fix: useLocalStorage overload for correct undefined behavior #2556
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Fixes streamich#2551 Instead of using a single function which accepts `defaultValue?: T` - which forces a return type of `T | undefined`, use an overload. When a defaultValue is supplied, the useState-like tuple returned uses `T`. When no defaultValue is supplied, it's `T | undefined`. Runtime usage is exaclty the same, this just improves the types.
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Fixes #2551
Instead of using a single function which accepts
defaultValue?: T- which forces a return type ofT | undefined, use an overload. When a defaultValue is supplied, the useState-like tuple returned usesT. When no defaultValue is supplied, it'sT | undefined.Runtime usage is exaclty the same, this just improves the types.
TypeScript playground demo of the bug and the fix.
Type of change
Checklist
Note: I tested this in my
node_modulesfolder and the typescript playground, but I pasted into the GitHub web UI, so I'm hoping that CI will catch any regressions. If anything goes red I'll clone locally and fix.yarn test)yarn lint). Fix it withyarn lint:fixin case of failure.yarn lint:types).