planning

node_modules/exenv/index.js

@@ -0,0 +1,40 @@
+/*!
+  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;
+	}
+
+}());