Sync with react.dev @ 84f29eb2

.github/workflows/analyze.yml

@@ -11,18 +11,26 @@ jobs:
   analyze:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: '20.x'
+          cache: yarn
+          cache-dependency-path: yarn.lock
 
-      - name: Install dependencies
-        uses: bahmutov/[email protected]
+      - name: Restore cached node_modules
+        uses: actions/cache@v4
+        with:
+          path: "**/node_modules"
+          key: node_modules-${{ runner.arch }}-${{ runner.os }}-${{ hashFiles('yarn.lock') }}
+
+      - name: Install deps
+        run: yarn install --frozen-lockfile
 
       - name: Restore next build
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: restore-build-cache
         env:
           cache-name: cache-next-build
@@ -41,7 +49,7 @@ jobs:
         run: npx -p [email protected] report
 
       - name: Upload bundle
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           path: .next/analyze/__bundle_analysis.json
           name: bundle_analysis.json
@@ -73,7 +81,7 @@ jobs:
         run: ls -laR .next/analyze/base && npx -p nextjs-bundle-analysis compare
 
       - name: Upload analysis comment
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: analysis_comment.txt
           path: .next/analyze/__bundle_analysis_comment.txt
@@ -82,7 +90,7 @@ jobs:
         run: echo ${{ github.event.number }} > ./pr_number
 
       - name: Upload PR number
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: pr_number
           path: ./pr_number

.github/workflows/site_lint.yml

@@ -14,14 +14,22 @@ jobs:
     name: Lint on node 20.x and ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - name: Use Node.js 20.x
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: 20.x
+          cache: yarn
+          cache-dependency-path: yarn.lock
 
-      - name: Install deps and build (with cache)
-        uses: bahmutov/[email protected]
+      - name: Restore cached node_modules
+        uses: actions/cache@v4
+        with:
+          path: "**/node_modules"
+          key: node_modules-${{ runner.arch }}-${{ runner.os }}-${{ hashFiles('yarn.lock') }}
+
+      - name: Install deps
+        run: yarn install --frozen-lockfile
 
       - name: Lint codebase
         run: yarn ci-check

public/.well-known/atproto-did

@@ -0,0 +1 @@
+did:plc:uorpbnp2q32vuvyeruwauyhe

src/components/Icon/IconBsky.tsx

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ */
+
+import {memo} from 'react';
+
+export const IconBsky = memo<JSX.IntrinsicElements['svg']>(function IconBsky(
+  props
+) {
+  return (
+    <svg
+      aria-label="Bluesky"
+      viewBox="0 0 16 16"
+      height="1.25em"
+      width="1.25em"
+      fill="currentColor"
+      xmlns="http://www.w3.org/2000/svg"
+      {...props}>
+      <path
+        className="x19hqcy"
+        d="M3.468 1.948C5.303 3.325 7.276 6.118 8 7.616c.725-1.498 2.697-4.29 4.532-5.668C13.855.955 16 .186 16 2.632c0 .489-.28 4.105-.444 4.692-.572 2.04-2.653 2.561-4.504 2.246 3.236.551 4.06 2.375 2.281 4.2-3.376 3.464-4.852-.87-5.23-1.98-.07-.204-.103-.3-.103-.218 0-.081-.033.014-.102.218-.379 1.11-1.855 5.444-5.231 1.98-1.778-1.825-.955-3.65 2.28-4.2-1.85.315-3.932-.205-4.503-2.246C.28 6.737 0 3.12 0 2.632 0 .186 2.145.955 3.468 1.948Z"></path>
+    </svg>
+  );
+});

src/components/Layout/Footer.tsx

@@ -8,6 +8,7 @@ import cn from 'classnames';
 import {ExternalLink} from 'components/ExternalLink';
 import {IconFacebookCircle} from 'components/Icon/IconFacebookCircle';
 import {IconTwitter} from 'components/Icon/IconTwitter';
+import {IconBsky} from 'components/Icon/IconBsky';
 import {IconGitHub} from 'components/Icon/IconGitHub';
 
 export function Footer() {
@@ -370,6 +371,12 @@ export function Footer() {
               className={socialLinkClasses}>
               <IconTwitter />
             </ExternalLink>
+            <ExternalLink
+              aria-label="React on Bluesky"
+              href="https://bsky.app/profile/react.dev"
+              className={socialLinkClasses}>
+              <IconBsky />
+            </ExternalLink>
             <ExternalLink
               aria-label="React on Github"
               href="https://github.com/facebook/react"

src/components/MDX/Diagram.tsx

@@ -15,8 +15,8 @@ interface DiagramProps {
 
 function Caption({text}: {text: string}) {
   return (
-    <div className="w-full table">
-      <figcaption className="p-1 sm:p-2 mt-0 sm:mt-0 text-gray-40 text-base lg:text-lg text-center leading-tight table-caption">
+    <div className="w-full flex justify-center">
+      <figcaption className="p-1 sm:p-2 mt-0 sm:mt-0 text-gray-40 text-base lg:text-lg text-center leading-tight table-caption max-w-lg">
         {text}
       </figcaption>
     </div>

src/components/MDX/Sandpack/Preview.tsx

@@ -113,7 +113,7 @@ export function Preview({
           /**
            * The spinner component transition might be longer than
            * the bundler loading, so we only show the spinner if
-           * it takes more than 1s to load the bundler.
+           * it takes more than 500s to load the bundler.
            */
           timeout = setTimeout(() => {
             setShowLoading(true);

