https://www.yamakosa.com/shared/js/base.js

1function define(name, value) {
2	Object.defineProperty(window, name, {
3		get: function() {
4			return value;
5		},
6		set: function() {
7			throw (name + " is a constant and can't be redeclared.");
8		}
9	});
10}
11function defined(name) {
12	if (window[name]) return true;
13	else return false;
14}
15
16define("FCBase", {});
17
18FCBase.isFunction = function(fn, checkEmpty) {
19	// if (fn && fn.constructor == Function) return checkEmpty ? (fn.toString().trim().replace(/\s+/g, "").replace(/^function\s*[^(]*\(\)[ ]*{(.*)}$/gi, "").trim() !== "") : true;
20	if (fn && fn.constructor == Function) return checkEmpty ? (fn.toString().replace(/(\/\*[\w\'\-\;\s\r\n\*]*\*\/)|(^\s*\/\/[^\n]*$\s*)|(^\s*<!--[^\-\-\>]*\s*-->\s*$\s*)/gim, "").replace(/\r*\n+/g, "").replace(/^function\s*[^(]*\([^\)]*\)\s*\{/gi, "").trim().replace(/\}$/, "").trim() !== "") : true;
21
22	return false;
23};
24
25FCBase.device = {
26	userAgent: function(lower) {
27		return lower ? navigator.userAgent.toLowerCase() : navigator.userAgent;
28	},
29	iPhone: function() {
30		return ((navigator.platform.indexOf("iPhone") != -1) || (navigator.platform.indexOf("iPod") != -1));
31	},
32	iPad: function () {
33		return (navigator.platform.indexOf("iPad") != -1);
34	},
35	iOS: function() {
36		return (this.iPhone() || this.iPad());
37	},
38	androidMobile: function() {
39		return ((this.userAgent(true).indexOf("android") > -1) && this.userAgent(true).indexOf("mobile"));
40	},
41	androidTablet: function() {
42		return ((this.userAgent(true).indexOf("android") > -1) && !(this.userAgent(true).indexOf("mobile")));
43	},
44	android: function() {
45		return (this.androidMobile() || this.androidTablet());
46	},
47	blackBerry: function() {
48		return (this.userAgent(true).indexOf("blackberry") > -1);
49	},
50	opera: function() {
51		return (this.userAgent(true).indexOf("opera mini") > -1);
52	},
53	windows: function() {
54		return (this.userAgent(true).indexOf("iemobile") > -1);
55	},
56	touch: function() {
57		try {
58			document.createEvent("TouchEvent");
59			return true;
60		}
61		catch(e){
62			return false;
63		}
64	},
65	tablet: function() {
66		return (this.iPad() || this.androidTablet());
67	},
68	mobile: function() {
69		return (this.iOS() || this.android() || this.blackberry() || this.opera() || this.windows() || this.touch());
70	},
71	desktop: function() {
72		return (!this.mobile());
73	},
74	portrait: function() {
75		return (window.innerHeight > window.innerWidth);
76	},
77	landscape: function() {
78		return ((window.orientation === 90) || (window.orientation === -90));
79	}
80};