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May 6, 2020 10:22
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Custom hook that keeps track of the previous value of an object or primitive, useful for comparing props between renders
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| import { useEffect, useRef } from 'react' | |
| export function usePrevious<T>(value: T) { | |
| const ref = useRef<T>() | |
| useEffect(() => { | |
| ref.current = value | |
| }) | |
| return ref.current | |
| } |
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