mobile browser UA/feature detection sniffing

gistfile1.txt

var ua = navigator.userAgent.toLowerCase(),
    isOpera = !!window.opera || ua.indexOf(' opr/') >= 0,
    isChrome = !!window.chrome && !isOpera,
    isAndroid = ua.indexOf("android") > -1,
		iOS = /(ipad|iphone|ipod)/g.test(ua),
		isHandheld = window.matchMedia && window.matchMedia('(max-device-width: 960px)').matches || screen.width <= 960,
		isTouchDevice = 'ontouchstart' in window || 'onmsgesturechange' in window,
		isMobile = (isHandheld && isTouchDevice) && (isAndroid || iOS);

        var ua = navigator.userAgent.toLowerCase(),
            isOpera = !!window.opera || ua.indexOf(' opr/') >= 0,
            isChrome = !!window.chrome && !isOpera,
            isAndroid = ua.indexOf("android") > -1,
            iOS = /(ipad|iphone|ipod)/g.test(ua),
            isWM = ua.match(/IEMobile/i) || ua.match(/WPDesktop/i),
            isMobileBrowser = ua.match(/Mobi/i),
            //feature detect
            isOrientation = typeof window.orientation !== 'undefined',
            isHandheld = window.matchMedia && window.matchMedia('(max-device-width: 960px)').matches || screen.width <= 960,
            isTouchDevice = 'ontouchstart' in window || 'onmsgesturechange' in window,//Modernizr.touch
            isMobile = (isOrientation && isHandheld && isTouchDevice) && (isAndroid || iOS || isWM) && isMobileBrowser;