Create React App to work with React 19. + +## How to Migrate to a Framework {/*how-to-migrate-to-a-framework*/} +We recommend [creating new React apps](/learn/creating-a-react-app) with a framework. All the frameworks we recommend support client-side rendering ([CSR](https://developer.mozilla.org/en-US/docs/Glossary/CSR)) and single-page apps ([SPA](https://developer.mozilla.org/en-US/docs/Glossary/SPA)), and can be deployed to a CDN or static hosting service without a server. + +For existing apps, these guides will help you migrate to a client-only SPA: + +* [Next.js’ Create React App migration guide](https://nextjs.org/docs/app/building-your-application/upgrading/from-create-react-app) +* [React Router’s framework adoption guide](https://reactrouter.com/upgrading/component-routes). +* [Expo webpack to Expo Router migration guide](https://docs.expo.dev/router/migrate/from-expo-webpack/) + +## How to Migrate to a Build Tool {/*how-to-migrate-to-a-build-tool*/} + +If your app has unusual constraints, or you prefer to solve these problems by building your own framework, or you just want to learn how react works from scratch, you can roll your own custom setup with React using Vite, Parcel or Rsbuild. + +For existing apps, these guides will help you migrate to a build tool: + +* [Vite Create React App migration guide](https://www.robinwieruch.de/vite-create-react-app/) +* [Parcel Create React App migration guide](https://parceljs.org/migration/cra/) +* [Rsbuild Create React App migration guide](https://rsbuild.dev/guide/migration/cra) + +To help get started with Vite, Parcel or Rsbuild, we've added new docs for [Building a React App from Scratch](/learn/build-a-react-app-from-scratch). + + + +#### Do I need a framework? {/*do-i-need-a-framework*/} + +Most apps would benefit from a framework, but there are valid cases to build a React app from scratch. A good rule of thumb is if your app needs routing, you would probably benefit from a framework. + +Just like Svelte has Sveltekit, Vue has Nuxt, and Solid has SolidStart, [React recommends using a framework](#why-we-recommend-frameworks) that fully integrates routing into features like data-fetching and code-splitting out of the box. This avoids the pain of needing to write your own complex configurations and essentially build a framework yourself. + +However, you can always [build a React app from scratch](/learn/build-a-react-app-from-scratch) using a build tool like Vite, Parcel, or Rsbuild. + + + +Continue reading to learn more about the [limitations of build tools](#limitations-of-build-tools) and [why we recommend frameworks](#why-we-recommend-frameworks). + +## Limitations of Build Tools {/*limitations-of-build-tools*/} + +Create React App and build tools like it make it easy to get started building a React app. After running `npx create-react-app my-app`, you get a fully configured React app with a development server, linting, and a production build. + +For example, if you're building an internal admin tool, you can start with a landing page: + +```js +export default function App() { + return ( +
      +

      Welcome to the Admin Tool!

