tdesign-react/lib/hooks/useMutationObserver.js

TDesign Component for React

/**
 * tdesign v1.15.1
 * (c) 2025 tdesign
 * @license MIT
 */

import { useRef, useEffect } from 'react';
import { isEqual, debounce } from 'lodash-es';
import useLatest from './useLatest.js';

var DEFAULT_OPTIONS = {
  debounceTime: 0,
  config: {
    attributes: true,
    childList: true,
    characterData: true,
    subtree: true
  }
};
function useMutationObservable(targetEl, cb) {
  var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : DEFAULT_OPTIONS;
  var optionsRef = useRef(null);
  var signalRef = useRef(0);
  var callbackRef = useLatest(cb);
  if (!isEqual(options, optionsRef.current)) {
    signalRef.current += 1;
  }
  optionsRef.current = options;
  useEffect(function () {
    if (!targetEl || !(targetEl !== null && targetEl !== void 0 && targetEl.nodeType)) return;
    var observer = null;
    try {
      var _optionsRef$current = optionsRef.current,
        debounceTime = _optionsRef$current.debounceTime,
        config = _optionsRef$current.config;
      var mutationCallback = function mutationCallback() {
        callbackRef.current.apply(callbackRef, arguments);
      };
      observer = new MutationObserver(debounceTime > 0 ? debounce(mutationCallback, debounceTime) : mutationCallback);
      observer.observe(targetEl, config);
    } catch (e) {
      console.error(e);
    }
    return function () {
      if (observer) {
        observer.disconnect();
        observer = null;
      }
    };
  }, [targetEl, signalRef.current]);
}

export { useMutationObservable as default };
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