@elastic/eui
Version:
Elastic UI Component Library
80 lines (79 loc) • 7.73 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.useMutationObserver = exports.EuiMutationObserver = void 0;
var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
var _assertThisInitialized2 = _interopRequireDefault(require("@babel/runtime/helpers/assertThisInitialized"));
var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));
var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));
var _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _react = require("react");
var _observer = require("../observer");
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) { (0, _defineProperty2.default)(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 = (0, _getPrototypeOf2.default)(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = (0, _getPrototypeOf2.default)(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return (0, _possibleConstructorReturn2.default)(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.
*/
var EuiMutationObserver = /*#__PURE__*/function (_EuiObserver) {
(0, _inherits2.default)(EuiMutationObserver, _EuiObserver);
var _super = _createSuper(EuiMutationObserver);
function EuiMutationObserver() {
var _this;
(0, _classCallCheck2.default)(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));
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_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
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "onMutation", function (records, observer) {
_this.props.onMutation(records, observer);
});
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "beginObserve", function () {
var childNode = _this.childNode;
_this.observer = makeMutationObserver(childNode, _this.props.observerOptions, _this.onMutation);
});
return _this;
}
return (0, _createClass2.default)(EuiMutationObserver);
}(_observer.EuiObserver);
exports.EuiMutationObserver = EuiMutationObserver;
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;
};
var useMutationObserver = function useMutationObserver(container, callback, observerOptions) {
(0, _react.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]);
};
exports.useMutationObserver = useMutationObserver;