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TypeScript
useLocalStorage — Synced State
A useState replacement that persists to localStorage and syncs across tabs via the `storage` event. Strongly typed via the initial value's type.
@admin
JavaScript
LocalStorage with Expiry
Extends localStorage with TTL (time-to-live) support. setItem stores a value alongside an expiry timestamp. getItem returns null and removes the key if the TTL has elapsed. Useful for caching API responses client-side, storing ephemeral UI state, and implementing remember-me tokens without a backend session.