@elastic/eui
Version:
Elastic UI Component Library
73 lines (72 loc) • 5.04 kB
JavaScript
import _createClass from "@babel/runtime/helpers/createClass";
import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
import _assertThisInitialized from "@babel/runtime/helpers/assertThisInitialized";
import _inherits from "@babel/runtime/helpers/inherits";
import _possibleConstructorReturn from "@babel/runtime/helpers/possibleConstructorReturn";
import _getPrototypeOf from "@babel/runtime/helpers/getPrototypeOf";
import _defineProperty from "@babel/runtime/helpers/defineProperty";
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
import { useEffect } from 'react';
import { EuiObserver } from '../observer';
export var EuiMutationObserver = /*#__PURE__*/function (_EuiObserver) {
_inherits(EuiMutationObserver, _EuiObserver);
var _super = _createSuper(EuiMutationObserver);
function EuiMutationObserver() {
var _this;
_classCallCheck(this, EuiMutationObserver);
for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
_this = _super.call.apply(_super, [this].concat(args));
_defineProperty(_assertThisInitialized(_this), "name", 'EuiMutationObserver');
// the `onMutation` prop may change while the observer is bound, abstracting
// it out into a separate function means the current `onMutation` value is used
_defineProperty(_assertThisInitialized(_this), "onMutation", function (records, observer) {
_this.props.onMutation(records, observer);
});
_defineProperty(_assertThisInitialized(_this), "beginObserve", function () {
var childNode = _this.childNode;
_this.observer = makeMutationObserver(childNode, _this.props.observerOptions, _this.onMutation);
});
return _this;
}
return _createClass(EuiMutationObserver);
}(EuiObserver);
var makeMutationObserver = function makeMutationObserver(node, _observerOptions, callback) {
// The MutationObserver polyfill used in Kibana (for Jest) implements
// an older spec in which specifying `attributeOldValue` or `attributeFilter`
// without specifying `attributes` results in a `SyntaxError`.
// The following logic patches the newer spec in which `attributes: true` can be
// implied when appropriate (`attributeOldValue` or `attributeFilter` is specified).
var observerOptions = _objectSpread({}, _observerOptions);
var needsAttributes = observerOptions.hasOwnProperty('attributeOldValue') || observerOptions.hasOwnProperty('attributeFilter');
if (needsAttributes && !observerOptions.hasOwnProperty('attributes')) {
observerOptions.attributes = true;
}
var observer = new MutationObserver(callback);
observer.observe(node, observerOptions);
return observer;
};
export var useMutationObserver = function useMutationObserver(container, callback, observerOptions) {
useEffect(function () {
if (container != null) {
var observer = makeMutationObserver(container, observerOptions, callback);
return function () {
return observer.disconnect();
};
}
},
// ignore changing observerOptions
// eslint-disable-next-line
[container, callback]);
};