docs(en): merge reactjs.org/main into zh-hans.reactjs.org/main @ 366b5fbd #1793
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The previous sentence "If you are using React Compiler, useMemo, useCallback, and React.memo can be removed." was coming off a bit too strong and makes it incorrectly seem like the manual memos and compiler memos are 1:1. Removing the sentence doesn't take anything away from this paragraph, so let's remove it to reduce confusion.
Updates our previous RC blogpost to point people to the `rc` tag, not the specific rc version
The compiler rule is now enabled by default in 6.0.0-rc.2, so there is no longer a need to manually enable the compiler rule in user's eslint configs.
Co-authored-by: unknown <[email protected]~>
`a expensive` should be `an expensive`
Fix "documentatino" typo to "documentation" in comment about useOptimistic reference page.
…d example of the use API (#7767) * Update "Deep Dive" in reusing-logic-with-custom-hooks.md with link to and example of the use API * Remove mention of Server Components when explaining the use API * Update src/content/learn/reusing-logic-with-custom-hooks.md Co-authored-by: Ricky <[email protected]> * fix: Correct which lines are highlighted in code example --------- Co-authored-by: Ricky <[email protected]>
The previous examples used a service called loremflickr.com to link to placeholder images. Since that service is now down, I updated them to reference placecats.com instead, which we already use in other examples as well. placecats doesn't have the same random cat feature so I roughly approximated it in the example code. Closes #7966
* Fix handleClick compiler intro example * Use a note instead * Update src/content/learn/react-compiler/introduction.md
* fix: changed source file names in docs from App.js, index.js and styles.css to src/ dir * fix: updated wrong image with the correct one with current sandbox file structure * refactor: reverted all formatting and just just mention src folder in introductory section * Reverted changes tutorial-tic-tac-toe.md * added enhanced image of sandbox
* docs: add flushSync Troubleshooting section * Update src/content/reference/react-dom/flushSync.md * oops * Apply suggestions from code review * formatting and pitfall --------- Co-authored-by: Ricky <[email protected]> Co-authored-by: Rick Hanlon <[email protected]>
* correct IconExperimental naming and usage (from #7972) Co-authored-by: Tuna <[email protected]> * Bump Activity to Canary in docs --------- Co-authored-by: Tuna <[email protected]>
Happened to notice we were still on an old version of the compiler. This PR upgrades us to use the latest RC.
Copied over our copyright script from the react repo. I made a small fix to handle shebangs.
…iler (#7988) In facebook/react#34462 for example, we found an issue where the compiler was incorrectly validating an example straight from the docs. In order to find more issues like this + also provide more feedback to doc authors on valid/invalid patterns, this PR adds a new local eslint rule which validates all markdown codeblocks containing components/hooks with React Compiler. An autofixer is also provided. To express that a codeblock has an expected error, we can use the following metadata: ```ts // pseudo type def type MarkdownCodeBlockMetadata = { expectedErrors?: { 'react-compiler'?: number[]; }; }; ``` and can be used like so: ```` ```js {expectedErrors: {'react-compiler': [4]}} // ❌ setState directly in render function Component({value}) { const [count, setCount] = useState(0); setCount(value); // error on L4 return <div>{count}</div>; } ``` ```` Because this is defined as a local rule, we don't have the same granular reporting that `eslint-plugin-react-hooks` yet. I can look into that later but for now this first PR just sets us up with something basic.
* Add local eslint rule to validate markdown codeblocks with React Compiler In facebook/react#34462 for example, we found an issue where the compiler was incorrectly validating an example straight from the docs. In order to find more issues like this + also provide more feedback to doc authors on valid/invalid patterns, this PR adds a new local eslint rule which validates all markdown codeblocks containing components/hooks with React Compiler. An autofixer is also provided. To express that a codeblock has an expected error, we can use the following metadata: ```ts // pseudo type def type MarkdownCodeBlockMetadata = { expectedErrors?: { 'react-compiler'?: number[]; }; }; ``` and can be used like so: ```` ```js {expectedErrors: {'react-compiler': [4]}} // ❌ setState directly in render function Component({value}) { const [count, setCount] = useState(0); setCount(value); // error on L4 return <div>{count}</div>; } ``` ```` Because this is defined as a local rule, we don't have the same granular reporting that `eslint-plugin-react-hooks` yet. I can look into that later but for now this first PR just sets us up with something basic. * fix compiler errors I went through the list of existing errors and tried to separate the expected errors from those that seem to be flagging unexpected issues. In particular, our effects validations are flagging patterns that our own docs examples use. I added todos for these and will follow up later.