      +
      + ) +} +``` + +This allows you to immediately start coding in React with features like JSX, default linting rules, and a bundler to run in both development and production. However, this setup is missing the tools you need to build a real production app. + +Most production apps need solutions to problems like routing, data fetching, and code splitting. + +### Routing {/*routing*/} + +Create React App does not include a specific routing solution. If you're just getting started, one option is to use `useState` to switch between routes. But doing this means that you can't share links to your app - every link would go to the same page - and structuring your app becomes difficult over time: + +```js +import {useState} from 'react'; + +import Home from './Home'; +import Dashboard from './Dashboard'; + +export default function App() { + // ❌ Routing in state does not create URLs + const [route, setRoute] = useState('home'); + return ( +
      + {route === 'home' && } + {route === 'dashboard' && } +
      + ) +} +``` + +This is why most apps that use Create React App solve add routing with a routing library like [React Router](https://reactrouter.com/) or [Tanstack Router](https://tanstack.com/router/latest). With a routing library, you can add additional routes to the app, which provides opinions on the structure of your app, and allows you to start sharing links to routes. For example, with React Router you can define routes: + +```js +import {RouterProvider, createBrowserRouter} from 'react-router'; + +import Home from './Home'; +import Dashboard from './Dashboard'; + +// ✅ Each route has it's own URL +const router = createBrowserRouter([ + {path: '/', element: }, + {path: '/dashboard', element: } +]); + +export default function App() { + return ( + + ) +} +``` + +With this change, you can share a link to `/dashboard` and the app will navigate to the dashboard page . Once you have a routing library, you can add additional features like nested routes, route guards, and route transitions, which are difficult to implement without a routing library. + +There's a tradeoff being made here: the routing library adds complexity to the app, but it also adds features that are difficult to implement without it. + +### Data Fetching {/*data-fetching*/} + +Another common problem in Create React App is data fetching. Create React App does not include a specific data fetching solution. If you're just getting started, a common option is to use `fetch` in an effect to load data. + +But doing this means that the data is fetched after the component renders, which can cause network waterfalls. Network waterfalls are caused by fetching data when your app renders instead of in parallel while the code is downloading: + +```js +export default function Dashboard() { + const [data, setData] = useState(null); + + // ❌ Fetching data in a component causes network waterfalls + useEffect(() => { + fetch('/api/data') + .then(response => response.json()) + .then(data => setData(data)); + }, []); + + return ( +
      + {data.map(item =>
      {item.name}
      )} +
      + ) +} +``` + +Fetching in an effect means the user has to wait longer to see the content, even though the data could have been fetched earlier. To solve this, you can use a data fetching library like [React Query](https://react-query.tanstack.com/), [SWR](https://swr.vercel.app/), [Apollo](https://www.apollographql.com/docs/react), or [Relay](https://relay.dev/) which provide options to prefetch data so the request is started before the component renders. + +These libraries work best when integrated with your routing "loader" pattern to specify data dependencies at the route level, which allows the router to optimize your data fetches: + +```js +export async function loader() { + const response = await fetch(`/api/data`); + const data = await response.json(); + return data; +} + +// ✅ Fetching data in parallel while the code is downloading +export default function Dashboard({loaderData}) { + return ( +
      + {loaderData.map(item =>
      {item.name}
      )} +
      + ) +} +``` + +On initial load, the router can fetch the data immediately before the route is rendered. As the user navigates around the app, the router is able to fetch both the data and the route at the same time, parallelizing the fetches. This reduces the time it takes to see the content on the screen, and can improve the user experience. + +However, this requires correctly configuring the loaders in your app and trades off complexity for performance. + +### Code Splitting {/*code-splitting*/} + +Another common problem in Create React App is [code splitting](https://www.patterns.dev/vanilla/bundle-splitting). Create React App does not include a specific code splitting solution. If you're just getting started, you might not consider code splitting at all. + +This means your app is shipped as a single bundle: + +```txt +- bundle.js 75kb +``` + +But for ideal performance, you should "split" your code into separate bundles so the user only needs to download what they need. This decreases the time the user needs to wait to load your app, by only downloading the code they need to see the page they are on. + +```txt +- core.js 25kb +- home.js 25kb +- dashboard.js 25kb +``` + +One way to do code-splitting is with `React.lazy`. However, this means that the code is not fetched until the component renders, which can cause network waterfalls. A more optimal solution is to use a router feature that fetches the code in parallel while the code is downloading. For example, React Router provides a `lazy` option to specify that a route should be code split and optimize when it is loaded: + +```js +import Home from './Home'; +import Dashboard from './Dashboard'; + +// ✅ Routes are downloaded before rendering +const router = createBrowserRouter([ + {path: '/', lazy: () => import('./Home')}, + {path: '/dashboard', lazy: () => import('Dashboard')} +]); +``` + +Optimized code-splitting is tricky to get right, and it's easy to make mistakes that can cause the user to download more code than they need. It works best when integrated with your router and data loading solutions to maximize caching, parallelize fetches, and support ["import on interaction"](https://www.patterns.dev/vanilla/import-on-interaction) patterns. + +### And more... {/*and-more*/} + +These are just a few examples of the limitations of Create React App. + +Once you've integrated routing, data-fetching, and code splitting, you now also need to consider pending states, navigation interruptions, error messages to the user, and revalidation of the data. There are entire categories of problems that users need to solve like: + +
      +
        +
      • Accessibility
      • +
      • Asset loading
      • +
      • Authentication
      • +
      • Caching
      • +
      +
        +
      • Error handling
      • +
      • Mutating data
      • +
      • Navigations
      • +
      • Optimistic updates
      • +
      +
        +
      • Progressive enhancement
      • +
      • Server-side rendering
      • +
      • Static site generation
      • +
      • Streaming
      • +
      +
      + +All of these work together to create the most optimal [loading sequence](https://www.patterns.dev/vanilla/loading-sequence). + +Solving each of these problems individually in Create React App can be difficult as each problem is interconnected with the others and can require deep expertise in problem areas users may not be familiar with. In order to solve these problems, users end up building their own bespoke solutions on top of Create React App, which was the problem Create React App originally tried to solve. + +## Why we Recommend Frameworks {/*why-we-recommend-frameworks*/} + +Although you could solve all these pieces yourself in a build tool like Create React App, Vite, or Parcel, it is hard to do well. Just like when Create React App itself integrated several build tools together, you need a tool to integrate all of these features together to provide the best experience to users. + +This category of tools that integrates build tools, rendering, routing, data fetching, and code splitting are known as "frameworks" -- or if you prefer to call React itself a framework, you might call them "metaframeworks". + +Frameworks impose some opinions about structuring your app in order to provide a much better user experience, in the same way build tools impose some opinions to make tooling easier. This is why we started recommending frameworks like [Next.js](https://nextjs.org/), [React Router](https://reactrouter.com/), and [Expo](https://expo.dev/) for new projects. + +Frameworks provide the same getting started experience as Create React App, but also provide solutions to problems users need to solve anyway in real production apps. + + + +#### Server rendering is optional {/*server-rendering-is-optional*/} + +The frameworks we recommend all provide the option to create a [client-side rendered (CSR)](https://developer.mozilla.org/en-US/docs/Glossary/CSR) app. + +In some cases, CSR is the right choice for a page, but many times it's not. Even if most of your app is client-side, there are often individual pages that could benefit from server rendering features like [static-site generation (SSG)](https://developer.mozilla.org/en-US/docs/Glossary/SSG) or [server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR), for example a Terms of Service page, or documentation. + +Server rendering generally sends less JavaScript to the client, and a full HTML document which produces a faster [First Contentful Paint (FCP)](https://web.dev/articles/fcp) by reducing [Total Blocking Time (TBD)](https://web.dev/articles/tbt), which can also lower [Interaction to Next Paint (INP)](https://web.dev/articles/inp). This is why the [Chrome team has encouraged](https://web.dev/articles/rendering-on-the-web) developers to consider static or server-side render over a full client-side approach to achieve the best possible performance. + +There are tradeoffs to using a server, and it is not always the best option for every page. Generating pages on the server incurs additional cost and takes time to generate which can increase [Time to First Byte (TTFB)](https://web.dev/articles/ttfb). The best performing apps are able to pick the right rendering strategy on a per-page basis, based on the tradeoffs of each strategy. + +Frameworks provide the option to use a server on any page if you want to, but do not force you to use a server. This allows you to pick the right rendering strategy for each page in your app. + +#### What About Server Components {/*server-components*/} + +The frameworks we recommend also include support for React Server Components. + +Server Components help solve these problems by moving routing and data fetching to the server, and allowing code splitting to be done for client components based on the data you render, instead of just the route rendered, and reducing the amount of JavaScript shipped for the best possible [loading sequence](https://www.patterns.dev/vanilla/loading-sequence). + +Server Components do not require a server. They can be run at build time on your CI server to create a static-site generated app (SSG) app, at runtime on a web server for a server-side rendered (SSR) app. + +See [Introducing zero-bundle size React Server Components](/blog/2020/12/21/data-fetching-with-react-server-components) and [the docs](/reference/rsc/server-components) for more info. + + + + + +#### Server Rendering is not just for SEO {/*server-rendering-is-not-just-for-seo*/} + +A common misunderstanding is that server rendering is only for [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO). + +While server rendering can improve SEO, it also improves performance by reducing the amount of JavaScript the user needs to download and parse before they can see the content on the screen. + +This is why the Chrome team [has encouraged](https://web.dev/articles/rendering-on-the-web) developers to consider static or server-side render over a full client-side approach to achieve the best possible performance. + + + +--- + +_Thank you to [Dan Abramov](https://bsky.app/profile/danabra.mov) for creating Create React App, and [Joe Haddad](https://github.com/Timer), [Ian Schmitz](https://github.com/ianschmitz), [Brody McKee](https://github.com/mrmckeb), and [many others](https://github.com/facebook/create-react-app/graphs/contributors) for maintaining Create React App over the years. Thank you to [Brooks Lybrand](https://bsky.app/profile/brookslybrand.bsky.social), [Dan Abramov](https://bsky.app/profile/danabra.mov), [Devon Govett](https://bsky.app/profile/devongovett.bsky.social), [Eli White](https://x.com/Eli_White), [Jack Herrington](https://bsky.app/profile/jherr.dev), [Joe Savona](https://x.com/en_JS), [Lauren Tan](https://bsky.app/profile/no.lol), [Lee Robinson](https://x.com/leeerob), [Mark Erikson](https://bsky.app/profile/acemarke.dev), [Ryan Florence](https://x.com/ryanflorence), [Sophie Alpert](https://bsky.app/profile/sophiebits.com), [Tanner Linsley](https://bsky.app/profile/tannerlinsley.com), and [Theo Browne](https://x.com/theo) for reviewing and providing feedback on this post._ + diff --git a/src/content/blog/index.md b/src/content/blog/index.md index 87b67b1e0..9a75ac779 100644 --- a/src/content/blog/index.md +++ b/src/content/blog/index.md @@ -4,7 +4,13 @@ title: React Blog +<<<<<<< HEAD React チームからの公式な更新のお知らせはこのブログに掲載されます。リリースノートや非推奨化のお知らせなどの重要なことはすべて、まずこちらに掲載されます。Twitter の [@reactjs](https://twitter.com/reactjs) フォローすることもできますが、このブログさえ読んでいれば、重要なことを見逃す心配はありません。 +======= +This blog is the official source for the updates from the React team. Anything important, including release notes or deprecation notices, will be posted here first. + +You can also follow the [@react.dev](https://bsky.app/profile/react.dev) account on Bluesky, or [@reactjs](https://twitter.com/reactjs) account on Twitter, but you won’t miss anything essential if you only read this blog. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -14,6 +20,12 @@ React チームからの公式な更新のお知らせはこのブログに掲
