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frontend/node_modules/@rc-component/mutate-observer/es/MutateObserver.js

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+import _slicedToArray from "@babel/runtime/helpers/esm/slicedToArray";
+import React from 'react';
+import useLayoutEffect from "rc-util/es/hooks/useLayoutEffect";
+import { supportRef, useComposeRef } from "rc-util/es/ref";
+import findDOMNode from "rc-util/es/Dom/findDOMNode";
+import useEvent from "rc-util/es/hooks/useEvent";
+import DomWrapper from "./wrapper";
+import useMutateObserver from "./useMutateObserver";
+var MutateObserver = function MutateObserver(props) {
+  var children = props.children,
+    options = props.options,
+    _props$onMutate = props.onMutate,
+    onMutate = _props$onMutate === void 0 ? function () {} : _props$onMutate;
+  var callback = useEvent(onMutate);
+  var wrapperRef = React.useRef(null);
+  var elementRef = React.useRef(null);
+  var canRef = /*#__PURE__*/React.isValidElement(children) && supportRef(children);
+  var mergedRef = useComposeRef(elementRef, canRef ? children.ref : null);
+  var _React$useState = React.useState(null),
+    _React$useState2 = _slicedToArray(_React$useState, 2),
+    target = _React$useState2[0],
+    setTarget = _React$useState2[1];
+  useMutateObserver(target, callback, options);
+
+  // =========================== Effect ===========================
+  // Bind target
+  useLayoutEffect(function () {
+    setTarget(findDOMNode(elementRef.current) || findDOMNode(wrapperRef.current));
+  });
+
+  // =========================== Render ===========================
+  if (!children) {
+    if (process.env.NODE_ENV !== 'production') {
+      console.error('MutationObserver need children props');
+    }
+    return null;
+  }
+  return /*#__PURE__*/React.createElement(DomWrapper, {
+    ref: wrapperRef
+  }, canRef ? /*#__PURE__*/React.cloneElement(children, {
+    ref: mergedRef
+  }) : children);
+};
+export default MutateObserver;