rc-mutate-observer-modern/lib/MutateObserver.js

React MutateObserver Component

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _react = _interopRequireDefault(require("react"));
var _useLayoutEffect = _interopRequireDefault(require("rc-util/lib/hooks/useLayoutEffect"));
var _ref = require("rc-util/lib/ref");
var _findDOMNode = _interopRequireDefault(require("rc-util/lib/Dom/findDOMNode"));
var _useEvent = _interopRequireDefault(require("rc-util/lib/hooks/useEvent"));
var _wrapper = _interopRequireDefault(require("./wrapper"));
var _useMutateObserver = _interopRequireDefault(require("./useMutateObserver"));
const MutateObserver = props => {
  const {
    children,
    options,
    onMutate = () => {}
  } = props;
  const callback = (0, _useEvent.default)(onMutate);
  const wrapperRef = _react.default.useRef(null);
  const elementRef = _react.default.useRef(null);
  const canRef = /*#__PURE__*/_react.default.isValidElement(children) && (0, _ref.supportRef)(children);
  const mergedRef = (0, _ref.useComposeRef)(elementRef, canRef ? children.ref : null);
  const [target, setTarget] = _react.default.useState(null);
  (0, _useMutateObserver.default)(target, callback, options);

  // =========================== Effect ===========================
  // Bind target
  (0, _useLayoutEffect.default)(() => {
    setTarget((0, _findDOMNode.default)(elementRef.current) || (0, _findDOMNode.default)(wrapperRef.current));
  });

  // =========================== Render ===========================
  if (!children) {
    if (process.env.NODE_ENV !== 'production') {
      console.error('MutationObserver need children props');
    }
    return null;
  }
  return /*#__PURE__*/_react.default.createElement(_wrapper.default, {
    ref: wrapperRef
  }, canRef ? /*#__PURE__*/_react.default.cloneElement(children, {
    ref: mergedRef
  }) : children);
};
var _default = exports.default = MutateObserver;