      + + +Today, we’re deprecating Create React App for new apps, and encouraging existing apps to migrate to a framework, or to migrate to a build tool like Vite, Parcel, or RSBuild. We’re also providing docs for when a framework isn’t a good fit for your project, you want to build your own framework, or you just want to learn how React works by building a React app from scratch ... + + + React 19 アップグレードガイドでは、アプリを React 19 にアップグレードするためのステップバイステップガイドをお示ししました。この投稿では、React 19 の新機能と、それらをどのように採用するかについて概説します。 diff --git a/src/content/community/acknowledgements.md b/src/content/community/acknowledgements.md index 575223321..a58f44283 100644 --- a/src/content/community/acknowledgements.md +++ b/src/content/community/acknowledgements.md @@ -36,6 +36,8 @@ title: 謝辞 * [Joe Critchley](https://github.com/joecritch) * [Jeff Morrison](https://github.com/jeffmo) * [Luna Ruan](https://github.com/lunaruan) +* [Luna Wei](https://github.com/lunaleaps) +* [Noah Lemen](https://github.com/noahlemen) * [Kathryn Middleton](https://github.com/kmiddleton14) * [Keyan Zhang](https://github.com/keyz) * [Marco Salazar](https://github.com/salazarm) @@ -51,9 +53,10 @@ title: 謝辞 * [Samuel Susla](https://github.com/sammy-SC) * [Sander Spies](https://github.com/sanderspies) * [Sasha Aickin](https://github.com/aickin) -* [Sean Keegan](https://github.com/seanryankeegan) +* [Sathya Gunasekaran](https://github.com/gsathya) * [Sophia Shoemaker](https://github.com/mrscobbler) * [Sunil Pai](https://github.com/threepointone) +* [Tianyu Yao](https://github.com/) * [Tim Yung](https://github.com/yungsters) * [Xuan Huang](https://github.com/huxpro) diff --git a/src/content/community/conferences.md b/src/content/community/conferences.md index f4c40ca34..2422a09ce 100644 --- a/src/content/community/conferences.md +++ b/src/content/community/conferences.md @@ -10,23 +10,59 @@ title: React カンファレンス ## Upcoming Conferences {/*upcoming-conferences*/} -### React Day Berlin 2024 {/*react-day-berlin-2024*/} -December 13 & 16, 2024. In-person in Berlin, Germany + remote (hybrid event) +### React Paris 2025 {/*react-paris-2025*/} +March 20 - 21, 2025. In-person in Paris, France (hybrid event) -[Website](https://reactday.berlin/) - [Twitter](https://x.com/reactdayberlin) +[Website](https://react.paris/) - [Twitter](https://x.com/BeJS_) + +### React Native Connection 2025 {/*react-native-connection-2025*/} +April 3 (Reanimated Training) + April 4 (Conference), 2025. Paris, France. + +[Website](https://reactnativeconnection.io/) - [X](https://x.com/reactnativeconn) - [Bluesky](https://bsky.app/profile/reactnativeconnect.bsky.social) + +### CityJS London 2025 {/*cityjs-london*/} +April 23 - 25, 2025. In-person in London, UK + +[Website](https://london.cityjsconf.org/) - [Twitter](https://x.com/cityjsconf) - [Bluesky](https://bsky.app/profile/cityjsconf.bsky.social) ### App.js Conf 2025 {/*appjs-conf-2025*/} May 28 - 30, 2025. In-person in Kraków, Poland + remote [Website](https://appjs.co) - [Twitter](https://twitter.com/appjsconf) +### CityJS Athens 2025 {/*cityjs-athens*/} +May 27 - 31, 2025. In-person in Athens, Greece + +[Website](https://athens.cityjsconf.org/) - [Twitter](https://x.com/cityjsconf) - [Bluesky](https://bsky.app/profile/cityjsconf.bsky.social) + ### React Summit 2025 {/*react-summit-2025*/} June 13 - 17, 2025. In-person in Amsterdam, Netherlands + remote (hybrid event) [Website](https://reactsummit.com/) - [Twitter](https://x.com/reactsummit) +### React Nexus 2025 {/*react-nexus-2025*/} +July 03 - 05, 2025. In-person in Bangalore, India + +[Website](https://reactnexus.com/) - [Twitter](https://x.com/ReactNexus) - [Bluesky](https://bsky.app/profile/reactnexus.com) - [Linkedin](https://www.linkedin.com/company/react-nexus) - [YouTube](https://www.youtube.com/reactify_in) + +### React Universe Conf 2025 {/*react-universe-conf-2025*/} +September 2-4, 2025. Wrocław, Poland. + +[Website](https://www.reactuniverseconf.com/) - [Twitter](https://twitter.com/react_native_eu) - [LinkedIn](https://www.linkedin.com/events/reactuniverseconf7163919537074118657/) + +### React India 2025 {/*react-india-2025*/} +October 31 - November 01, 2025. In-person in Goa, India (hybrid event) + Oct 15 2025 - remote day + +[Website](https://www.reactindia.io) - [Twitter](https://twitter.com/react_india) - [Facebook](https://www.facebook.com/ReactJSIndia) - [Youtube](https://www.youtube.com/channel/UCaFbHCBkPvVv1bWs_jwYt3w) + + ## Past Conferences {/*past-conferences*/} +### React Day Berlin 2024 {/*react-day-berlin-2024*/} +December 13 & 16, 2024. In-person in Berlin, Germany + remote (hybrid event) + +[Website](https://reactday.berlin/) - [Twitter](https://x.com/reactdayberlin) + ### React Africa 2024 {/*react-africa-2024*/} November 29, 2024. In-person in Casablanca, Morocco (hybrid event) @@ -55,7 +91,7 @@ October 25, 2024. In-person in Verona, Italy + online (hybrid event) ### React Brussels 2024 {/*react-brussels-2024*/} October 18, 2024. In-person in Brussels, Belgium (hybrid event) -[Website](https://www.react.brussels/) - [Twitter](https://x.com/BrusselsReact) +[Website](https://www.react.brussels/) - [Twitter](https://x.com/BrusselsReact) - [YouTube](https://www.youtube.com/playlist?list=PL53Z0yyYnpWimQ0U75woee2zNUIFsiDC3) ### React India 2024 {/*react-india-2024*/} October 17 - 19, 2024. In-person in Goa, India (hybrid event) + Oct 15 2024 - remote day diff --git a/src/content/community/docs-contributors.md b/src/content/community/docs-contributors.md index 371b4149b..75a773400 100644 --- a/src/content/community/docs-contributors.md +++ b/src/content/community/docs-contributors.md @@ -11,7 +11,7 @@ React ドキュメントは [React チーム](/community/team)および[外部 ## Content {/*content*/} * [Rachel Nabors](https://twitter.com/RachelNabors): editing, writing, illustrating -* [Dan Abramov](https://twitter.com/dan_abramov): writing, curriculum design +* [Dan Abramov](https://bsky.app/profile/danabra.mov): writing, curriculum design * [Sylwia Vargas](https://twitter.com/SylwiaVargas): example code * [Rick Hanlon](https://twitter.com/rickhanlonii): writing * [David McCabe](https://twitter.com/mcc_abe): writing @@ -34,7 +34,7 @@ React ドキュメントは [React チーム](/community/team)および[外部 * [Jared Palmer](https://twitter.com/jaredpalmer): site development * [ThisDotLabs](https://www.thisdot.co/) ([Dane Grant](https://twitter.com/danecando), [Dustin Goodman](https://twitter.com/dustinsgoodman)): site development * [CodeSandbox](https://codesandbox.io/) ([Ives van Hoorne](https://twitter.com/CompuIves), [Alex Moldovan](https://twitter.com/alexnmoldovan), [Jasper De Moor](https://twitter.com/JasperDeMoor), [Danilo Woznica](https://twitter.com/danilowoz)): sandbox integration -* [Dan Abramov](https://twitter.com/dan_abramov): site development +* [Dan Abramov](https://bsky.app/profile/danabra.mov): site development * [Rick Hanlon](https://twitter.com/rickhanlonii): site development * [Harish Kumar](https://www.strek.in/): development and maintenance * [Luna Ruan](https://twitter.com/lunaruan): sandbox improvements diff --git a/src/content/community/meetups.md b/src/content/community/meetups.md index 544b2a1d7..43b50b3d7 100644 --- a/src/content/community/meetups.md +++ b/src/content/community/meetups.md @@ -57,6 +57,9 @@ title: React ミーティング * [React Advanced London](https://guild.host/react-advanced-london) * [React Native London](https://guild.host/RNLDN) +## Finland {/*finland*/} +* [Helsinki](https://www.meetabit.com/communities/react-helsinki) + ## France {/*france*/} * [Lille](https://www.meetup.com/ReactBeerLille/) * [Paris](https://www.meetup.com/ReactJS-Paris/) @@ -136,6 +139,9 @@ title: React ミーティング ## Spain {/*spain*/} * [Barcelona](https://www.meetup.com/ReactJS-Barcelona/) +## Sri Lanka {/*sri-lanka*/} +* [Colombo](https://www.javascriptcolombo.com/) + ## Sweden {/*sweden*/} * [Goteborg](https://www.meetup.com/ReactJS-Goteborg/) * [Stockholm](https://www.meetup.com/Stockholm-ReactJS-Meetup/) diff --git a/src/content/community/team.md b/src/content/community/team.md index 05c528721..ee818f71a 100644 --- a/src/content/community/team.md +++ b/src/content/community/team.md @@ -22,8 +22,17 @@ React コアチームのメンバーは、コアコンポーネントの API、R Dan は Microsoft PowerPoint の中に偶然 Visual Basic を発見したことからプログラミングを始めました。[Sebastian](#sebastian-markbåge) のツイートを長文のブログ投稿に翻訳することが真の使命であると感じています。Fortnite では、ゲームが終わるまで茂みの中に隠れて勝利することがあります。 +<<<<<<< HEAD Eli のプログラミング経験は、ハッキングで中学校を停学処分になったことで始まりました。2017 年から React と React Native の開発に携わっています。お菓子を食べるのが好きで、特にアイスクリームとアップルパイがお気に入りです。Eli はよくパルクールや室内スカイダイビング、エアリアルシルクなど、風変わりな活動を試しています。 +======= + + Eli got into programming after he got suspended from middle school for hacking. He has been working on React and React Native since 2017. He enjoys eating treats, especially ice cream and apple pie. You can find Eli trying quirky activities like parkour, indoor skydiving, and aerial silks. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 + + + + Hendrik’s journey in tech started in the late 90s when he built his first websites with Netscape Communicator. After earning a diploma in computer science and working at digital agencies, he built a React Server Components bundler and library, paving the way to his role on the Next.js team. Outside of work, he enjoys cycling and tinkering in his workshop. @@ -38,6 +47,10 @@ React コアチームのメンバーは、コアコンポーネントの API、R Joe は数学と哲学を専攻する予定でしたが、Matlab で物理シミュレーションを書いたことからコンピュータサイエンスに興味を持ちました。React に取り組む前は、Relay、RSocket.js、Skip プログラミング言語などに取り組んでいました。何かしらのリアクティブシステムを構築する傍らでは、ランニングをしたり、日本語を勉強したり、家族と過ごしたりしています。 + + Jordan started coding by building iPhone apps, where he was pushing and popping view controllers before he knew that for-loops were a thing. He enjoys working on technology that developers love, which naturally drew him to React. Outside of work he enjoys reading, kiteboarding, and playing guitar. + + Josh は大学で数学を専攻し、そこでプログラミングに出会いました。プロ開発者としての最初の仕事は、リアクティブプログラミングのお手本たる Microsoft Excel で保険料計算プログラムを書くことであり、きっとそれが今 React に取り組んでいる理由なのでしょう。その間 Josh はいくつかのスタートアップで IC、マネージャー、エグゼクティブも務めてきました。仕事以外では、料理で自分の限界に挑戦することが好きです。 @@ -46,20 +59,32 @@ React コアチームのメンバーは、コアコンポーネントの API、R Lauren のプログラミングキャリアは `` タグを初めて見たときにピークを迎えました。それ以来、彼女はその時の高揚感を追い続けています。大学ではコンピュータサイエンスではなく経済学を学んでいたため、コーディングは Excel で学びました。Lauren はチャットでお茶目なミームを投下したり、パートナとゲームを楽しんだり、韓国語を学んだり、犬の Zelda を可愛がったりするのが好きです。 +<<<<<<< HEAD Luna は 6 歳のときに父親から Python の基礎を学びました。それ以来、彼女を止めることは誰にもできません。典型的な Z 世代であらんと熱望する彼女のサクセスロードを形作るのは、環境保護活動、都会でのガーデニング、そして Voo-Doo'd(写真)と過ごす貴重な時間です。 +======= +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 Matt は偶然コーディングに出会い、独りでは作り出せないようなものをコミュニティで作ることに夢中になりました。React に参加する前は、YouTube、Google アシスタント、Fuchsia、Google Cloud AI、そして Evernote に取り組んでいました。開発者ツールの改善を行う傍らで、山を楽しんだり、ジャズを聴いたり、家族と時間を過ごしたりしています。 + + Mike went to grad school dreaming of becoming a professor but realized that he liked building things a lot more than writing grant applications. Mike joined Meta to work on Javascript infrastructure, which ultimately led him to work on the React Compiler. When not hacking on either Javascript or OCaml, Mike can often be found hiking or skiing in the Pacific Northwest. + + Mofei はゲームでチートを行うのに役立つと気づいたことでプログラミングを始めました。彼女は学部・大学院ではオペレーティングシステムを専門にしていましたが、今では React いじりを楽しんでいます。仕事の外では、ボルダリングの問題をデバッグすることや、次回のバックパック旅行の計画を楽しんでいます。 +<<<<<<< HEAD Noah の UI プログラミングに対する興味に火が付いたのはニューヨーク大で音楽技術を学んでいる時でした。Meta では内部ツール、ブラウザ、ウェブパフォーマンスに関する業務を行い、現在は React に注力しています。仕事以外では、シンセサイザーをいじったり、猫と過ごしたりしています。 +======= + + Pieter studied building science but after failing to get a job he made himself a website and things escalated from there. At Meta, he enjoys working on performance, languages and now React. When he's not programming you can find him off-road in the mountains. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -70,10 +95,13 @@ React コアチームのメンバーは、コアコンポーネントの API、R Ruslan の UI プログラミングの経験は、子供のころにゲーム掲示板で HTML テンプレートを手でカスタマイズしたのが最初でした。その後いろいろあってコンピュータサイエンスを専攻することとなりました。好きなものは音楽、ゲーム、ネットミームです。特にネットミームです。 +<<<<<<< HEAD Sathya は学校ではドラゴン本(コンパイラの教科書)が大嫌いだったにも関わらず、どういうわけかキャリアを通じてコンパイラに取り組むことになりました。React コンポーネントをコンパイルしていないときは、コーヒーを飲んでいるかひたすらドーサを食べているかのどちらかです。 +======= +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 Sebastian の専攻は心理学でした。普段の彼はもの静かです。彼が何かを言ったとしても、数か月後まで他の人には理解できないことがよくあります。彼の姓の発音は本来 "mark-boa-geh" ですが、実用性を優先して "mark-beige" に落ち着きました。彼の React へのアプローチも実用主義的です。 @@ -90,10 +118,13 @@ React コアチームのメンバーは、コアコンポーネントの API、R Sophie は React がリリースされてから 4 日後、当時のプロジェクトを全部 React を使って書き直しました(今思えば少々無謀だったかもしれません)。彼女がプロジェクトのナンバーワンコミッタになった後、ほかの全員が Facebook から給料をもらっているのに自分だけがもらっていないのはなぜかと思い、成長期の React を主導するために正式にチームに参加しました。その仕事は数年前に辞めているのですが、なぜかまだチームのグループチャットで「価値を提供」しています。 +<<<<<<< HEAD Tianyu は、子供の頃からゲームが大好きだったことでコンピュータに興味を持ちました。その後、コンピュータサイエンスを専攻し、今でも League of Legends のような子供っぽいゲームを楽しんでいます。コンピュータの前にいないときは、2 匹の子猫と遊んだり、ハイキングやカヤックを楽しんだりしています。 +======= +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 Yuzhi は学校でコンピュータサイエンスを学びました。彼女は、実際に研究室に行かなくてもコードが生き生きと動く瞬間の喜びが好きでした。現在の彼女は React org のマネージャです。その前は、Relay のデータフェッチングフレームワークに取り組んでいました。余暇には、ガーデニングや家のリフォームを通じた生活の最適化にいそしんでいます。 diff --git a/src/content/community/versioning-policy.md b/src/content/community/versioning-policy.md index af504c019..80689422c 100644 --- a/src/content/community/versioning-policy.md +++ b/src/content/community/versioning-policy.md @@ -8,7 +8,11 @@ React のすべての安定版ビルドは広範なテストに通過してお +<<<<<<< HEAD 過去のリリースの一覧は [Versions](/versions) ページをご覧ください。 +======= +This versioning policy describes our approach to version numbers for packages such as `react` and `react-dom`. For a list of previous releases, see the [Versions](/versions) page. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ## 安定版リリース {/*stable-releases*/} @@ -24,7 +28,13 @@ React のすべての安定版ビルドは広範なテストに通過してお 最も一般的なタイプのリリースはマイナーリリースです。 +<<<<<<< HEAD ### 破壊的な変更 {/*breaking-changes*/} +======= +We know our users continue to use old versions of React in production. If we learn of a security vulnerability in React, we release a backported fix for all major versions that are affected by the vulnerability. + +### Breaking changes {/*breaking-changes*/} +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 破壊的な変更は誰にとっても煩わしいため、メジャーリリースの数は最小限に抑えるようにしています。例えば、React 15 は 2016 年 4 月にリリースされ、React 16 は 2017 年 9 月にリリースされ、React 17 は 2020 年 10 月にリリースされました。 diff --git a/src/content/learn/add-react-to-an-existing-project.md b/src/content/learn/add-react-to-an-existing-project.md index 57fdc507d..413420dc3 100644 --- a/src/content/learn/add-react-to-an-existing-project.md +++ b/src/content/learn/add-react-to-an-existing-project.md @@ -20,9 +20,15 @@ title: 既存プロジェクトに React を追加する 以下の手順に従って設定することをお勧めします。 +<<<<<<< HEAD 1. [React ベースのフレームワーク](/learn/start-a-new-react-project)のうちひとつを使い、アプリの **React 部分をビルド**します。 2. フレームワークの設定で `/some-app` を ***base path* に指定**します(方法:[Next.js](https://nextjs.org/docs/api-reference/next.config.js/basepath)、[Gatsby](https://www.gatsbyjs.com/docs/how-to/previews-deploys-hosting/path-prefix/))。 3. **サーバーまたはプロキシを設定**して、`/some-app/` 以下のすべてのリクエストを React アプリで処理するようにします。 +======= +1. **Build the React part of your app** using one of the [React-based frameworks](/learn/start-a-new-react-project). +2. **Specify `/some-app` as the *base path*** in your framework's configuration (here's how: [Next.js](https://nextjs.org/docs/app/api-reference/config/next-config-js/basePath), [Gatsby](https://www.gatsbyjs.com/docs/how-to/previews-deploys-hosting/path-prefix/)). +3. **Configure your server or a proxy** so that all requests under `/some-app/` are handled by your React app. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 こうすることで、アプリの React 部分がこれらのフレームワークに組み込まれた[ベストプラクティスを最大限に取り入れる](/learn/start-a-new-react-project#can-i-use-react-without-a-framework)ことができます。 @@ -45,7 +51,11 @@ title: 既存プロジェクトに React を追加する * **アプリが既に `import` 文を使ってファイル分割するよう設定されている場合**、その既存の設定を使用するようにしてみてください。JS コードで `
      ` と記述すると、構文エラーが発生するかどうかを確認してください。構文エラーが発生する場合は、[Babel を使用して JavaScript を変換](https://babeljs.io/setup)するようにし、JSX を使うために [Babel React プリセット](https://babeljs.io/docs/babel-preset-react) を有効にしてください。 +<<<<<<< HEAD * **JavaScript モジュールをコンパイルする既存のセットアップがない場合**は、[Vite](https://vitejs.dev/) を使ってセットアップします。Vite コミュニティは、Rails、Django、Laravel をはじめ、[多くのバックエンドフレームワークとのインテグレーション](https://github.com/vitejs/awesome-vite#integrations-with-backends)をメンテナンスしています。あなたのバックエンドフレームワークがリストされていない場合は、[このガイドに従って](https://vitejs.dev/guide/backend-integration.html)手動で Vite ビルドをバックエンドと統合してください。 +======= +* **If your app doesn't have an existing setup for compiling JavaScript modules,** set it up with [Vite](https://vite.dev/). The Vite community maintains [many integrations with backend frameworks](https://github.com/vitejs/awesome-vite#integrations-with-backends), including Rails, Django, and Laravel. If your backend framework is not listed, [follow this guide](https://vite.dev/guide/backend-integration.html) to manually integrate Vite builds with your backend. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 セットアップがうまくいっているかどうかを確認するには、プロジェクトフォルダーで次のコマンドを実行します。 @@ -57,12 +67,13 @@ npm install react react-dom -```html index.html hidden +```html public/index.html hidden My app +
      ``` @@ -84,7 +95,11 @@ root.render(

