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Remove seeing useContext as HOOKS_STATE #952

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Merged
JoviDeCroock merged 1 commit into from
Jul 7, 2026
Merged

Remove seeing useContext as HOOKS_STATE #952

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5 changes: 5 additions & 0 deletions .changeset/lucky-pears-brake.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@preact/signals": patch
---

Stop treating `useContext` as hook state in the auto-memoization heuristic. Context updates force-update their subscribers in Preact, bypassing `shouldComponentUpdate` entirely, so context consumers can safely keep the props-based render skipping.
2 changes: 1 addition & 1 deletion packages/preact/src/index.ts
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Expand Up @@ -389,7 +389,7 @@ hook(OptionsTypes.UNMOUNT, (old, vnode: VNode) => {

/** Mark components that use hook state so we can skip sCU optimization. */
hook(OptionsTypes.HOOK, (old, component, index, type) => {
if (type < 3 || type === 9)
if (type < 3)
(component as AugmentedComponent)._updateFlags |= HAS_HOOK_STATE;
old(component, index, type);
});
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