2025-05-28 15:36:51 -07:00

41 lines
863 B
JavaScript

/*!
Copyright (c) 2015 Jed Watson.
Based on code that is Copyright 2013-2015, Facebook, Inc.
All rights reserved.
*/
/* global define */
(function () {
'use strict';
var canUseDOM = !!(
typeof window !== 'undefined' &&
window.document &&
window.document.createElement
);
var ExecutionEnvironment = {
canUseDOM: canUseDOM,
canUseWorkers: typeof Worker !== 'undefined',
canUseEventListeners:
canUseDOM && !!(window.addEventListener || window.attachEvent),
canUseViewport: canUseDOM && !!window.screen
};
if (typeof define === 'function' && typeof define.amd === 'object' && define.amd) {
define(function () {
return ExecutionEnvironment;
});
} else if (typeof module !== 'undefined' && module.exports) {
module.exports = ExecutionEnvironment;
} else {
window.ExecutionEnvironment = ExecutionEnvironment;
}
}());