This reverts commit 5cc9b7b.
Previously, `createFileMap` split the MDX meta string on spaces and assumed the first token was the filename. Once we prefixed code fences with `{expectedErrors: ...}`, it would incorrectly parse the meta and crash.
This PR updates createFileMap to skip tokens in the meta containing a start and end brace pair (using a stack to ensure we close on the correct brace) while tokenizing the meta string as expected.
Test plan: pages reported in #7994 no longer crash on the next PR
Closes #7994
* Ignore braces when building Sandpack file map
Previously, `createFileMap` split the MDX meta string on spaces and assumed the first token was the filename. Once we prefixed code fences with `{expectedErrors: ...}`, it would incorrectly parse the meta and crash.
This PR updates createFileMap to skip tokens in the meta containing a start and end brace pair (using a stack to ensure we close on the correct brace) while tokenizing the meta string as expected.
Test plan: pages reported in #7994 no longer crash on the next PR
Closes #7994
* Restore lint corrections from #7989
Reverts the revert now that we've fixed the bug. These pages should no longer crash:
https://react-dev-git-pr7997-fbopensource.vercel.app/learn/referencing-values-with-refs
https://react-dev-git-pr7997-fbopensource.vercel.app/learn/synchronizing-with-effects
https://react-dev-git-pr7997-fbopensource.vercel.app/learn/separating-events-from-effects
https://react-dev-git-pr7997-fbopensource.vercel.app/learn/removing-effect-dependencies
https://react-dev-git-pr7997-fbopensource.vercel.app/learn/you-might-not-need-an-effect
For local dev and CI we want to have the eslint-local-rules running, so let's make sure both have their dependencies installed. We don't use a monorepo setup here, which is why they're currently setup as a two completely independent yarn workspaces.
Adds new docs for our new eslint rules.
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loveloki
previously approved these changes
Sep 22, 2025
Size changes📦 Next.js Bundle Analysis for react-devThis analysis was generated by the Next.js Bundle Analysis action. 🤖
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| Page | Size (compressed) |
|---|---|
global |
110.58 KB (🟡 +51 B) |
Details
The global bundle is the javascript bundle that loads alongside every page. It is in its own category because its impact is much higher - an increase to its size means that every page on your website loads slower, and a decrease means every page loads faster.
Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis
If you want further insight into what is behind the changes, give @next/bundle-analyzer a try!
Five Pages Changed Size
The following pages changed size from the code in this PR compared to its base branch:
| Page | Size (compressed) | First Load |
|---|---|---|
/404 |
130.48 KB (🟡 +106 B) |
241.06 KB |
/500 |
130.49 KB (🟡 +105 B) |
241.06 KB |
/[[...markdownPath]] |
133.07 KB (🟡 +376 B) |
243.65 KB |
/errors |
130.73 KB (🟡 +108 B) |
241.31 KB |
/errors/[errorCode] |
130.71 KB (🟡 +107 B) |
241.29 KB |
Details
Only the gzipped size is provided here based on an expert tip.
First Load is the size of the global bundle plus the bundle for the individual page. If a user were to show up to your website and land on a given page, the first load size represents the amount of javascript that user would need to download. If next/link is used, subsequent page loads would only need to download that page's bundle (the number in the "Size" column), since the global bundle has already been downloaded.
Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis
Next to the size is how much the size has increased or decreased compared with the base branch of this PR. If this percentage has increased by 10% or more, there will be a red status indicator applied, indicating that special attention should be given to this.
loveloki
approved these changes
Sep 23, 2025
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合并 reactjs/reactjs.org 的修改至本仓库（@ 366b5fb）
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