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| import { Dispatch, SetStateAction, useState, useEffect } from 'react'; | |
| export function usePersistentState<T>( | |
| key: string, | |
| defaultValue: T | |
| ): [T, Dispatch<SetStateAction<T>>] { | |
| const [state, setState] = useState<T>(defaultValue); | |
| // Save to session storage on unload | |
| useEffect(() => { | |
| function handleBeforeUnload() { | |
| sessionStorage.setItem(key, JSON.stringify(state)); | |
| } | |
| window.addEventListener('beforeunload', handleBeforeUnload); | |
| return () => { | |
| window.removeEventListener('beforeunload', handleBeforeUnload); | |
| }; | |
| }, [key, state]); | |
| // Restore from session storage on mount | |
| useEffect(() => { | |
| const value = sessionStorage.getItem(key); | |
| if (value) { | |
| setState(JSON.parse(value)); | |
| sessionStorage.removeItem(key); | |
| } | |
| }, [key]); | |
| return [state, setState]; | |
| } |
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