``` function isMobile() { if (typeof this._isMobile === "boolean") { return this._isMobile; } var screenWidth = this.getScreenWidth(); var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var fixViewPortsExperimentRunning = fixViewPortsExperiment && fixViewPortsExperiment.toLowerCase() === "new"; if (!fixViewPortsExperiment) { if (!this.isAppleMobileDevice()) { screenWidth = screenWidth / window.devicePixelRatio; } } var isMobileScreenSize = screenWidth < 600; var isMobileUserAgent = false; this._isMobile = isMobileScreenSize && this.isTouchScreen(); return this._isMobile; } ``` > 下面是优酷网站内检测是否是移动端 ``` var isMobile = function(e) { var t = /AliApp|Yunos|cyclone/i.test(e) , n = /iPhone|iPad|iPod/i.test(e) , r = /Android/i.test(e) , a = /Windows Phone/i.test(e) || /IEMobile/i.test(e) || /WPDesktop/i.test(e) , o = /BlackBerry/i.test(e) , i = /Opera Mini/i.test(e); return t || n || r || a || o || i } ```