[compiler] Feature flag cleanup#35825
Open
josephsavona wants to merge 18 commits intofacebook:mainfrom
Open
Conversation
github-actions
bot
added
the
React Core Team
josephsavona
commented
Feb 20, 2026
Remove unused throwInvalidReact and matchCompilerDiagnostic functions from ValidateNoUntransformedReferences.ts (left over from removing inferEffectDependencies and enableFire flags), and remove unused Identifier import from ValidateNoRefAccessInRender.ts (left over from removing enableInferEventHandlers flag).
josephsavona
force-pushed
the
feature-flag-cleanup
branch
from
a0ae56e to
e9206fe
Compare
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Cleans up feature flags that do not have an active experiment and which we don't currently plan to ship, one commit per flag.
To decide which features to remove, I looked at Meta's internal repos as well as eslint-pugin-react-hooks to see which flags were never overridden anywhere. That gave a longer list of flags, from which I then removed some features that I know are used in OSS.