      Hello, world

      ); +<<<<<<< HEAD 既存のプロジェクトにモジュラーな JavaScript 環境を組み込むことを最初は不安に感じるかもしれませんが、その価値はあると思います! 行き詰まったら、[コミュニティのリソース](/community)または [Vite Chat](https://chat.vitejs.dev/) を試してみてください。 +======= +Integrating a modular JavaScript environment into an existing project for the first time can feel intimidating, but it's worth it! If you get stuck, try our [community resources](/community) or the [Vite Chat](https://chat.vite.dev/). +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -119,7 +134,7 @@ root.render(

      Hello, world

      ); -```html index.html +```html public/index.html My app diff --git a/src/content/learn/build-a-react-app-from-scratch.md b/src/content/learn/build-a-react-app-from-scratch.md new file mode 100644 index 000000000..e5b396c7e --- /dev/null +++ b/src/content/learn/build-a-react-app-from-scratch.md @@ -0,0 +1,143 @@ +--- +title: Build a React app from Scratch +--- + + + +If your app has constraints not well-served by existing frameworks, you prefer to build your own framework, or you just want to learn the basics of a React app, you can build a React app from scratch. + + + + + +#### Consider using a framework {/*consider-using-a-framework*/} + +Starting from scratch is an easy way to get started using React, but a major tradeoff to be aware of is that going this route is often the same as building your own adhoc framework. As your requirements evolve, you may need to solve more framework-like problems that our recommended frameworks already have well developed and supported solutions for. + +For example, if in the future your app needs support for server-side rendering (SSR), static site generation (SSG), and/or React Server Components (RSC), you will have to implement those on your own. Similarly, future React features that require integrating at the framework level will have to be implemented on your own if you want to use them. + +Our recommended frameworks also help you build better performing apps. For example, reducing or eliminating waterfalls from network requests makes for a better user experience. This might not be a high priority when you are building a toy project, but if your app gains users you may want to improve its performance. + +Going this route also makes it more difficult to get support, since the way you develop routing, data-fetching, and other features will be unique to your situation. You should only choose this option if you are comfortable tackling these problems on your own, or if you’re confident that you will never need these features. + +For a list of recommended frameworks, check out [Creating a React App](/learn/creating-a-react-app). + + + + +## Step 1: Install a build tool {/*step-1-install-a-build-tool*/} + +The first step is to install a build tool like `vite`, `parcel`, or `rsbuild`. These build tools provide features to package and run source code, provide a development server for local development and a build command to deploy your app to a production server. + +### Vite {/*vite*/} + +[Vite](https://vite.dev/) is a build tool that aims to provide a faster and leaner development experience for modern web projects. + + +{`npm create vite@latest my-app -- --template react`} + + +Vite is opinionated and comes with sensible defaults out of the box. Vite has a rich ecosystem of plugins to support fast refresh, JSX, Babel/SWC, and other common features. See Vite's [React plugin](https://vite.dev/plugins/#vitejs-plugin-react) or [React SWC plugin](https://vite.dev/plugins/#vitejs-plugin-react-swc) and [React SSR example project](https://vite.dev/guide/ssr.html#example-projects) to get started. + +Vite is already being used as a build tool in one of our [recommended frameworks](/learn/creating-a-react-app): [React Router](https://reactrouter.com/start/framework/installation). + +### Parcel {/*parcel*/} + +[Parcel](https://parceljs.org/) combines a great out-of-the-box development experience with a scalable architecture that can take your project from just getting started to massive production applications. + + +{`npm install --save-dev parcel`} + + +Parcel supports fast refresh, JSX, TypeScript, Flow, and styling out of the box. See [Parcel's React recipe](https://parceljs.org/recipes/react/#getting-started) to get started. + +### Rsbuild {/*rsbuild*/} + +[Rsbuild](https://rsbuild.dev/) is an Rspack-powered build tool that provides a seamless development experience for React applications. It comes with carefully tuned defaults and performance optimizations ready to use. + + +{`npx create-rsbuild --template react`} + + +Rsbuild includes built-in support for React features like fast refresh, JSX, TypeScript, and styling. See [Rsbuild's React guide](https://rsbuild.dev/guide/framework/react) to get started. + + + +#### Metro for React Native {/*react-native*/} + +If you'd you're starting from scratch with React Native you'll need to use [Metro](https://metrobundler.dev/), the JavaScript bundler for React Native. Metro supports bundling for platforms like iOS and Android, but lacks many features when compared to the tools here. We recommend starting with Vite, Parcel, or Rsbuild unless your project requires React Native support. + + + +## Step 2: Build Common Application Patterns {/*step-2-build-common-application-patterns*/} + +The build tools listed above start off with a client-only, single-page app (SPA), but don't include any further solutions for common functionality like routing, data fetching, or styling. + +The React ecosystem includes many tools for these problems. We've listed a few that are widely used as a starting point, but feel free to choose other tools if those work better for you. + +### Routing {/*routing*/} + +Routing determines what content or pages to display when a user visits a particular URL. You need to set up a router to map URLs to different parts of your app. You'll also need to handle nested routes, route parameters, and query parameters. Routers can be configured within your code, or defined based on your component folder and file structures. + +Routers are a core part of modern applications, and are usually integrated with data fetching (including prefetching data for a whole page for faster loading), code splitting (to minimize client bundle sizes), and page rendering approaches (to decide how each page gets generated). + +We suggest using: + +- [React Router](https://reactrouter.com/start/framework/custom) +- [Tanstack Router](https://tanstack.com/router/latest) + + +### Data Fetching {/*data-fetching*/} + +Fetching data from a server or other data source is a key part of most applications. Doing this properly requires handling loading states, error states, and caching the fetched data, which can be complex. + +Purpose-built data fetching libraries do the hard work of fetching and caching the data for you, letting you focus on what data your app needs and how to display it. These libraries are typically used directly in your components, but can also be integrated into routing loaders for faster pre-fetching and better performance, and in server rendering as well. + +Note that fetching data directly in components can lead to slower loading times due to network request waterfalls, so we recommend prefetching data in router loaders or on the server as much as possible! This allows a page's data to be fetched all at once as the page is being displayed. + +If you're fetching data from most backends or REST-style APIs, we suggest using: + +- [React Query](https://react-query.tanstack.com/) +- [SWR](https://swr.vercel.app/) +- [RTK Query](https://redux-toolkit.js.org/rtk-query/overview) + +If you're fetching data from a GraphQL API, we suggest using: + +- [Apollo](https://www.apollographql.com/docs/react) +- [Relay](https://relay.dev/) + + +### Code-splitting {/*code-splitting*/} + +Code-splitting is the process of breaking your app into smaller bundles that can be loaded on demand. An app's code size increases with every new feature and additional dependency. Apps can become slow to load because all of the code for the entire app needs to be sent before it can be used. Caching, reducing features/dependencies, and moving some code to run on the server can help mitigate slow loading but are incomplete solutions that can sacrifice functionality if overused. + +Similarly, if you rely on the apps using your framework to split the code, you might encounter situations where loading becomes slower than if no code splitting were happening at all. For example, [lazily loading](/reference/react/lazy) a chart delays sending the code needed to render the chart, splitting the chart code from the rest of the app. [Parcel supports code splitting with React.lazy](https://parceljs.org/recipes/react/#code-splitting). However, if the chart loads its data *after* it has been initially rendered you are now waiting twice. This is a waterfall: rather than fetching the data for the chart and sending the code to render it simultaneously, you must wait for each step to complete one after the other. + +Splitting code by route, when integrated with bundling and data fetching, can reduce the initial load time of your app and the time it takes for the largest visible content of the app to render ([Largest Contentful Paint](https://web.dev/articles/lcp)). + +For code-splitting instructions, see your build tool docs: +- [Vite build optimizations](https://v3.vitejs.dev/guide/features.html#build-optimizations) +- [Parcel code splitting](https://parceljs.org/features/code-splitting/) +- [Rsbuild code splitting](https://rsbuild.dev/guide/optimization/code-splitting) + +### Improving Application Performance {/*improving-application-performance*/} + +Since the build tool you select only support single page apps (SPAs) you'll need to implement other [rendering patterns](https://www.patterns.dev/vanilla/rendering-patterns) like server-side rendering (SSR), static site generation (SSG), and/or React Server Components (RSC). Even if you don't need these features at first, in the future there may be some routes that would benefit SSR, SSG or RSC. + +* **Single-page apps (SPA)** load a single HTML page and dynamically updates the page as the user interacts with the app. SPAs are easier to get started with, but they can have slower initial load times. SPAs are the default architecture for most build tools. + +* **Streaming Server-side rendering (SSR)** renders a page on the server and sends the fully rendered page to the client. SSR can improve performance, but it can be more complex to set up and maintain than a single-page app. With the addition of streaming, SSR can be very complex to set up and maintain. See [Vite's SSR guide]( https://vite.dev/guide/ssr). + +* **Static site generation (SSG)** generates static HTML files for your app at build time. SSG can improve performance, but it can be more complex to set up and maintain than server-side rendering. See [Vite's SSG guide](https://vite.dev/guide/ssr.html#pre-rendering-ssg). + +* **React Server Components (RSC)** lets you mix build-time, server-only, and interactive components in a single React tree. RSC can improve performance, but it currently requires deep expertise to set up and maintain. See [Parcel's RSC examples](https://github.com/parcel-bundler/rsc-examples). + +Your rendering strategies need to integrate with your router so apps built with your framework can choose the rendering strategy on a per-route level. This will enable different rendering strategies without having to rewrite your whole app. For example, the landing page for your app might benefit from being statically generated (SSG), while a page with a content feed might perform best with server-side rendering. + +Using the right rendering strategy for the right routes can decrease the time it takes for the first byte of content to be loaded ([Time to First Byte](https://web.dev/articles/ttfb)), the first piece of content to render ([First Contentful Paint](https://web.dev/articles/fcp)), and the largest visible content of the app to render ([Largest Contentful Paint](https://web.dev/articles/lcp)). + +### And more... {/*and-more*/} + +These are just a few examples of the features a new app will need to consider when building from scratch. Many limitations you'll hit can be difficult to solve as each problem is interconnected with the others and can require deep expertise in problem areas you may not be familiar with. + +If you don't want to solve these problems on your own, you can [get started with a framework](/learn/creating-a-react-app) that provides these features out of the box. diff --git a/src/content/learn/creating-a-react-app.md b/src/content/learn/creating-a-react-app.md new file mode 100644 index 000000000..fc5019ece --- /dev/null +++ b/src/content/learn/creating-a-react-app.md @@ -0,0 +1,113 @@ +--- +title: Creating a React App +--- + + + +If you want to build a new app or website with React, we recommend starting with a framework. + + + +If your app has constraints not well-served by existing frameworks, you prefer to build your own framework, or you just want to learn the basics of a React app, you can [build a React app from scratch](/learn/build-a-react-app-from-scratch). + +## Full-stack frameworks {/*full-stack-frameworks*/} + +These recommended frameworks support all the features you need to deploy and scale your app in production. They have integrated the latest React features and take advantage of React’s architecture. + + + +#### Full-stack frameworks do not require a server. {/*react-frameworks-do-not-require-a-server*/} + +All the frameworks on this page support client-side rendering ([CSR](https://developer.mozilla.org/en-US/docs/Glossary/CSR)), single-page apps ([SPA](https://developer.mozilla.org/en-US/docs/Glossary/SPA)), and static-site generation ([SSG](https://developer.mozilla.org/en-US/docs/Glossary/SSG)). These apps can be deployed to a [CDN](https://developer.mozilla.org/en-US/docs/Glossary/CDN) or static hosting service without a server. Additionally, these frameworks allow you to add server-side rendering on a per-route basis, when it makes sense for your use case. + +This allows you to start with a client-only app, and if your needs change later, you can opt-in to using server features on individual routes without rewriting your app. See your framework's documentation for configuring the rendering strategy. + + + +### Next.js (App Router) {/*nextjs-app-router*/} + +**[Next.js's App Router](https://nextjs.org/docs) is a React framework that takes full advantage of React's architecture to enable full-stack React apps.