Created
April 21, 2021 12:09
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import {useState, useEffect} from 'preact/hooks'; | |
export const getStorage = (key, initValue = undefined, session = false, decode = data => data) => { | |
if (typeof window == "undefined") return initValue; | |
const item = session ? | |
window.sessionStorage.getItem(key) : | |
window.localStorage.getItem(key); | |
return item !== undefined && item !== null ? decode(item) : initValue; | |
}; | |
export const setStorage = (key, value, session = false, encode = data => data) => { | |
if (typeof window == "undefined") return; | |
session ? | |
window.sessionStorage.setItem(key, encode(value)) : | |
window.localStorage.setItem(key, encode(value)); | |
}; | |
export const removeStorage = (key, session = false) => { | |
if (typeof window == "undefined") return; | |
session ? | |
window.sessionStorage.removeItem(key) : | |
window.localStorage.removeItem(key); | |
}; | |
export const useStorage = (key, initValue = undefined, session = false, decode = data => data, encode = data => data) => { | |
const [state, setState] = useState(() => getStorage(key, initValue, session, decode)); | |
const updateValue = (val) => { | |
if (typeof window == "undefined") return; | |
if (val !== state) { | |
setStorage(key, val, session, encode); | |
setState(val); | |
} | |
}; | |
const removeValue = () => { | |
if (typeof window == "undefined") return; | |
removeStorage(key, session); | |
setState(undefined); | |
}; | |
useEffect(() => { | |
if (typeof window == "undefined") return; | |
if (session) return; | |
const listener = (e) => { | |
if (e.key === key) | |
setState(decode(e.newValue)); | |
}; | |
// register change listener | |
window.addEventListener('storage', listener); | |
// unregister at destroy | |
return () => window.removeEventListener('storage', listener); | |
}, [key, session]); | |
return [state, updateValue, removeValue]; | |
}; | |
export const setJsonStorage = (key, value, session = false) => | |
setStorage(key, value, session, JSON.stringify); | |
export const getJsonStorage = (key, initValue = undefined, session = false) => | |
getStorage(key, initValue, session, JSON.parse); | |
export const useJsonStorage = (key, initValue = undefined, session = false) => | |
useStorage(key, initValue, session, JSON.parse, JSON.stringify); |
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