src/components/MDX/TeamMember.tsx

@@ -6,6 +6,7 @@ import * as React from 'react';
 import Image from 'next/image';
 import {IconTwitter} from '../Icon/IconTwitter';
 import {IconThreads} from '../Icon/IconThreads';
+import {IconBsky} from '../Icon/IconBsky';
 import {IconGitHub} from '../Icon/IconGitHub';
 import {ExternalLink} from '../ExternalLink';
 import {H3} from './Heading';
@@ -19,6 +20,7 @@ interface TeamMemberProps {
   photo: string;
   twitter?: string;
   threads?: string;
+  bsky?: string;
   github?: string;
   personal?: string;
 }
@@ -33,6 +35,7 @@ export function TeamMember({
   github,
   twitter,
   threads,
+  bsky,
   personal,
 }: TeamMemberProps) {
   if (name == null || title == null || permalink == null || children == null) {
@@ -62,11 +65,11 @@ export function TeamMember({
           </H3>
           {title && <div>{title}</div>}
           {children}
-          <div className="sm:flex sm:flex-row flex-wrap">
+          <div className="sm:flex sm:flex-row flex-wrap text-secondary dark:text-secondary-dark">
             {twitter && (
               <div className="me-4">
                 <ExternalLink
-                  aria-label="React on Twitter"
+                  aria-label={`${name} on Twitter`}
                   href={`https://twitter.com/${twitter}`}
                   className="hover:text-primary hover:underline dark:text-primary-dark flex flex-row items-center">
                   <IconTwitter className="pe-1" />
@@ -77,14 +80,25 @@ export function TeamMember({
             {threads && (
               <div className="me-4">
                 <ExternalLink
-                  aria-label="React on Threads"
+                  aria-label={`${name} on Threads`}
                   href={`https://threads.net/${threads}`}
                   className="hover:text-primary hover:underline dark:text-primary-dark flex flex-row items-center">
                   <IconThreads className="pe-1" />
                   {threads}
                 </ExternalLink>
               </div>
             )}
+            {bsky && (
+              <div className="me-4">
+                <ExternalLink
+                  aria-label={`${name} on Bluesky`}
+                  href={`https://bsky.app/profile/${bsky}`}
+                  className="hover:text-primary hover:underline dark:text-primary-dark flex flex-row items-center">
+                  <IconBsky className="pe-1" />
+                  {bsky}
+                </ExternalLink>
+              </div>
+            )}
             {github && (
               <div className="me-4">
                 <ExternalLink

src/content/blog/2024/04/25/react-19-upgrade-guide.md

@@ -353,7 +353,7 @@ npm install react-shallow-renderer --save-dev
 
 ##### Please reconsider shallow rendering {/*please-reconsider-shallow-rendering*/}
 
-Shallow rendering depends on React internals and can block you from future upgrades. We recommend migrating your tests to [@testing-library/react](https://testing-library.com/docs/react-testing-library/intro/) or [@testing-library/react-native](https://callstack.github.io/react-native-testing-library/docs/getting-started). 
+Shallow rendering depends on React internals and can block you from future upgrades. We recommend migrating your tests to [@testing-library/react](https://testing-library.com/docs/react-testing-library/intro/) or [@testing-library/react-native](https://testing-library.com/docs/react-native-testing-library/intro). 
 
 </Note>
 
@@ -524,7 +524,7 @@ We are deprecating `react-test-renderer` because it implements its own renderer
 
 The test renderer was created before there were more viable testing strategies available like [React Testing Library](https://testing-library.com), and we now recommend using a modern testing library instead.
 
-In React 19, `react-test-renderer` logs a deprecation warning, and has switched to concurrent rendering. We recommend migrating your tests to [@testing-library/react](https://testing-library.com/docs/react-testing-library/intro/) or [@testing-library/react-native](https://callstack.github.io/react-native-testing-library/docs/getting-started) for a modern and well supported testing experience.
+In React 19, `react-test-renderer` logs a deprecation warning, and has switched to concurrent rendering. We recommend migrating your tests to [@testing-library/react](https://testing-library.com/docs/react-testing-library/intro/) or [@testing-library/react-native](https://testing-library.com/docs/react-native-testing-library/intro) for a modern and well supported testing experience.
 
 ## Notable changes {/*notable-changes*/}
 
@@ -536,6 +536,24 @@ When double rendering in Strict Mode in development, `useMemo` and `useCallback`
 
 As with all Strict Mode behaviors, these features are designed to proactively surface bugs in your components during development so you can fix them before they are shipped to production. For example, during development, Strict Mode will double-invoke ref callback functions on initial mount, to simulate what happens when a mounted component is replaced by a Suspense fallback.
 
+### Improvements to Suspense {/*improvements-to-suspense*/}
+
+In React 19, when a component suspends, React will immediately commit the fallback of the nearest Suspense boundary without waiting for the entire sibling tree to render. After the fallback commits, React schedules another render for the suspended siblings to "pre-warm" lazy requests in the rest of the tree:
+
+<Diagram name="prerender" height={162} width={1270} alt="Diagram showing a tree of three components, one parent labeled Accordion and two children labeled Panel. Both Panel components contain isActive with value false.">
+
+Previously, when a component suspended, the suspended siblings were rendered and then the fallback was committed.
+
+</Diagram>
+
+<Diagram name="prewarm" height={162} width={1270} alt="The same diagram as the previous, with the isActive of the first child Panel component highlighted indicating a click with the isActive value set to true. The second Panel component still contains value false." >
+
+In React 19, when a component suspends, the fallback is committed and then the suspended siblings are rendered.
+
+</Diagram>
+
+This change means Suspense fallbacks display faster, while still warming lazy requests in the suspended tree.
+
 ### UMD builds removed {/*umd-builds-removed*/}
 
 UMD was widely used in the past as a convenient way to load React without a build step. Now, there are modern alternatives for loading modules as scripts in HTML documents. Starting with React 19, React will no longer produce UMD builds to reduce the complexity of its testing and release process.