facebook sdk mobile detect

detect.js

// extracted from all.js on nov 26th 2015
var h = navigator.userAgent,
   i = {
     iphone: /\b(iPhone|iP[ao]d)/.test(h),
     ipad: /\b(iP[ao]d)/.test(h),
     android: /Android/i.test(h),
     nativeApp: /FBAN\/\w+;/i.test(h),
     mobile: /Mobile/i.test(h)
   };
isMobile = i.iphone || i.ipad || i.android || i.mobile;