Requires: //cdnjs.cloudflare.com/ajax/libs/modernizr/2.7.1/modernizr.min.js

device.js

var device = {
	touch: false,
	mobile: false,
	over: '',
	out: '',
	retina: false,
	transitions: false,
	android: false
};
 
function registerDevice() {
	var suffix = '@2x';
	var density = (window.devicePixelRatio === undefined) ? 1 : window.devicePixelRatio;
	if (density > 1) {
		$('body').addClass('retina');
		device.retina = true;
	}
	device.transitions = Modernizr.csstransitions;
	device.transforms = Modernizr.csstransforms;
	device.transforms3d = Modernizr.csstransforms3d;
	device.animations = Modernizr.cssanimations;
	if ((navigator.userAgent.toLowerCase().indexOf('android') != -1)) device.android = true;
	if ((navigator.userAgent.indexOf('iPhone') != -1) || (navigator.userAgent.indexOf('iPod') != -1) || (navigator.userAgent.indexOf('BlackBerry') != -1) || (navigator.userAgent.indexOf('Windows Phone') != -1) || (navigator.userAgent.toLowerCase().indexOf('android') != -1) && (navigator.userAgent.toLowerCase().indexOf('mobile') != -1)) {
		$('body').addClass('mobile');
		device.mobile = true;
	}
	if ((navigator.userAgent.indexOf('iPhone') != -1) || (navigator.userAgent.indexOf('iPod') != -1) || (navigator.userAgent.indexOf('BlackBerry') != -1) || (navigator.userAgent.indexOf('Windows Phone') != -1) || (navigator.userAgent.toLowerCase().indexOf('android') != -1) || (navigator.userAgent.indexOf('iPad') != -1)) {
		$('body').addClass('touchscreen');
		device.touch = true;
	}
	if (device.touch) {
		device.over = window.navigator.msPointerEnabled ? "MSPointerDown" : "touchstart";
		device.out = window.navigator.msPointerEnabled ? "MSPointerUp" : "touchend";
		device.instaClick = window.navigator.msPointerEnabled ? "MSPointerDown" : "touchstart";
	} else {
		device.over = 'mouseenter';
		device.out = 'mouseleave';
		device.instaClick = 'click'
	}
	if (!device.touch) $('body').addClass('desktop');
};