ahooks/es/useSize/index.js

react hooks library

import { __read } from "tslib";
import ResizeObserver from 'resize-observer-polyfill';
import useRafState from '../useRafState';
import { getTargetElement } from '../utils/domTarget';
import useIsomorphicLayoutEffectWithTarget from '../utils/useIsomorphicLayoutEffectWithTarget';
function useSize(target) {
  var _a = __read(useRafState(function () {
      var el = getTargetElement(target);
      return el ? {
        width: el.clientWidth,
        height: el.clientHeight
      } : undefined;
    }), 2),
    state = _a[0],
    setState = _a[1];
  useIsomorphicLayoutEffectWithTarget(function () {
    var el = getTargetElement(target);
    if (!el) {
      return;
    }
    var resizeObserver = new ResizeObserver(function (entries) {
      entries.forEach(function (entry) {
        var _a = entry.target,
          clientWidth = _a.clientWidth,
          clientHeight = _a.clientHeight;
        setState({
          width: clientWidth,
          height: clientHeight
        });
      });
    });
    resizeObserver.observe(el);
    return function () {
      resizeObserver.disconnect();
    };
  }, [], target);
  return state;
}
export default useSize;