| /* 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 | |