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@josephsavona josephsavona commented Nov 21, 2025

When checking ValidateExhaustiveDeps internally, this seems to be the most common case that it flags. The current exhaustive-deps rule allows extraneous deps if they are a set of stable types. So here we reuse our existing isStableType() util in the compiler to allow this case.


Stack created with Sapling. Best reviewed with ReviewStack.

@meta-cla meta-cla bot added the CLA Signed label Nov 21, 2025
@github-actions github-actions bot added the React Core Team Opened by a member of the React Core Team label Nov 21, 2025
josephsavona added a commit that referenced this pull request Nov 24, 2025
…35184)

With `ValidateExhaustiveMemoDependencies` we can now check exhaustive
dependencies for useMemo and useCallback within the compiler, without
relying on the separate exhaustive-deps rule. Until now we've bailed out
of any component/hook that suppresses this rule, since the suppression
_might_ affect a memoization value. Compiling code with incorrect memo
deps can change behavior so this wasn't safe. The downside was that a
suppression within a useEffect could prevent memoization, even though
non-exhaustive deps for effects do not cause problems for memoization
specifically.

So here, we change to ignore ESLint suppressions if we have both the
compiler's hooks validation and memo deps validations enabled.

Now we just have to test out the new validation and refine before we can
enable this by default.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35184).
* #35201
* #35202
* #35192
* #35190
* #35186
* #35185
* __->__ #35184
When checking ValidateExhaustiveDeps internally, this seems to be the most common case that it flags. The current exhaustive-deps rule allows extraneous deps if they are a set of stable types. So here we reuse our existing isStableType() util in the compiler to allow this case.
@josephsavona josephsavona merged commit c9a8cf3 into main Nov 24, 2025
17 of 18 checks passed
github-actions bot pushed a commit that referenced this pull request Nov 24, 2025
When checking ValidateExhaustiveDeps internally, this seems to be the
most common case that it flags. The current exhaustive-deps rule allows
extraneous deps if they are a set of stable types. So here we reuse our
existing isStableType() util in the compiler to allow this case.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35185).
* #35201
* #35202
* #35192
* #35190
* #35186
* __->__ #35185

DiffTrain build for [c9a8cf3](c9a8cf3)
github-actions bot pushed a commit that referenced this pull request Nov 24, 2025
When checking ValidateExhaustiveDeps internally, this seems to be the
most common case that it flags. The current exhaustive-deps rule allows
extraneous deps if they are a set of stable types. So here we reuse our
existing isStableType() util in the compiler to allow this case.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35185).
* #35201
* #35202
* #35192
* #35190
* #35186
* __->__ #35185

DiffTrain build for [c9a8cf3](c9a8cf3)
github-actions bot pushed a commit that referenced this pull request Nov 24, 2025
…35184)

With `ValidateExhaustiveMemoDependencies` we can now check exhaustive
dependencies for useMemo and useCallback within the compiler, without
relying on the separate exhaustive-deps rule. Until now we've bailed out
of any component/hook that suppresses this rule, since the suppression
_might_ affect a memoization value. Compiling code with incorrect memo
deps can change behavior so this wasn't safe. The downside was that a
suppression within a useEffect could prevent memoization, even though
non-exhaustive deps for effects do not cause problems for memoization
specifically.

So here, we change to ignore ESLint suppressions if we have both the
compiler's hooks validation and memo deps validations enabled.

Now we just have to test out the new validation and refine before we can
enable this by default.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35184).
* #35201
* #35202
* #35192
* #35190
* #35186
* #35185
* __->__ #35184

DiffTrain build for [fca172e](fca172e)
github-actions bot pushed a commit that referenced this pull request Nov 24, 2025
…35184)

With `ValidateExhaustiveMemoDependencies` we can now check exhaustive
dependencies for useMemo and useCallback within the compiler, without
relying on the separate exhaustive-deps rule. Until now we've bailed out
of any component/hook that suppresses this rule, since the suppression
_might_ affect a memoization value. Compiling code with incorrect memo
deps can change behavior so this wasn't safe. The downside was that a
suppression within a useEffect could prevent memoization, even though
non-exhaustive deps for effects do not cause problems for memoization
specifically.

So here, we change to ignore ESLint suppressions if we have both the
compiler's hooks validation and memo deps validations enabled.

Now we just have to test out the new validation and refine before we can
enable this by default.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35184).
* #35201
* #35202
* #35192
* #35190
* #35186
* #35185
* __->__ #35184

DiffTrain build for [fca172e](fca172e)
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