mirror of
https://github.com/zebrajr/react.git
synced 2026-01-15 12:15:22 +00:00
5c8dabf886
Adds a development warning to complement the error introduced by https://github.com/facebook/react/pull/27019. We can detect and warn about async client components by checking the prototype of the function. This won't work for environments where async functions are transpiled, but for native async functions, it allows us to log an earlier warning during development, including in cases that don't trigger the infinite loop guard added in https://github.com/facebook/react/pull/27019. It does not supersede the infinite loop guard, though, because that mechanism also prevents the app from crashing. I also added a warning for calling a hook inside an async function. This one fires even during a transition. We could add a corresponding warning to Flight, since hooks are not allowed in async Server Components, either. (Though in both environments, this is better handled by a lint rule.)
The error code system substitutes React's error messages with error IDs to provide a better debugging support in production. Check out the blog post here.
codes.jsoncontains the mapping from IDs to error messages. This file is generated by the Gulp plugin and is used by both the Babel plugin and the error decoder page in our documentation. This file is append-only, which means an existing code in the file will never be changed/removed.extract-errors.jsis an node script that traverses our codebase and updatescodes.json. You can test it by runningyarn extract-errors. It works by crawling the build artifacts directory, so you need to have either run the build script or downloaded pre-built artifacts (e.g. withyarn download build). It works with partial builds, too.transform-error-messagesis a Babel pass that rewrites error messages to IDs for a production (minified) build.