浏览器检测代码

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/csdnlinyongsheng/article/details/86228829

var client = function(){
			 //呈现引擎
			 var engine = {
				 ie: 0,
				 gecko: 0,
				 webkit: 0,
				 khtml: 0,
				 opera: 0,

				 //完整的版本号
				 ver: null
			 };
			 //浏览器
			 var browser = {

				 //主要浏览器
				 ie: 0,
				 firefox: 0,
				 safari: 0,
				 konq: 0,
				 opera: 0, 
				 chrome: 0,

				 //具体的版本号
				 ver: null
				 };
				 //平台、设备和操作系统
				 var system = {
				 win: false,
				 mac: false,
				 x11: false,

				 //移动设备
				 iphone: false,
				 ipod: false,
				 ipad: false,
				 ios: false,
				 android: false,
				 nokiaN: false,
				 winMobile: false,

				 //游戏系统
				 wii: false,
				 ps: false
			 };

			 //检测呈现引擎和浏览器
			var ua = navigator.userAgent;
			if (window.opera){
				 engine.ver = browser.ver = window.opera.version();
				 engine.opera = browser.opera = parseFloat(engine.ver);
			} 
			else if (/AppleWebKit\/(\S+)/.test(ua)){
				engine.ver = RegExp["$1"];
				engine.webkit = parseFloat(engine.ver);

				 //确定是 Chrome 还是 Safari
				 if (/Chrome\/(\S+)/.test(ua)){
					 browser.ver = RegExp["$1"];
					 browser.chrome = parseFloat(browser.ver);
				 } 
				 else if (/Version\/(\S+)/.test(ua)){
					 browser.ver = RegExp["$1"];
					 browser.safari = parseFloat(browser.ver);
				 } 
				 else {
				 //近似地确定版本号
					 var safariVersion = 1;
					 if (engine.webkit < 100){
					 	safariVersion = 1;
					 } else if (engine.webkit < 312){
					 	safariVersion = 1.2;
					 } else if (engine.webkit < 412){
					 	safariVersion = 1.3;
					 } else {
					 	safariVersion = 2;
					 }

					 browser.safari = browser.ver = safariVersion;
				}
			} 
			else if (/KHTML\/(\S+)/.test(ua) || /Konqueror\/([^;]+)/.test(ua)){
				 engine.ver = browser.ver = RegExp["$1"];
				 engine.khtml = browser.konq = parseFloat(engine.ver);
			} 
			else if (/rv:([^\)]+)\) Gecko\/\d{8}/.test(ua)){
				 engine.ver = RegExp["$1"];
				 engine.gecko = parseFloat(engine.ver);

				 //确定是不是 Firefox
				 if (/Firefox\/(\S+)/.test(ua)){
					 browser.ver = RegExp["$1"];
					 browser.firefox = parseFloat(browser.ver);
				 }
			} 
			else if (/MSIE ([^;]+)/.test(ua)){
				 engine.ver = browser.ver = RegExp["$1"];
				 engine.ie = browser.ie = parseFloat(engine.ver);
			 }
			 //检测浏览器
			 browser.ie = engine.ie;
			 browser.opera = engine.opera;
			 //检测平台
			 var p = navigator.platform;
			 system.win = p.indexOf("Win") == 0;
			 system.mac = p.indexOf("Mac") == 0;
			 system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);
			 //检测 Windows 操作系统
			 if (system.win){
				if (/Win(?:dows )?([^do]{2})\s?(\d+\.\d+)?/.test(ua)){
					 if (RegExp["$1"] == "NT"){
						 switch(RegExp["$2"]){
						 case "5.0":
						 	system.win = "2000";
						 break;
						 case "5.1":
						 	system.win = "XP";
						 break;
						 case "6.0":
						 	system.win = "Vista";
						 break;
						 case "6.1":
						 	system.win = "7";
						 break;
						 default:
						 	system.win = "NT";
						 break;
					 }
			 	} 
				else if (RegExp["$1"] == "9x"){
				 	system.win = "ME";
				} else {
				 	system.win = RegExp["$1"];
				}
			 }
		}
		 system.iphone = ua.indexOf("iPhone") > -1;
		 system.ipod = ua.indexOf("iPod") > -1;
		 system.ipad = ua.indexOf("iPad") > -1;
		 system.nokiaN = ua.indexOf("NokiaN") > -1;
		 //windows mobile
		 if (system.win == "CE"){
		 system.winMobile = system.win;
		 } else if (system.win == "Ph"){
		 if(/Windows Phone OS (\d+.\d+)/.test(ua)){;
		 system.win = "Phone";
		 system.winMobile = parseFloat(RegExp["$1"]);
		 }
		 }

		 //检测 iOS 版本
		 if (system.mac && ua.indexOf("Mobile") > -1){
		 if (/CPU (?:iPhone )?OS (\d+_\d+)/.test(ua)){
		 system.ios = parseFloat(RegExp.$1.replace("_", "."));
		 } else {
		 system.ios = 2; //不能真正检测出来，所以只能猜测
		 }
		 }
		 //检测 Android 版本
		 if (/Android (\d+\.\d+)/.test(ua)){
		 system.android = parseFloat(RegExp.$1);
		 }
		 //游戏系统
		 system.wii = ua.indexOf("Wii") > -1;
		 system.ps = /playstation/i.test(ua);
		 //返回这些对象
		 return {
			 engine: engine,
			 browser: browser,
			 system: system
		 };
		}; 
		console.log(client());