** + + +npx create-next-app@latest + + +Next.js is maintained by [Vercel](https://vercel.com/). You can [deploy a Next.js app](https://nextjs.org/docs/app/building-your-application/deploying) to any Node.js or serverless hosting, or to your own server. Next.js also supports [static export](https://nextjs.org/docs/app/building-your-application/deploying/static-exports) which doesn't require a server. Vercel additionally provides opt-in paid cloud services. + +### React Router (v7) {/*react-router-v7*/} + +**[React Router](https://reactrouter.com/start/framework/installation) is the most popular routing library for React and can be paired with Vite to create a full-stack React framework**. It emphasizes standard Web APIs and has several [ready to deploy templates](https://github.com/remix-run/react-router-templates) for various JavaScript runtimes and platforms. + +To create a new React Router framework project, run: + + +npx create-react-router@latest + + +React Router is maintained by [Shopify](https://www.shopify.com). + +### Expo (for native apps) {/*expo*/} + +**[Expo](https://expo.dev/) is a React framework that lets you create universal Android, iOS, and web apps with truly native UIs.** It provides an SDK for [React Native](https://reactnative.dev/) that makes the native parts easier to use. To create a new Expo project, run: + + +npx create-expo-app@latest + + +If you're new to Expo, check out the [Expo tutorial](https://docs.expo.dev/tutorial/introduction/). + +Expo is maintained by [Expo (the company)](https://expo.dev/about). Building apps with Expo is free, and you can submit them to the Google and Apple app stores without restrictions. Expo additionally provides opt-in paid cloud services. + + +## Other frameworks {/*other-frameworks*/} + +There are other up-and-coming frameworks that are working towards our full stack React vision: + +- [TanStack Start (Beta)](https://tanstack.com/): TanStack Start is a full-stack React framework powered by TanStack Router. It provides a full-document SSR, streaming, server functions, bundling, and more using tools like Nitro and Vite. +- [RedwoodJS](https://redwoodjs.com/): Redwood is a full stack React framework with lots of pre-installed packages and configuration that makes it easy to build full-stack web applications. + + + +#### Which features make up the React team’s full-stack architecture vision? {/*which-features-make-up-the-react-teams-full-stack-architecture-vision*/} + +Next.js's App Router bundler fully implements the official [React Server Components specification](https://github.com/reactjs/rfcs/blob/main/text/0188-server-components.md). This lets you mix build-time, server-only, and interactive components in a single React tree. + +For example, you can write a server-only React component as an `async` function that reads from a database or from a file. Then you can pass data down from it to your interactive components: + +```js +// This component runs *only* on the server (or during the build). +async function Talks({ confId }) { + // 1. You're on the server, so you can talk to your data layer. API endpoint not required. + const talks = await db.Talks.findAll({ confId }); + + // 2. Add any amount of rendering logic. It won't make your JavaScript bundle larger. + const videos = talks.map(talk => talk.video); + + // 3. Pass the data down to the components that will run in the browser. + return ; +} +``` + +Next.js's App Router also integrates [data fetching with Suspense](/blog/2022/03/29/react-v18#suspense-in-data-frameworks). This lets you specify a loading state (like a skeleton placeholder) for different parts of your user interface directly in your React tree: + +```js +}> + + +``` + +Server Components and Suspense are React features rather than Next.js features. However, adopting them at the framework level requires buy-in and non-trivial implementation work. At the moment, the Next.js App Router is the most complete implementation. The React team is working with bundler developers to make these features easier to implement in the next generation of frameworks. + + + +## Start From Scratch {/*start-from-scratch*/} + +If your app has constraints not well-served by existing frameworks, you prefer to build your own framework, or you just want to learn the basics of a React app, there are other options available for starting a React project from scratch. + +Starting from scratch gives you more flexibility, but does require that you make choices on which tools to use for routing, data fetching, and other common usage patterns. It's a lot like building your own framework, instead of using a framework that already exists. The [frameworks we recommend](#recommended-react-frameworks) have built-in solutions for these problems. + +If you want to build your own solutions, see our guide to [build a React app from Scratch](/learn/build-a-react-app-from-scratch) for instructions on how to set up a new React project starting with a built tool like [Vite](https://vite.dev/), [Parcel](https://parceljs.org/), or [RSbuild](https://rsbuild.dev/). + +----- + +_If you’re a framework author interested in being included on this page, [please let us know](https://github.com/reactjs/react.dev/issues/new?assignees=&labels=type%3A+framework&projects=&template=3-framework.yml&title=%5BFramework%5D%3A+)._ \ No newline at end of file diff --git a/src/content/learn/installation.md b/src/content/learn/installation.md index dc77e377e..0d507e701 100644 --- a/src/content/learn/installation.md +++ b/src/content/learn/installation.md @@ -8,6 +8,7 @@ React は当初より、段階的に導入できるように設計されてい +<<<<<<< HEAD * [新しい React プロジェクトを始める方法](/learn/start-a-new-react-project) @@ -18,6 +19,9 @@ React は当初より、段階的に導入できるように設計されてい ## React を試してみる {/*try-react*/} +======= +## Try React {/*try-react*/} +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 React を試すために何かをインストールする必要はありません。このサンドボックスを編集してみてください! @@ -39,6 +43,7 @@ export default function App() { React ドキュメントのほとんどのページには、このようなサンドボックスが含まれています。React のドキュメント外にも、React をサポートするオンラインサンドボックスがたくさんあります。例えば、[CodeSandbox](https://codesandbox.io/s/new)、[StackBlitz](https://stackblitz.com/fork/react) や [CodePen](https://codepen.io/pen?template=QWYVwWN) が挙げられます。 +<<<<<<< HEAD ### ローカルで React を試す {/*try-react-locally*/} あなたのコンピュータのローカル環境で React を試すには、[この HTML ページをダウンロードしてください](https://gist.githubusercontent.com/gaearon/0275b1e1518599bbeafcde4722e79ed1/raw/db72dcbf3384ee1708c4a07d3be79860db04bff0/example.html)。そしてエディタとブラウザで開いてください! @@ -46,10 +51,34 @@ React ドキュメントのほとんどのページには、このようなサ ## 新しい React プロジェクトを開始する {/*start-a-new-react-project*/} アプリやウェブサイトを React でフルに構築したい場合は、[新しい React プロジェクトを始めましょう](/learn/start-a-new-react-project)。 +======= +To try React locally on your computer, [download this HTML page.](https://gist.githubusercontent.com/gaearon/0275b1e1518599bbeafcde4722e79ed1/raw/db72dcbf3384ee1708c4a07d3be79860db04bff0/example.html) Open it in your editor and in your browser! + +## Creating a React App {/*creating-a-react-app*/} + +If you want to start a new React app, you can [create a React app](/learn/creating-a-react-app) using a recommended framework. + +## Build a React App from Scratch {/*build-a-react-app-from-scratch*/} + +If a framework is not a good fit for your project, you prefer to build your own framework, or you just want to learn the basics of a React app you can [build a React app from scratch](/learn/build-a-react-app-from-scratch). +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ## 既存のプロジェクトに React を追加する {/*add-react-to-an-existing-project*/} +<<<<<<< HEAD 既存のアプリやウェブサイトで React を試してみたい場合は、[既存のプロジェクトに React を追加してください](/learn/add-react-to-an-existing-project)。 +======= +If want to try using React in your existing app or a website, you can [add React to an existing project.](/learn/add-react-to-an-existing-project) + + + + +#### Should I use Create React App? {/*should-i-use-create-react-app*/} + +No. Create React App has been deprecated. For more information, see [Sunsetting Create React App](/blog/2025/02/14/sunsetting-create-react-app). + + +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ## 次のステップ {/*next-steps*/} diff --git a/src/content/learn/manipulating-the-dom-with-refs.md b/src/content/learn/manipulating-the-dom-with-refs.md index 53535f956..4f6d68e23 100644 --- a/src/content/learn/manipulating-the-dom-with-refs.md +++ b/src/content/learn/manipulating-the-dom-with-refs.md @@ -644,12 +644,21 @@ DOM 要素を手動で削除した後、`setState` を使用して再度表示 +<<<<<<< HEAD - ref は一般的な概念だが、ほとんどの場合、DOM 要素を保持するために使用する。 - `
      ` のように渡すことで、React に DOM ノードを `myRef.current` に入れるよう指示する。 - 通常、フォーカス、スクロール、または DOM 要素の測定などの非破壊的なアクションに ref を使用する。 - コンポーネントはデフォルトでは内部の DOM ノードを公開しない。`forwardRef` を使用して特定のノードに 2 番目の `ref` 引数を渡すことで、DOM ノードの公開を明示的に許可する。 - React によって管理される DOM ノードの変更を避ける。 - React によって管理される DOM ノードをどうしても変更する場合は、React が更新する理由のない部分のみ変更する。 +======= +- Refs are a generic concept, but most often you'll use them to hold DOM elements. +- You instruct React to put a DOM node into `myRef.current` by passing `
      `. +- Usually, you will use refs for non-destructive actions like focusing, scrolling, or measuring DOM elements. +- A component doesn't expose its DOM nodes by default. You can opt into exposing a DOM node by using the `ref` prop. +- Avoid changing DOM nodes managed by React. +- If you do modify DOM nodes managed by React, modify parts that React has no reason to update. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -1049,7 +1058,11 @@ img { +<<<<<<< HEAD `SearchInput` のような独自コンポーネントから DOM ノードを公開するためには、`forwardRef` が必要です。 +======= +You'll need to pass `ref` as a prop to opt into exposing a DOM node from your own component like `SearchInput`. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -1134,18 +1147,14 @@ export default function SearchButton({ onClick }) { ``` ```js src/SearchInput.js -import { forwardRef } from 'react'; - -export default forwardRef( - function SearchInput(props, ref) { - return ( - - ); - } -); +export default function SearchInput({ ref }) { + return ( + + ); +} ``` ```css diff --git a/src/content/learn/passing-data-deeply-with-context.md b/src/content/learn/passing-data-deeply-with-context.md index d045771af..19055e465 100644 --- a/src/content/learn/passing-data-deeply-with-context.md +++ b/src/content/learn/passing-data-deeply-with-context.md @@ -468,15 +468,19 @@ import { LevelContext } from './LevelContext.js'; export default function Section({ level, children }) { return (
      - + {children} - +
      ); } ``` +<<<<<<< HEAD これにより、「この `
      ` の下にあるコンポーネントが `LevelContext` の値を要求した場合、この `level` を渡せ」と React に伝えていることになります。コンポーネントは、UI ツリー内の上側で、最も近い `` の値を使用します。 +======= +This tells React: "if any component inside this `
      ` asks for `LevelContext`, give them this `level`." The component will use the value of the nearest `` in the UI tree above it. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -514,9 +518,9 @@ import { LevelContext } from './LevelContext.js'; export default function Section({ level, children }) { return (
      - + {children} - +
      ); } @@ -566,9 +570,15 @@ export const LevelContext = createContext(1); 元のコードと見た目の結果は同じですが、`level` を props として個々の `Heading` コンポーネントに渡さずに済んでいます! 代わりに、見出しは最も近い `Section` に値を要求して、自分の見出しレベルを自分で「判断」しているのです。 +<<<<<<< HEAD 1. `
      ` に props として `level` を渡す。 2. `Section` は子要素を `` でラップする。 3. `Heading` は `useContext(LevelContext)` とすることで、上にある最も近い `LevelContext` の値を要求する。 +======= +1. You pass a `level` prop to the `
