@elastic/eui
Version:
Elastic UI Component Library
78 lines (76 loc) • 6.11 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.EuiObserver = void 0;
var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
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");
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 EuiObserver = /*#__PURE__*/function (_Component) {
(0, _inherits2.default)(EuiObserver, _Component);
var _super = _createSuper(EuiObserver);
function EuiObserver() {
var _this;
(0, _classCallCheck2.default)(this, EuiObserver);
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", 'EuiObserver');
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "childNode", null);
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "observer", null);
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "updateChildNode", function (ref) {
if (_this.childNode === ref) return; // node hasn't changed
// if there's an existing observer disconnect it
if (_this.observer != null) {
_this.observer.disconnect();
_this.observer = null;
}
_this.childNode = ref;
if (_this.childNode != null) {
_this.beginObserve();
}
});
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "beginObserve", function () {
throw new Error('EuiObserver has no default observation method');
});
return _this;
}
(0, _createClass2.default)(EuiObserver, [{
key: "componentDidMount",
value: function componentDidMount() {
if (this.childNode == null) {
throw new Error("".concat(this.name, " did not receive a ref"));
}
}
}, {
key: "componentWillUnmount",
value: function componentWillUnmount() {
if (this.observer != null) {
this.observer.disconnect();
}
}
}, {
key: "render",
value: function render() {
var props = this.props;
return props.children(this.updateChildNode);
}
}]);
return EuiObserver;
}(_react.Component);
exports.EuiObserver = EuiObserver;