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React / Next.js hooks snippets

Client and server components, hooks and route handlers. 6 free snippets, each with an explanation and usage notes.
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snippets
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Hooks snippets

React / Next.js · HooksVisibility-aware polling hookPoll an async function on an interval that pauses in hidden tabs, backs off on errors and cancels in-flight work on unmount.reactpollinghook React / Next.js · HooksSafe localStorage state hookA hydration-safe React hook that persists state in localStorage, survives blocked storage and syncs across browser tabs.reactlocalstoragehook React / Next.js · HooksUndo and redo history hookA reducer-based React hook that adds undo, redo, a history limit and coalesced updates to any piece of state.reactundo-redohistory React / Next.js · HooksDrag-and-drop file hookA small React hook that turns any element into a file drop zone with an accept filter and a stable dragging flag.reactdrag-dropfiles React / Next.js · HooksDrift-free countdown timer hookA React hook that counts down to a deadline using timestamps so it stays accurate through throttled tabs and pauses.reacttimercountdown React / Next.js · HooksPan and zoom surface hookA React hook that adds wheel zoom around the cursor, drag panning and a CSS transform to any large canvas or diagram.reactpanzoom