      `. +2. `Section` wraps its children into ``. +3. `Heading` asks the closest value of `LevelContext` above with `useContext(LevelContext)`. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ## 同一コンポーネントでコンテクストを使用しつつ提供 {/*using-and-providing-context-from-the-same-component*/} @@ -595,9 +605,9 @@ export default function Section({ children }) { const level = useContext(LevelContext); return (
      - + {children} - +
      ); } @@ -643,9 +653,9 @@ export default function Section({ children }) { const level = useContext(LevelContext); return (
      - + {children} - +
      ); } @@ -776,9 +786,9 @@ export default function Section({ children, isFancy }) { 'section ' + (isFancy ? 'fancy' : '') }> - + {children} - +
      ); } @@ -864,6 +874,7 @@ CSS では、`color` や `background-color` といった異なるプロパティ +<<<<<<< HEAD * コンテクストにより、コンポーネントがそれ以下のツリー全体に情報を提供できる。 * コンテクストを使うには: 1. `export const MyContext = createContext(defaultValue)` を使用して作成およびエクスポートする。 @@ -872,6 +883,16 @@ CSS では、`color` や `background-color` といった異なるプロパティ * コンテクストは中間コンポーネントを貫通する。 * コンテクストを使えば、「周囲に適応する」コンポーネントが書ける。 * コンテクストを使用する前に、props を渡すか、`children` として JSX を渡す方法を検討してみる。 +======= +* Context lets a component provide some information to the entire tree below it. +* To pass context: + 1. Create and export it with `export const MyContext = createContext(defaultValue)`. + 2. Pass it to the `useContext(MyContext)` Hook to read it in any child component, no matter how deep. + 3. Wrap children into `` to provide it from a parent. +* Context passes through any components in the middle. +* Context lets you write components that "adapt to their surroundings". +* Before you use context, try passing props or passing JSX as `children`. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -1022,7 +1043,11 @@ li { すべてのコンポーネントの props から `imageSize` を削除します。 +<<<<<<< HEAD `Context.js` で `ImageSizeContext` を作成してエクスポートします。次に、List を `` でラップすることで下に値を渡します。`PlaceImage` で `useContext(ImageSizeContext)` を使ってそれを読み取ります。 +======= +Create and export `ImageSizeContext` from `Context.js`. Then wrap the List into `` to pass the value down, and `useContext(ImageSizeContext)` to read it in the `PlaceImage`: +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -1036,7 +1061,7 @@ export default function App() { const [isLarge, setIsLarge] = useState(false); const imageSize = isLarge ? 150 : 100; return ( -
      -
      +
      ) } diff --git a/src/content/learn/react-compiler.md b/src/content/learn/react-compiler.md index d2b979b4d..c72815d29 100644 --- a/src/content/learn/react-compiler.md +++ b/src/content/learn/react-compiler.md @@ -311,7 +311,11 @@ export default defineConfig({ ### Webpack {/*usage-with-webpack*/} +<<<<<<< HEAD コミュニティによる Webpack ローダは[こちらで利用可能](https://github.com/SukkaW/react-compiler-webpack)です。 +======= +A community webpack loader is [now available here](https://github.com/SukkaW/react-compiler-webpack). +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ### Expo {/*usage-with-expo*/} diff --git a/src/content/learn/react-developer-tools.md b/src/content/learn/react-developer-tools.md index 5694d46f9..7d9f5189b 100644 --- a/src/content/learn/react-developer-tools.md +++ b/src/content/learn/react-developer-tools.md @@ -54,7 +54,11 @@ react-devtools ## モバイル (React Native) {/*mobile-react-native*/} +<<<<<<< HEAD [React Native](https://reactnative.dev/) で作成するアプリの調査を行う場合は、React Developer Tools と密に統合された組み込みデバッガである [React Native DevTools](https://reactnative.dev/docs/debugging/react-native-devtools) を使用できます。要素のハイライトや選択を含むすべての機能が、ブラウザ版の機能拡張と同様に動作します。 +======= +To inspect apps built with [React Native](https://reactnative.dev/), you can use [React Native DevTools](https://reactnative.dev/docs/react-native-devtools), the built-in debugger that deeply integrates React Developer Tools. All features work identically to the browser extension, including native element highlighting and selection. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 [React Native のデバッグについてさらに読む](https://reactnative.dev/docs/debugging) diff --git a/src/content/learn/render-and-commit.md b/src/content/learn/render-and-commit.md index ca43b9a62..5ca1aa864 100644 --- a/src/content/learn/render-and-commit.md +++ b/src/content/learn/render-and-commit.md @@ -70,9 +70,15 @@ export default function Image() { コンポーネントが最初にレンダーされた後、[`set` 関数](/reference/react/useState#setstate)を使って state を更新することで、さらなるレンダーをトリガすることができます。コンポーネントの state を更新すると、自動的にレンダーがキューイングされます。(これは、レストランの客が最初の注文の後に、喉の渇きや空腹の状態に応じてお茶やデザートなどいろいろなものを注文するようなものだと考えることができます。) +<<<<<<< HEAD +======= + + + +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ## ステップ 2:React がコンポーネントをレンダー {/*step-2-react-renders-your-components*/} @@ -84,7 +90,11 @@ export default function Image() { このプロセスは再帰的に発生します。更新されたコンポーネントが他のコンポーネントを返す場合、次に*その*コンポーネントを React がレンダーし、そのコンポーネントも何かコンポーネントを返す場合、*その*コンポーネントも次にレンダーし、といった具合に続きます。このプロセスは、ネストされたコンポーネントがなくなり、React が画面に表示されるべき内容を知り尽くすまで続きます。 +<<<<<<< HEAD 次の例では、React は `Gallery()` を呼び出した後、`Image()` を何度も呼び出します。 +======= +In the following example, React will call `Gallery()` and `Image()` several times: +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -148,10 +158,17 @@ img { margin: 0 10px 10px 0; } ## ステップ 3:React が DOM への変更をコミットする {/*step-3-react-commits-changes-to-the-dom*/} +<<<<<<< HEAD あなたのコンポーネントをレンダー(関数として呼び出し)した後、React は DOM を変更します。 * **初回レンダー時には**、React は [`appendChild()`](https://developer.mozilla.org/docs/Web/API/Node/appendChild) DOM API を使用して、作成したすべての DOM ノードを画面に表示します。 * **再レンダー時には**、React は最新のレンダー出力に合わせて DOM を変更するため、必要な最小限の操作(レンダー中に計算されたもの!)を適用します。 +======= +After rendering (calling) your components, React will modify the DOM. + +* **For the initial render,** React will use the [`appendChild()`](https://developer.mozilla.org/docs/Web/API/Node/appendChild) DOM API to put all the DOM nodes it has created on screen. +* **For re-renders,** React will apply the minimal necessary operations (calculated while rendering!) to make the DOM match the latest rendering output. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 **React はレンダー間で違いがあった場合にのみ DOM ノードを変更します**。例えば、以下のコンポーネントは親から渡された異なる props で毎秒再レンダーされます。実際に試してみてください。`` にテキストを追加して `value` を更新することができますが、コンポーネントが再レンダーされる瞬間もテキストが消えることはありません: diff --git a/src/content/learn/setup.md b/src/content/learn/setup.md new file mode 100644 index 000000000..2c46ee148 --- /dev/null +++ b/src/content/learn/setup.md @@ -0,0 +1,28 @@ +--- +title: Setup +--- + + +React integrates with tools like editors, TypeScript, browser extensions, and compilers. This section will help you get your environment set up. + + + +## Editor Setup {/*editor-setup*/} + +See our [recommended editors](/learn/editor-setup) and learn how to set them up to work with React. + +## Using TypeScript {/*using-typescript*/} + +TypeScript is a popular way to add type definitions to JavaScript codebases. [Learn how to integrate TypeScript into your React projects](/learn/typescript). + +## React Developer Tools {/*react-developer-tools*/} + +React Developer Tools is a browser extension that can inspect React components, edit props and state, and identify performance problems. Learn how to install it [here](learn/react-developer-tools). + +## React Compiler {/*react-compiler*/} + +React Compiler is a tool that automatically optimizes your React app. [Learn more](/learn/react-compiler). + +## Next steps {/*next-steps*/} + +Head to the [Quick Start](/learn) guide for a tour of the most important React concepts you will encounter every day. diff --git a/src/content/learn/state-a-components-memory.md b/src/content/learn/state-a-components-memory.md index 04e744704..2c6004f11 100644 --- a/src/content/learn/state-a-components-memory.md +++ b/src/content/learn/state-a-components-memory.md @@ -1452,7 +1452,11 @@ export default function FeedbackForm() { #### 不要な state を削除 {/*remove-unnecessary-state*/} +<<<<<<< HEAD この例では、ボタンがクリックされると、ユーザの名前を尋ねて、挨拶を表示するアラートが表示されるはずです。名前を保持するために state を使用しようとしましたが、何らかの理由で常に "Hello, !" と表示されます。 +======= +When the button is clicked, this example should ask for the user's name and then display an alert greeting them. You tried to use state to keep the name, but for some reason the first time it shows "Hello, !", and then "Hello, [name]!" with the previous input every time after. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 このコードを修正するには、不要な state 変数を削除してください([この問題が発生した理由](/learn/state-as-a-snapshot)については後で説明します)。 diff --git a/src/content/learn/tutorial-tic-tac-toe.md b/src/content/learn/tutorial-tic-tac-toe.md index 9c628bb70..1c40ff377 100644 --- a/src/content/learn/tutorial-tic-tac-toe.md +++ b/src/content/learn/tutorial-tic-tac-toe.md @@ -295,7 +295,11 @@ export default function Square() { } ``` +<<<<<<< HEAD _ブラウザ_ セクションには、以下のように X の入ったマス目が表示されているはずです。 +======= +The _browser_ section should be displaying a square with an X in it like this: +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ![X と書かれたマス目](../images/tutorial/x-filled-square.png) @@ -1325,7 +1329,11 @@ state 管理が `Board` コンポーネントに移動されたので、親で 1. `handleClick` は引数 `0` を使って、`squares` 配列の最初の要素を `null` から `X` に更新します。 1. `Board` コンポーネントの state である `squares` が更新されたので、`Board` とそのすべての子が再レンダーされます。これにより、インデックス `0` である `Square` コンポーネントの `value` プロパティが `null` から `X` に変更されます。 +<<<<<<< HEAD 最終的に、クリックによって左上のマス目が空白から `X` に変わったという結果をユーザが目にすることになります。 +======= +In the end the user sees that the upper left square has changed from empty to having an `X` after clicking it. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -1406,7 +1414,11 @@ export default function Board() { `X` が `O` で上書きされてしまっています! これでも大変興味深い特殊ルールにはなりそうですが、今のところはオリジナルのルールを守りましょう。 +<<<<<<< HEAD マス目に `X` や `O` を置く前に、まずそのマス目に既に `X` や `O` の値があるかどうか、まだチェックしていません。これは、*早期リターン (early return)* をすることで修正できます。マス目に既に `X` または `O` があるかどうかを確認し、既にある場合は `handleClick` 関数内から早期 `return` し、盤面の state が更新されてしまわないようにしましょう。 +======= +When you mark a square with an `X` or an `O` you aren't first checking to see if the square already has an `X` or `O` value. You can fix this by *returning early*. You'll check to see if the square already has an `X` or an `O`. If the square is already filled, you will `return` in the `handleClick` function early--before it tries to update the board state. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ```js {2,3,4} function handleClick(i) { @@ -1556,7 +1568,11 @@ function calculateWinner(squares) { +<<<<<<< HEAD `Board` コンポーネントの `handleClick` 関数で `calculateWinner(squares)` を呼び出して、いずれかのプレーヤが勝利したかどうか判定します。これは、ユーザがすでに `X` や `O` のあるマス目をクリックしたかどうかチェックしている場所と同じところで行えます。どちらの場合でも早期リターンを行いたいです。 +======= +You will call `calculateWinner(squares)` in the `Board` component's `handleClick` function to check if a player has won. You can perform this check at the same time you check if a user has clicked a square that already has an `X` or an `O`. We'd like to return early in both cases: +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ```js {2} function handleClick(i) { diff --git a/src/content/reference/react-dom/client/createRoot.md b/src/content/reference/react-dom/client/createRoot.md index e6f2c0774..edb471bdf 100644 --- a/src/content/reference/react-dom/client/createRoot.md +++ b/src/content/reference/react-dom/client/createRoot.md @@ -144,7 +144,7 @@ root.render(); -```html index.html +```html public/index.html My app @@ -344,6 +344,7 @@ export default function App({counter}) { `render` を複数回呼び出すことは滅多にありません。通常、コンポーネントは代わりに [state の更新](/reference/react/useState)を行います。 +<<<<<<< HEAD ### キャッチされないエラーに対するダイアログを表示 {/*show-a-dialog-for-uncaught-errors*/} デフォルトでは React は、キャッチされなかったエラーをコンソールにログとして表示します。独自のエラーレポーティングを実装するには、省略可能なルートオプションである `onUncaughtError` を指定します。 @@ -767,92 +768,32 @@ import { createRoot } from "react-dom/client"; import App from "./App.js"; import {reportCaughtError} from "./reportError"; import "./styles.css"; +======= +### Error logging in production {/*error-logging-in-production*/} + +By default, React will log all errors to the console. To implement your own error reporting, you can provide the optional error handler root options `onUncaughtError`, `onCaughtError` and `onRecoverableError`: + +```js [[1, 6, "onCaughtError"], [2, 6, "error", 1], [3, 6, "errorInfo"], [4, 10, "componentStack", 15]] +import { createRoot } from "react-dom/client"; +import { reportCaughtError } from "./reportError"; +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 const container = document.getElementById("root"); const root = createRoot(container, { onCaughtError: (error, errorInfo) => { - if (error.message !== 'Known error') { + if (error.message !== "Known error") { reportCaughtError({ - error, + error, componentStack: errorInfo.componentStack, }); } - } -}); -root.render(); -``` - -```js src/App.js -import { useState } from 'react'; -import { ErrorBoundary } from "react-error-boundary"; - -export default function App() { - const [error, setError] = useState(null); - - function handleUnknown() { - setError("unknown"); - } - - function handleKnown() { - setError("known"); - } - - return ( - <> - { - setError(null); - }} - > - {error != null && } - This error will not show the error dialog: - - This error will show the error dialog: - - - - - ); -} - -function fallbackRender({ resetErrorBoundary }) { - return ( -
      -

