12 lines
330 B
TypeScript
Executable File
12 lines
330 B
TypeScript
Executable File
import {useEffect, useRef} from 'react';
|
|
|
|
export function usePrevious<T>(value: T) {
|
|
const ref = 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;
|
|
}
|