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* Failing test for #19608 * Attach Listeners Eagerly to Roots and Portal Containers * Forbid createEventHandle with custom events We can't support this without adding more complexity. It's not clear that this is even desirable, as none of our existing use cases need custom events. This API primarily exists as a deprecation strategy for Flare, so I don't think it is important to expand its support beyond what Flare replacement code currently needs. We can later revisit it with a better understanding of the eager/lazy tradeoff but for now let's remove the inconsistency. * Reduce risk by changing condition only under the flag Co-authored-by: koba04 <koba0004@gmail.com>
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.transform-error-messagesis a Babel pass that rewrites error messages to IDs for a production (minified) build.