GoScrobble/web/node_modules/@restart/hooks/esm/useMergedRefs.js

40 lines
939 B
JavaScript
Raw Permalink Normal View History

2022-04-25 02:47:15 +00:00
import { useMemo } from 'react';
var toFnRef = function toFnRef(ref) {
return !ref || typeof ref === 'function' ? ref : function (value) {
ref.current = value;
};
};
export function mergeRefs(refA, refB) {
var a = toFnRef(refA);
var b = toFnRef(refB);
return function (value) {
if (a) a(value);
if (b) b(value);
};
}
/**
* Create and returns a single callback ref composed from two other Refs.
*
* ```tsx
* const Button = React.forwardRef((props, ref) => {
* const [element, attachRef] = useCallbackRef<HTMLButtonElement>();
* const mergedRef = useMergedRefs(ref, attachRef);
*
* return <button ref={mergedRef} {...props}/>
* })
* ```
*
* @param refA A Callback or mutable Ref
* @param refB A Callback or mutable Ref
* @category refs
*/
function useMergedRefs(refA, refB) {
return useMemo(function () {
return mergeRefs(refA, refB);
}, [refA, refB]);
}
export default useMergedRefs;