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import { useState } from 'react' |
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// Hook
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export const useLocalStorage = (key: string, initialValue: any) => { |
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// State to store our value
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// Pass initial state function to useState so logic is only executed once
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const [storedValue, setStoredValue] = useState<any>(() => { |
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try { |
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// Get from local storage by key
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const item = window.localStorage.getItem(key) |
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// Parse stored json or if none return initialValue
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return item ? JSON.parse(item) : initialValue |
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} catch (error) { |
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// If error also return initialValue
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console.log(error) |
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return initialValue |
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} |
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}) |
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// Return a wrapped version of useState's setter function that ...
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// ... persists the new value to localStorage.
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const setValue = (value: any | ((val: any) => any)) => { |
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try { |
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// Allow value to be a function so we have same API as useState
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const valueToStore = |
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value instanceof Function ? value(storedValue) : value |
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// Save state
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setStoredValue(valueToStore) |
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// Save to local storage
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window.localStorage.setItem(key, JSON.stringify(valueToStore)) |
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} catch (error) { |
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// A more advanced implementation would handle the error case
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console.log(error) |
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} |
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} |
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return [storedValue, setValue] as const |
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} |
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