@rc-component/trigger/es/hooks/useWatch.js

base abstract trigger component for react

import useLayoutEffect from "@rc-component/util/es/hooks/useLayoutEffect";
import { collectScroller, getWin } from "../util";
export default function useWatch(open, target, popup, onAlign, onScroll) {
  useLayoutEffect(() => {
    if (open && target && popup) {
      const targetElement = target;
      const popupElement = popup;
      const targetScrollList = collectScroller(targetElement);
      const popupScrollList = collectScroller(popupElement);
      const win = getWin(popupElement);
      const mergedList = new Set([win, ...targetScrollList, ...popupScrollList]);
      function notifyScroll() {
        onAlign();
        onScroll();
      }
      mergedList.forEach(scroller => {
        scroller.addEventListener('scroll', notifyScroll, {
          passive: true
        });
      });
      win.addEventListener('resize', notifyScroll, {
        passive: true
      });

      // First time always do align
      onAlign();
      return () => {
        mergedList.forEach(scroller => {
          scroller.removeEventListener('scroll', notifyScroll);
          win.removeEventListener('resize', notifyScroll);
        });
      };
    }
  }, [open, target, popup]);
}