import { useRef } from 'react';
import useStableMemo from './useStableMemo';
import useWillUnmount from './useWillUnmount';
/**
* An _immediate_ effect that runs an effect callback when its dependency array
* changes. This is helpful for updates should must run during render, most
* commonly state derived from props; a more ergonomic version of https://reactjs.org/docs/hooks-faq.html#how-do-i-implement-getderivedstatefromprops
*
* ```ts
* function Example({ value }) {
* const [intermediaryValue, setValue] = useState(value);
*
* useUpdateImmediateEffect(() => {
* setValue(value)
* }, [value])
* ```
*
* @category effects
*/
function useUpdateImmediateEffect(effect, deps) {
var firstRef = useRef(true);
var tearDown = useRef();
useWillUnmount(function () {
if (tearDown.current) tearDown.current();
});
useStableMemo(function () {
if (firstRef.current) {
firstRef.current = false;
return;
}
if (tearDown.current) tearDown.current();
tearDown.current = effect();
}, deps);
}
export default useUpdateImmediateEffect;