      Error Boundary

      -

      Something went wrong.

      - -
      - ); -} - -function Throw({error}) { - if (error === "known") { - throw new Error('Known error') - } else { - foo.bar = 'baz'; - } -} -``` - -```json package.json hidden -{ - "dependencies": { - "react": "19.0.0-rc-3edc000d-20240926", - "react-dom": "19.0.0-rc-3edc000d-20240926", - "react-scripts": "^5.0.0", - "react-error-boundary": "4.0.3" }, - "main": "/index.js" -} +}); ``` -
      +The onCaughtError option is a function called with two arguments: +<<<<<<< HEAD ### 復帰可能なエラーに対するダイアログを表示 {/*displaying-a-dialog-for-recoverable-errors*/} React はレンダー中にスローされたエラーから復帰するためにコンポーネントを自動的に再度レンダーすることがあります。成功すると、コンソールに復帰可能なエラーについてログを残し、開発者に通知します。この動作をオーバーライドするには、省略可能なルートオプションである `onRecoverableError` を指定します。 @@ -882,238 +823,113 @@ root.render(); 2. errorInfo オブジェクト。エラーの componentStack を含んでいる。 `onRecoverableError` を用いてエラーダイアログを表示することができます。 +======= +1. The error that was thrown. +2. An errorInfo object that contains the componentStack of the error. - +Together with `onUncaughtError` and `onRecoverableError`, you can can implement your own error reporting system: +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 -```html index.html hidden - - - - My app - - - - - -
      - - -``` - -```css src/styles.css active -label, button { display: block; margin-bottom: 20px; } -html, body { min-height: 300px; } - -#error-dialog { - position: absolute; - top: 0; - right: 0; - bottom: 0; - left: 0; - background-color: white; - padding: 15px; - opacity: 0.9; - text-wrap: wrap; - overflow: scroll; -} - -.text-red { - color: red; -} - -.-mb-20 { - margin-bottom: -20px; -} - -.mb-0 { - margin-bottom: 0; -} - -.mb-10 { - margin-bottom: 10px; -} - -pre { - text-wrap: wrap; -} - -pre.nowrap { - text-wrap: nowrap; -} + -.hidden { - display: none; +```js src/reportError.js +function reportError({ type, error, errorInfo }) { + // The specific implementation is up to you. + // `console.error()` is only used for demonstration purposes. + console.error(type, error, "Component Stack: "); + console.error("Component Stack: ", errorInfo.componentStack); } -``` - -```js src/reportError.js hidden -function reportError({ title, error, componentStack, dismissable }) { - const errorDialog = document.getElementById("error-dialog"); - const errorTitle = document.getElementById("error-title"); - const errorMessage = document.getElementById("error-message"); - const errorBody = document.getElementById("error-body"); - const errorComponentStack = document.getElementById("error-component-stack"); - const errorStack = document.getElementById("error-stack"); - const errorClose = document.getElementById("error-close"); - const errorCause = document.getElementById("error-cause"); - const errorCauseMessage = document.getElementById("error-cause-message"); - const errorCauseStack = document.getElementById("error-cause-stack"); - const errorNotDismissible = document.getElementById("error-not-dismissible"); - - // Set the title - errorTitle.innerText = title; - - // Display error message and body - const [heading, body] = error.message.split(/\n(.*)/s); - errorMessage.innerText = heading; - if (body) { - errorBody.innerText = body; - } else { - errorBody.innerText = ''; - } - - // Display component stack - errorComponentStack.innerText = componentStack; - - // Display the call stack - // Since we already displayed the message, strip it, and the first Error: line. - errorStack.innerText = error.stack.replace(error.message, '').split(/\n(.*)/s)[1]; - // Display the cause, if available - if (error.cause) { - errorCauseMessage.innerText = error.cause.message; - errorCauseStack.innerText = error.cause.stack; - errorCause.classList.remove('hidden'); - } else { - errorCause.classList.add('hidden'); +export function onCaughtErrorProd(error, errorInfo) { + if (error.message !== "Known error") { + reportError({ type: "Caught", error, errorInfo }); } - // Display the close button, if dismissible - if (dismissable) { - errorNotDismissible.classList.add('hidden'); - errorClose.classList.remove("hidden"); - } else { - errorNotDismissible.classList.remove('hidden'); - errorClose.classList.add("hidden"); - } - - // Show the dialog - errorDialog.classList.remove("hidden"); } -export function reportCaughtError({error, cause, componentStack}) { - reportError({ title: "Caught Error", error, componentStack, dismissable: true}); +export function onUncaughtErrorProd(error, errorInfo) { + reportError({ type: "Uncaught", error, errorInfo }); } -export function reportUncaughtError({error, cause, componentStack}) { - reportError({ title: "Uncaught Error", error, componentStack, dismissable: false }); -} - -export function reportRecoverableError({error, cause, componentStack}) { - reportError({ title: "Recoverable Error", error, componentStack, dismissable: true }); +export function onRecoverableErrorProd(error, errorInfo) { + reportError({ type: "Recoverable", error, errorInfo }); } ``` ```js src/index.js active import { createRoot } from "react-dom/client"; import App from "./App.js"; -import {reportRecoverableError} from "./reportError"; -import "./styles.css"; +import { + onCaughtErrorProd, + onRecoverableErrorProd, + onUncaughtErrorProd, +} from "./reportError"; const container = document.getElementById("root"); const root = createRoot(container, { - onRecoverableError: (error, errorInfo) => { - reportRecoverableError({ - error, - cause: error.cause, - componentStack: errorInfo.componentStack, - }); - } + // Keep in mind to remove these options in development to leverage + // React's default handlers or implement your own overlay for development. + // The handlers are only specfied unconditionally here for demonstration purposes. + onCaughtError: onCaughtErrorProd, + onRecoverableError: onRecoverableErrorProd, + onUncaughtError: onUncaughtErrorProd, }); root.render(); ``` ```js src/App.js -import { useState } from 'react'; -import { ErrorBoundary } from "react-error-boundary"; +import { Component, useState } from "react"; -// 🚩 Bug: Never do this. This will force an error. -let errorThrown = false; -export default function App() { - return ( - <> - - {!errorThrown && } -

      This component threw an error, but recovered during a second render.

      -

      Since it recovered, no Error Boundary was shown, but onRecoverableError was used to show an error dialog.

      -
      - - - ); +function Boom() { + foo.bar = "baz"; } -function fallbackRender() { - return ( -
      -

      Error Boundary

      -

      Something went wrong.

      -
      - ); -} +class ErrorBoundary extends Component { + state = { hasError: false }; + + static getDerivedStateFromError(error) { + return { hasError: true }; + } -function Throw({error}) { - // Simulate an external value changing during concurrent render. - errorThrown = true; - foo.bar = 'baz'; + render() { + if (this.state.hasError) { + return

      Something went wrong.

