/**
* @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.Languages');
goog.require('shaka.polyfill.register');
/**
* @namespace shaka.polyfill.Languages
*
* @summary A polyfill to provide navigator.languages on all browsers.
* This is necessary for IE and possibly others we have yet to discover.
*/
/**
* Install the polyfill if needed.
*/
shaka.polyfill.Languages.install = function() {
if (navigator.languages) {
// No need.
return;
}
Object.defineProperty(navigator, 'languages', {
get: () => {
// If the browser provides a single language (all that we've seen), then
// make an array out of that. Otherwise, return English.
if (navigator.language) {
return [navigator.language];
}
return ['en'];
},
});
};
shaka.polyfill.register(shaka.polyfill.Languages.install);