[compiler] Enable validateNoVoidUseMemo in eslint & playground #34022
Conversation
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
This was referenced Jul 28, 2025
github-actions
bot
added
the
React Core Team
|
Comparing: eaee530...b544b15 Critical size changesIncludes critical production bundles, as well as any change greater than 2%:
Significant size changesIncludes any change greater than 0.2%: Expand to show
|
Member
josephsavona
left a comment
josephsavona
left a comment
There was a problem hiding this comment.
Can you enable in the playground too?
poteto
changed the title
Member
Author
Enabled! |
poteto
added a commit
that referenced
this pull request
Jul 28, 2025
…33989) Adds a new property to ReturnTerminals to disambiguate whether it was explicit, implicit (arrow function expressions), or void (where it was omitted). I will use this property in the next PR adding a new validation pass. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/33989). * #34022 * #34002 * #34001 * #33990 * __->__ #33989
poteto
added a commit
that referenced
this pull request
Jul 28, 2025
Adds a new validation pass to validate against `useMemo`s that don't return anything. This usually indicates some kind of "useEffect"-like code that has side effects that need to be memoized to prevent overfiring, and is an anti-pattern. A follow up validation could also look at the return value of `useMemo`s to see if they are being used. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/33990). * #34022 * #34002 * #34001 * __->__ #33990 * #33989
github-actions bot
pushed a commit
that referenced
this pull request
Jul 28, 2025
…33989) Adds a new property to ReturnTerminals to disambiguate whether it was explicit, implicit (arrow function expressions), or void (where it was omitted). I will use this property in the next PR adding a new validation pass. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/33989). * #34022 * #34002 * #34001 * #33990 * __->__ #33989 DiffTrain build for [5dd622e](5dd622e)
github-actions bot
pushed a commit
that referenced
this pull request
Jul 28, 2025
…33989) Adds a new property to ReturnTerminals to disambiguate whether it was explicit, implicit (arrow function expressions), or void (where it was omitted). I will use this property in the next PR adding a new validation pass. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/33989). * #34022 * #34002 * #34001 * #33990 * __->__ #33989 DiffTrain build for [5dd622e](5dd622e)
poteto
added a commit
that referenced
this pull request
Jul 28, 2025
) Much of the logic in the new validation pass is already implemented in DropManualMemoization, so let's combine them. I opted to keep the environment flag so we can more precisely control the rollout. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/34001). * #34022 * #34002 * __->__ #34001
github-actions bot
pushed a commit
that referenced
this pull request
Jul 28, 2025
Adds a new validation pass to validate against `useMemo`s that don't return anything. This usually indicates some kind of "useEffect"-like code that has side effects that need to be memoized to prevent overfiring, and is an anti-pattern. A follow up validation could also look at the return value of `useMemo`s to see if they are being used. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/33990). * #34022 * #34002 * #34001 * __->__ #33990 * #33989 DiffTrain build for [c60eebf](c60eebf)
github-actions bot
pushed a commit
that referenced
this pull request
Jul 28, 2025
Adds a new validation pass to validate against `useMemo`s that don't return anything. This usually indicates some kind of "useEffect"-like code that has side effects that need to be memoized to prevent overfiring, and is an anti-pattern. A follow up validation could also look at the return value of `useMemo`s to see if they are being used. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/33990). * #34022 * #34002 * #34001 * __->__ #33990 * #33989 DiffTrain build for [c60eebf](c60eebf)
poteto
added a commit
that referenced
this pull request
Jul 28, 2025
…34002) Noticed this from my previous PR that this pass was throwing on the first error. This PR is a small refactor to aggregate every violation and report them all at once. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/34002). * #34022 * __->__ #34002
Enables `validateNoVoidUseMemo` by default only in eslint (it defaults to false otherwise) as well as the playground.
github-actions bot
pushed a commit
that referenced
this pull request
Jul 28, 2025
…34002) Noticed this from my previous PR that this pass was throwing on the first error. This PR is a small refactor to aggregate every violation and report them all at once. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/34002). * #34022 * __->__ #34002 DiffTrain build for [6b22f31](6b22f31)
github-actions bot
pushed a commit
that referenced
this pull request
Jul 28, 2025
…34002) Noticed this from my previous PR that this pass was throwing on the first error. This PR is a small refactor to aggregate every violation and report them all at once. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/react/pull/34002). * #34022 * __->__ #34002 DiffTrain build for [6b22f31](6b22f31)
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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.
Enables
validateNoVoidUseMemoby default only in eslint (it defaults to false otherwise) as well as the playground.