      ; + } + return this.props.children; + } } -``` -```json package.json hidden -{ - "dependencies": { - "react": "19.0.0-rc-3edc000d-20240926", - "react-dom": "19.0.0-rc-3edc000d-20240926", - "react-scripts": "^5.0.0", - "react-error-boundary": "4.0.3" - }, - "main": "/index.js" +export default function App() { + const [triggerUncaughtError, settriggerUncaughtError] = useState(false); + const [triggerCaughtError, setTriggerCaughtError] = useState(false); + + return ( + <> + + {triggerUncaughtError && } + + {triggerCaughtError && ( + + + + )} + + ); } ```
      +<<<<<<< HEAD --- ## トラブルシューティング {/*troubleshooting*/} +======= +## Troubleshooting {/*troubleshooting*/} +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 ### ルートを作成したが何も表示されない {/*ive-created-a-root-but-nothing-is-displayed*/} diff --git a/src/content/reference/react-dom/client/hydrateRoot.md b/src/content/reference/react-dom/client/hydrateRoot.md index aa126b296..a4583b091 100644 --- a/src/content/reference/react-dom/client/hydrateRoot.md +++ b/src/content/reference/react-dom/client/hydrateRoot.md @@ -99,7 +99,11 @@ React で完全に構築されたアプリには、通常、`root.unmount` の これは主に、React ルートの DOM ノード(またはその祖先のいずれか)が他のコードによって DOM から削除される可能性がある場合に有用です。例えば、非アクティブなタブを DOM から削除する jQuery のタブパネルがあると想像してみてください。タブが削除されると、(React ルートを含んだ)内部のすべてが DOM から削除されます。その場合、削除されたルートのコンテンツの管理を「停止」するよう React に伝えるために `root.unmount` を呼び出す必要があります。そうしないと、削除されたルート内のコンポーネントは、データ購読などのグローバルリソースをクリーンアップして解放する必要があるということが分からないままになります。 +<<<<<<< HEAD `root.unmount` を呼び出すことで、ルート内のすべてのコンポーネントがアンマウントされ、React がルート DOM ノードから「切り離され」ます。これには、ツリー内のイベントハンドラや state の削除も含まれます。 +======= +Calling `root.unmount` will unmount all the components in the root and "detach" React from the root DOM node, including removing any event handlers or state in the tree. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 #### 引数 {/*root-unmount-parameters*/} @@ -270,7 +274,11 @@ export default function App() {
      +<<<<<<< HEAD これは単一レベルの深さまでしか機能せず、避難ハッチとしての使用を意図しています。過度に使用しないでください。これを使用してもテキストコンテンツ以外の場合は React は違いを修正しようとはしないため、将来の更新まで一貫性が保たれない可能性があります。 +======= +This only works one level deep, and is intended to be an escape hatch. Don’t overuse it. React will **not** attempt to patch mismatched text content. +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 --- @@ -374,6 +382,7 @@ export default function App({counter}) { ハイドレーションされたルートで [`root.render`](#root-render) を呼び出すことは滅多にありません。通常、代わりにコンポーネントの中で [state を更新](/reference/react/useState) します。 +<<<<<<< HEAD ### キャッチされないエラーに対するダイアログを表示 {/*show-a-dialog-for-uncaught-errors*/} デフォルトでは React は、キャッチされなかったエラーをコンソールにログとして表示します。独自のエラーレポーティングを実装するには、省略可能なルートオプションである `onUncaughtError` を指定します。 @@ -566,25 +575,30 @@ export function reportRecoverableError({error, cause, componentStack}) { ``` ```js src/index.js active +======= +### Error logging in production {/*error-logging-in-production*/} + +By default, React will log all errors to the console. To implement your own error reporting, you can provide the optional error handler root options `onUncaughtError`, `onCaughtError` and `onRecoverableError`: + +```js [[1, 6, "onCaughtError"], [2, 6, "error", 1], [3, 6, "errorInfo"], [4, 10, "componentStack", 15]] +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 import { hydrateRoot } from "react-dom/client"; -import App from "./App.js"; -import {reportUncaughtError} from "./reportError"; -import "./styles.css"; -import {renderToString} from 'react-dom/server'; +import { reportCaughtError } from "./reportError"; const container = document.getElementById("root"); -const root = hydrateRoot(container, , { - onUncaughtError: (error, errorInfo) => { - if (error.message !== 'Known error') { - reportUncaughtError({ +const root = hydrateRoot(container, { + onCaughtError: (error, errorInfo) => { + if (error.message !== "Known error") { + reportCaughtError({ error, - componentStack: errorInfo.componentStack + componentStack: errorInfo.componentStack, }); } - } + }, }); ``` +<<<<<<< HEAD ```js src/App.js import { useState } from 'react'; @@ -638,244 +652,106 @@ root.render(); 2. errorInfo オブジェクト。当該エラーの componentStack を含んでいる。 `onCaughtError` ルートオプションを用いて、エラーダイアログを表示したり、既知のエラーをログから除外したりできます。 +======= +The onCaughtError option is a function called with two arguments: - - -```html index.html hidden - - - - My app - - - - - -
      This error will not show the error dialog:This error will show the error dialog:
      - - -``` - -```css src/styles.css active -label, button { display: block; margin-bottom: 20px; } -html, body { min-height: 300px; } +1. The error that was thrown. +2. An errorInfo object that contains the componentStack of the error. -#error-dialog { - position: absolute; - top: 0; - right: 0; - bottom: 0; - left: 0; - background-color: white; - padding: 15px; - opacity: 0.9; - text-wrap: wrap; - overflow: scroll; -} +Together with `onUncaughtError` and `onRecoverableError`, you can implement your own error reporting system: +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 -.text-red { - color: red; -} - -.-mb-20 { - margin-bottom: -20px; -} - -.mb-0 { - margin-bottom: 0; -} - -.mb-10 { - margin-bottom: 10px; -} - -pre { - text-wrap: wrap; -} - -pre.nowrap { - text-wrap: nowrap; -} + -.hidden { - display: none; +```js src/reportError.js +function reportError({ type, error, errorInfo }) { + // The specific implementation is up to you. + // `console.error()` is only used for demonstration purposes. + console.error(type, error, "Component Stack: "); + console.error("Component Stack: ", errorInfo.componentStack); } -``` -```js src/reportError.js hidden -function reportError({ title, error, componentStack, dismissable }) { - const errorDialog = document.getElementById("error-dialog"); - const errorTitle = document.getElementById("error-title"); - const errorMessage = document.getElementById("error-message"); - const errorBody = document.getElementById("error-body"); - const errorComponentStack = document.getElementById("error-component-stack"); - const errorStack = document.getElementById("error-stack"); - const errorClose = document.getElementById("error-close"); - const errorCause = document.getElementById("error-cause"); - const errorCauseMessage = document.getElementById("error-cause-message"); - const errorCauseStack = document.getElementById("error-cause-stack"); - const errorNotDismissible = document.getElementById("error-not-dismissible"); - - // Set the title - errorTitle.innerText = title; - - // Display error message and body - const [heading, body] = error.message.split(/\n(.*)/s); - errorMessage.innerText = heading; - if (body) { - errorBody.innerText = body; - } else { - errorBody.innerText = ''; - } - - // Display component stack - errorComponentStack.innerText = componentStack; - - // Display the call stack - // Since we already displayed the message, strip it, and the first Error: line. - errorStack.innerText = error.stack.replace(error.message, '').split(/\n(.*)/s)[1]; - - // Display the cause, if available - if (error.cause) { - errorCauseMessage.innerText = error.cause.message; - errorCauseStack.innerText = error.cause.stack; - errorCause.classList.remove('hidden'); - } else { - errorCause.classList.add('hidden'); - } - // Display the close button, if dismissible - if (dismissable) { - errorNotDismissible.classList.add('hidden'); - errorClose.classList.remove("hidden"); - } else { - errorNotDismissible.classList.remove('hidden'); - errorClose.classList.add("hidden"); +export function onCaughtErrorProd(error, errorInfo) { + if (error.message !== "Known error") { + reportError({ type: "Caught", error, errorInfo }); } - - // Show the dialog - errorDialog.classList.remove("hidden"); } -export function reportCaughtError({error, cause, componentStack}) { - reportError({ title: "Caught Error", error, componentStack, dismissable: true}); -} - -export function reportUncaughtError({error, cause, componentStack}) { - reportError({ title: "Uncaught Error", error, componentStack, dismissable: false }); +export function onUncaughtErrorProd(error, errorInfo) { + reportError({ type: "Uncaught", error, errorInfo }); } -export function reportRecoverableError({error, cause, componentStack}) { - reportError({ title: "Recoverable Error", error, componentStack, dismissable: true }); +export function onRecoverableErrorProd(error, errorInfo) { + reportError({ type: "Recoverable", error, errorInfo }); } ``` ```js src/index.js active import { hydrateRoot } from "react-dom/client"; import App from "./App.js"; -import {reportCaughtError} from "./reportError"; -import "./styles.css"; +import { + onCaughtErrorProd, + onRecoverableErrorProd, + onUncaughtErrorProd, +} from "./reportError"; const container = document.getElementById("root"); -const root = hydrateRoot(container, , { - onCaughtError: (error, errorInfo) => { - if (error.message !== 'Known error') { - reportCaughtError({ - error, - componentStack: errorInfo.componentStack - }); - } - } +hydrateRoot(container, , { + // Keep in mind to remove these options in development to leverage + // React's default handlers or implement your own overlay for development. + // The handlers are only specfied unconditionally here for demonstration purposes. + onCaughtError: onCaughtErrorProd, + onRecoverableError: onRecoverableErrorProd, + onUncaughtError: onUncaughtErrorProd, }); ``` ```js src/App.js -import { useState } from 'react'; -import { ErrorBoundary } from "react-error-boundary"; +import { Component, useState } from "react"; -export default function App() { - const [error, setError] = useState(null); - - function handleUnknown() { - setError("unknown"); +function Boom() { + foo.bar = "baz"; +} + +class ErrorBoundary extends Component { + state = { hasError: false }; + + static getDerivedStateFromError(error) { + return { hasError: true }; } - function handleKnown() { - setError("known"); + render() { + if (this.state.hasError) { + return

      Something went wrong.

      ; + } + return this.props.children; } - - return ( - <> - { - setError(null); - }} - > - {error != null && } - This error will not show the error dialog: - - This error will show the error dialog: - - - - - ); } -function fallbackRender({ resetErrorBoundary }) { +export default function App() { + const [triggerUncaughtError, settriggerUncaughtError] = useState(false); + const [triggerCaughtError, setTriggerCaughtError] = useState(false); + return ( -
      -

      Error Boundary

      -

      Something went wrong.

      - -
      + <> + + {triggerUncaughtError && } + + {triggerCaughtError && ( + + + + )} + ); } - -function Throw({error}) { - if (error === "known") { - throw new Error('Known error') - } else { - foo.bar = 'baz'; - } -} ``` +<<<<<<< HEAD ```json package.json hidden { "dependencies": { @@ -923,6 +799,9 @@ const root = hydrateRoot( ```html index.html hidden +======= +```html public/index.html hidden +>>>>>>> 6326e7b1b9fa2a7e36a555792e2f1b97cfcf2669 @@ -930,226 +809,12 @@ const root = hydrateRoot( - - -
      Server
      +
      Server content before hydration.
      ``` - -```css src/styles.css active -label, button { display: block; margin-bottom: 20px; } -html, body { min-height: 300px; } - -#error-dialog { - position: absolute; - top: 0; - right: 0; - bottom: 0; - left: 0; - background-color: white; - padding: 15px; - opacity: 0.9; - text-wrap: wrap; - overflow: scroll; -} - -.text-red { - color: red; -} - -.-mb-20 { - margin-bottom: -20px; -} - -.mb-0 { - margin-bottom: 0; -} - -.mb-10 { - margin-bottom: 10px; -} - -pre { - text-wrap: wrap; -} - -pre.nowrap { - text-wrap: nowrap; -} - -.hidden { - display: none; -} -``` - -```js src/reportError.js hidden -function reportError({ title, error, componentStack, dismissable }) { - const errorDialog = document.getElementById("error-dialog"); - const errorTitle = document.getElementById("error-title"); - const errorMessage = document.getElementById("error-message"); - const errorBody = document.getElementById("error-body"); - const errorComponentStack = document.getElementById("error-component-stack"); - const errorStack = document.getElementById("error-stack"); - const errorClose = document.getElementById("error-close"); - const errorCause = document.getElementById("error-cause"); - const errorCauseMessage = document.getElementById("error-cause-message"); - const errorCauseStack = document.getElementById("error-cause-stack"); - const errorNotDismissible = document.getElementById("error-not-dismissible"); - - // Set the title - errorTitle.innerText = title; - - // Display error message and body - const [heading, body] = error.message.split(/\n(.*)/s); - errorMessage.innerText = heading; - if (body) { - errorBody.innerText = body; - } else { - errorBody.innerText = ''; - } - - // Display component stack - errorComponentStack.innerText = componentStack; - - // Display the call stack - // Since we already displayed the message, strip it, and the first Error: line. - errorStack.innerText = error.stack.replace(error.message, '').split(/\n(.*)/s)[1]; - - // Display the cause, if available - if (error.cause) { - errorCauseMessage.innerText = error.cause.message; - errorCauseStack.innerText = error.cause.stack; - errorCause.classList.remove('hidden'); - } else { - errorCause.classList.add('hidden'); - } - // Display the close button, if dismissible - if (dismissable) { - errorNotDismissible.classList.add('hidden'); - errorClose.classList.remove("hidden"); - } else { - errorNotDismissible.classList.remove('hidden'); - errorClose.classList.add("hidden"); - } - - // Show the dialog - errorDialog.classList.remove("hidden"); -} - -export function reportCaughtError({error, cause, componentStack}) { - reportError({ title: "Caught Error", error, componentStack, dismissable: true}); -} - -export function reportUncaughtError({error, cause, componentStack}) { - reportError({ title: "Uncaught Error", error, componentStack, dismissable: false }); -} - -export function reportRecoverableError({error, cause, componentStack}) { - reportError({ title: "Recoverable Error", error, componentStack, dismissable: true }); -} -``` - -```js src/index.js active -import { hydrateRoot } from "react-dom/client"; -import App from "./App.js"; -import {reportRecoverableError} from "./reportError"; -import "./styles.css"; - -const container = document.getElementById("root"); -const root = hydrateRoot(container, , { - onRecoverableError: (error, errorInfo) => { - reportRecoverableError({ - error, - cause: error.cause, - componentStack: errorInfo.componentStack - }); - } -}); -``` - -```js src/App.js -import { useState } from 'react'; -import { ErrorBoundary } from "react-error-boundary"; - -export default function App() { - const [error, setError] = useState(null); - - function handleUnknown() { - setError("unknown"); - } - - function handleKnown() { - setError("known"); - } - - return ( - {typeof window !== 'undefined' ? 'Client' : 'Server'} - ); -} - -function fallbackRender({ resetErrorBoundary }) { - return ( -
      -

      Error Boundary

      -

      Something went wrong.

      - -
      - ); -} - -function Throw({error}) { - if (error === "known") { - throw new Error('Known error') - } else { - foo.bar = 'baz'; - } -} -``` - -```json package.json hidden -{ - "dependencies": { - "react": "19.0.0-rc-3edc000d-20240926", - "react-dom": "19.0.0-rc-3edc000d-20240926", - "react-scripts": "^5.0.0", - "react-error-boundary": "4.0.3" - }, - "main": "/index.js" -} -``` -
      ## Troubleshooting {/*troubleshooting*/} diff --git a/src/content/reference/react-dom/components/form.md b/src/content/reference/react-dom/components/form.md index 4c3437513..8f3daa6c7 100644 --- a/src/content/reference/react-dom/components/form.md +++ b/src/content/reference/react-dom/components/form.md @@ -214,7 +214,7 @@ export default function App() { ]); async function sendMessage(formData) { const sentMessage = await deliverMessage(formData.get("message")); - setMessages([...messages, { text: sentMessage }]); + setMessages((messages) => [...messages, { text: sentMessage }]); } return ; } diff --git a/src/content/reference/react-dom/components/input.md b/src/content/reference/react-dom/components/input.md index 39f8b410f..79df95d41 100644 --- a/src/content/reference/react-dom/components/input.md +++ b/src/content/reference/react-dom/components/input.md @@ -297,7 +297,11 @@ input { margin: 5px; } +<<<<<<< HEAD デフォルトでは、`
      ` 内の*あらゆる* `