Yuri Kuznetsov
75 lines
2.3 KiB
JavaScript
75 lines
2.3 KiB
JavaScript
/************************************************************************
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* This file is part of EspoCRM.
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*
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* EspoCRM – Open Source CRM application.
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* Copyright (C) 2014-2025 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
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* Website: https://www.espocrm.com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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* The interactive user interfaces in modified source and object code versions
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* of this program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU Affero General Public License version 3.
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*
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* In accordance with Section 7(b) of the GNU Affero General Public License version 3,
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* these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
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************************************************************************/
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/** @module broadcast-channel */
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class BroadcastChannel {
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constructor() {
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this.object = null;
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if (window.BroadcastChannel) {
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this.object = new window.BroadcastChannel('app');
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}
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}
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/**
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* Post a message.
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*
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* @param {string} message A message.
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*/
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postMessage(message) {
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if (!this.object) {
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return;
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}
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this.object.postMessage(message);
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}
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/**
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* @callback module:broadcast-channel~callback
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*
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* @param {MessageEvent} event An event. A message can be obtained from the `data` property.
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*/
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/**
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* Subscribe to a message.
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*
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* @param {module:broadcast-channel~callback} callback A callback.
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*/
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subscribe(callback) {
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if (!this.object) {
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return;
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}
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this.object.addEventListener('message', callback);
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}
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}
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export default BroadcastChannel;
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