@wordpress/compose/build-module/hooks/use-resize-observer/use-resize-observer.js

WordPress higher-order components (HOCs).

// packages/compose/src/hooks/use-resize-observer/use-resize-observer.ts
import { useRef } from "@wordpress/element";
import useEvent from "../use-event";
function useResizeObserver(callback, resizeObserverOptions = {}) {
  const callbackEvent = useEvent(callback);
  const observedElementRef = useRef();
  const resizeObserverRef = useRef();
  return useEvent((element) => {
    if (element === observedElementRef.current) {
      return;
    }
    resizeObserverRef.current ??= new ResizeObserver(callbackEvent);
    const { current: resizeObserver } = resizeObserverRef;
    if (observedElementRef.current) {
      resizeObserver.unobserve(observedElementRef.current);
    }
    observedElementRef.current = element;
    if (element) {
      resizeObserver.observe(element, resizeObserverOptions);
    }
  });
}
export {
  useResizeObserver
};
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