/**
* @license
* Copyright 2016 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
goog.provide('shaka.polyfill.VideoPlayPromise');
goog.require('shaka.log');
goog.require('shaka.polyfill.register');
/**
* @namespace shaka.polyfill.VideoPlayPromise
*
* @summary A polyfill to silence the play() Promise in HTML5 video.
*/
/**
* Install the polyfill if needed.
*/
shaka.polyfill.VideoPlayPromise.install = function() {
shaka.log.debug('VideoPlayPromise.install');
if (window.HTMLMediaElement) {
const originalPlay = HTMLMediaElement.prototype.play;
HTMLMediaElement.prototype.play = function() {
let p = originalPlay.apply(this, arguments);
if (p) {
// This browser is returning a Promise from play().
// If the play() call fails or is interrupted, the Promise will be
// rejected. Some apps, however, don't listen to this Promise,
// especially since it is not available cross-browser. If the Promise
// is rejected without anyone listening for the failure, an error will
// appear in the JS console.
// To avoid confusion over this innocuous "error", we will install a
// catch handler on the Promise. This does not prevent the app from
// also catching failures and handling them. It only prevents the
// console message.
p.catch(function() {});
}
return p;
};
}
};
shaka.polyfill.register(shaka.polyfill.VideoPlayPromise.install);