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Andrew Clark
52c393b5d2
* Refactor warnForTextDifference We're going to fork the behavior of this function between concurrent roots and legacy roots. The legacy behavior is to warn in dev when the text mismatches during hydration. In concurrent roots, we'll log a recoverable error and revert to client rendering. That means this is no longer a development-only function — it affects the prod behavior, too. I haven't changed any behavior in this commit. I only rearranged the code slightly so that the dev environment check is inside the body instead of around the function call. I also threaded through an isConcurrentMode argument. * Revert to client render on text content mismatch Expands the behavior of enableClientRenderFallbackOnHydrationMismatch to check text content, too. If the text is different from what was rendered on the server, we will recover the UI by falling back to client rendering, up to the nearest Suspense boundary.
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.