https://biblewebapp.com/study-v2/js/docs/docs.detection.js

1
2/**
3 * Feature/brower/OS detection
4 *
5 * @author John Dyer (http://j.hn/)
6 */
7
8docs.Features = (function() {
9	var
10		t = {},
11		d = document,
12		nav = navigator,
13		ua = nav.userAgent.toLowerCase();
14
15	// detect browsers (only the ones that have some kind of quirk we need to work around)
16	t.isiPad = (ua.match(/ipad/i) !== null);
17	t.isiPhone = (ua.match(/iphone/i) !== null);
18	t.isiOS = t.isiPhone || t.isiPad;
19	t.isAndroid = (ua.match(/android/i) !== null);
20	t.isIE = (nav.appName.toLowerCase().indexOf("microsoft") != -1);
21	t.isChrome = (ua.match(/chrome/gi) !== null);
22	t.isFirefox = (ua.match(/firefox/gi) !== null);
23	t.isWebkit = (ua.match(/webkit/gi) !== null);
24	t.isOpera = (ua.match(/opera/gi) !== null);
25	t.hasTouch = ('ontouchstart' in window);
26	
27	// Webkit/firefox
28	t.hasWebkitNativeFullScreen = (typeof d.webkitRequestFullScreen !== 'undefined');
29	t.hasMozNativeFullScreen = (typeof d.mozRequestFullScreen !== 'undefined');
30	
31	t.hasTrueNativeFullScreen = (t.hasWebkitNativeFullScreen || t.hasMozNativeFullScreen);
32	t.nativeFullScreenEnabled = t.hasTrueNativeFullScreen;
33	if (t.hasMozNativeFullScreen) {
34		t.nativeFullScreenEnabled = d.mozFullScreenEnabled;
35	}
36	
37	if (t.hasTrueNativeFullScreen) {
38		t.fullScreenEventName = (t.hasWebkitNativeFullScreen) ? 'webkitfullscreenchange' : 'mozfullscreenchange';
39		
40		
41		t.isFullScreen = function() {
42			if (d.mozRequestFullScreen) {
43				return d.mozFullScreen;
44			} else if (d.webkitRequestFullScreen) {
45				return d.webkitIsFullScreen;
46			} else {
47				return false;
48			}
49		}
50				
51		t.requestFullScreen = function(el) {
52	
53			if (t.hasWebkitNativeFullScreen) {
54				el.webkitRequestFullScreen();
55			} else if (t.hasMozNativeFullScreen) {
56				el.mozRequestFullScreen();
57			}
58		}
59		
60		t.cancelFullScreen = function() {				
61			if (t.hasWebkitNativeFullScreen) {
62				document.webkitCancelFullScreen();
63			} else if (t.hasMozNativeFullScreen) {
64				document.mozCancelFullScreen();
65			}
66		}	
67		
68	}
69	
70	return t;
71})();