zarm/lib/utils/hooks/useMutationObserverRef/index.js

基于 React 的移动端UI库

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

var _typeof = require("@babel/runtime/helpers/typeof");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));

var React = _interopRequireWildcard(require("react"));

function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(e) { return e ? t : r; })(e); }

function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != _typeof(e) && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) { if ("default" !== u && {}.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } } return n.default = e, t && t.set(e, n), n; }

var config = {
  attributes: true,
  characterData: true,
  childList: true,
  subtree: true
};

var useMutationObserverRef = function useMutationObserverRef(callback) {
  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : config;

  var _React$useState = React.useState(null),
      _React$useState2 = (0, _slicedToArray2.default)(_React$useState, 2),
      target = _React$useState2[0],
      setTarget = _React$useState2[1];

  React.useEffect(function () {
    if (target) {
      var observer = new MutationObserver(callback);
      observer.observe(target, options);
      return function () {
        observer.disconnect();
      };
    }
  }, [target, callback, options]);
  return [target, setTarget];
};

var _default = useMutationObserverRef;
exports.default = _default;