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add new custom hooks

This commit is contained in:
marcoelissa 2022-12-14 23:23:45 +07:00
parent 88e78afe5e
commit 2949d101b6
2 changed files with 57 additions and 0 deletions

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import { useState } from 'react'
function useLocalStorage<T>(key: string, initialValue: T) {
// State to store our value
// Pass initial state function to useState so logic is only executed once
const [storedValue, setStoredValue] = useState<T>(() => {
if (typeof window === 'undefined') {
return initialValue
}
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 = (value: T | ((val: T) => T)) => {
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
if (typeof window !== 'undefined') {
window.localStorage.setItem(key, JSON.stringify(valueToStore))
}
} catch (error) {
// A more advanced implementation would handle the error case
console.log(error)
}
}
return [storedValue, setValue] as const
}
export default useLocalStorage

15
src/@hooks/usePrevious.ts Normal file
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import { useEffect, useRef } from 'react'
function usePrevious<T>(value: T): T {
// The ref object is a generic container whose current property is mutable ...
// ... and can hold any value, similar to an instance property on a class
const ref: any = useRef<T>()
// Store current value in ref
useEffect(() => {
ref.current = value
}, [value]) // Only re-run if value changes
// Return previous value (happens before update in useEffect above)
return ref.current
}
export default usePrevious