/* eslint-disable no-console */ | |
import React, { useState } from 'react' | |
import { UseLocalStorageResult } from './use-local-storage-result.type.js' | |
/** | |
* @load ./use-local-storage.doc.md | |
* @subcategory Hooks | |
* @class | |
* @see https://usehooks.com/useLocalStorage | |
* | |
* @param {string} key key under which hook will store the data | |
* @param {T} initialValue value which will be stringified and stored | |
* @return {UseLocalStorageResult<T>} | |
* @bundle | |
* @type {Function} | |
*/ | |
export function useLocalStorage<T>(key: string, initialValue: T): UseLocalStorageResult<T> { | |
// State to store our value | |
// Pass initial state function to useState so logic is only executed once | |
const [storedValue, setStoredValue] = useState<T>(() => { | |
try { | |
// Get from local storage by key | |
const item = window.localStorage.getItem(key) | |
// Parse stored json or if none return initialValue | |
return item ? JSON.parse(item) : initialValue | |
} catch (error) { | |
// If error also return initialValue | |
console.log(error) | |
return initialValue | |
} | |
}) | |
// Return a wrapped version of useState's setter function that ... | |
// ... persists the new value to localStorage. | |
const setValue: React.Dispatch<React.SetStateAction<T>> = (value) => { | |
try { | |
// Allow value to be a function so we have same API as useState | |
const valueToStore = value instanceof Function ? value(storedValue) : value | |
// Save state | |
setStoredValue(valueToStore) | |
// Save to local storage | |
window.localStorage.setItem(key, JSON.stringify(valueToStore)) | |
} catch (error) { | |
// A more advanced implementation would handle the error case | |
console.log(error) | |
} | |
} | |
return [storedValue, setValue] | |
} | |
export default useLocalStorage | |