基於javascript程式碼偵測造訪網頁的瀏覽器呈現引擎、平台、Windows作業系統、行動裝置和遊戲系統_javascript技巧

废话不多说了，直接给大家贴js代码了，代码附有注释，感兴趣的朋友一起学习吧。

/**
 * Author: laixiangran.
 * Created by laixiangran on 2015/12/02.
 * 检测访问网页的浏览器呈现引擎、平台、Windows操作系统、移动设备和游戏系统
 * ********************************************************************
 * 各版本浏览器在windows10.0下的用户代理字符串：
 * Google Chrome 45.0.2454.85 —— "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.36"
 * Opera 31.0.1889.174 —— "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36 OPR/31.0.1889.174"
 * Microsoft Edge —— "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240"
 * Firefox 40.0.3 —— "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0"
 * Internet Explorer 11+ —— "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; rv:11.0) like Gecko"
 * Internet Explorer 10- —— "Mozilla/5.0 (compatible; MSIE x.0; Windows NT 10.0; WOW64; Trident/8.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729)"
 */
(function(){
 window.iClient = {};
 //呈现引擎信息
 var engine = {
 //呈现引擎
 ie: 0,
 gecko: 0,
 webkit: 0,
 khtml: 0,
 opera:0,
 //具体版本号
 ver: null
 };
 var browser = {
 //浏览器
 ie: 0,
 edge: 0,
 firefox: 0,
 safari: 0,
 konq: 0,
 opera: 0,
 chrome: 0,
 //具体版本号
 ver: null
 };
 //平台、设备和操作系统
 var system = {
 win: false,
 mac: false,
 unix: 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, //任天堂
 ps: false //Playstation3
 };
 //获取浏览器的用户代理字符串
 var ua = window.navigator.userAgent;
 //检测呈现引擎和浏览器
 //检测Presto内核的Opera浏览器
 if(window.opera){
 engine.ver = browser.ver = window.opera.version();
 engine.opera = browser.opera = parseFloat(engine.ver);
 }
 //检测WebKit 用代理字符串中的"AppleWebKit"进行检测
 else if(/AppleWebKit\/(\S+)/.test(ua)){
 engine.ver = RegExp["$1"];
 engine.webkit = parseFloat(engine.ver);
 //确定Microsoft Edge
 if(/Edge\/(\S+)/.test(ua)){
  browser.ver = RegExp["$1"];
  browser.edge = parseFloat(browser.ver);
 }
 //确定WebKit内核Opera
 else if(/OPR\/(\S+)/.test(ua)){
  browser.ver = RegExp["$1"];
  browser.opera = parseFloat(browser.ver);
 }
 //确定Chrome
 else if(/Chrome\/(\S+)/.test(ua)){
  browser.ver = RegExp["$1"];
  browser.chrome = parseFloat(browser.ver);
 }
 //确定Safari
 else if(/Version\/(\S+)/.test(ua)){
  browser.ver = RegExp["$1"];
  browser.safari = parseFloat(browser.ver);
 }else{
  //近似的确定版本号
  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.ver = browser.safari = safariVersion;
 }
 }
 //检测KHTML 用于Konqueror3.1及更早版本中不包含KHTML的版本，故而就要使用Konqueror的版本来代替
 else if(/KHTML\/(\S+)/.test(ua) || /Konqueror\/(\S+)/.test(ua)){
 engine.ver = browser.ver = RegExp["$1"];
 engine.khtml = browser.konq = parseFloat(engine.ver);s
 }
 //检测Gecko 其版本号在字符串"rv:"的后面
 else if(/rv:([^\)]+)\) Gecko\/\d{8}/.test(ua)){
 engine.ver = RegExp["$1"];
 engine.gecko = parseFloat(engine.ver);
 //确定Firefox
 if(/Firefox\/(\S+)/.test(ua)){
  browser.ver = RegExp["$1"];
  browser.firefox = parseFloat(browser.ver);
 }
 }
 //检测IE
 else if(/MSIE ([^;]+)/.test(ua) || /rv:([^\)]+)\) like Gecko/.test(ua)){
 engine.ver = browser.ver = RegExp["$1"];
 engine.ie = browser.ie = parseFloat(engine.ver);
 }
 //获取平台或者操作系统信息,可能的值：win32、win64、MacPPC、MacIntel、Xll、Linux i686
 var p = window.navigator.platform;
 //检测平台
 system.win = p.indexOf("Win") == 0;
 system.mac = p.indexOf("Mac") == 0;
 system.unix = (p == "Xll'") || (p.indexOf("Linux") == 0);
 //检测Windows操作系统
 if(system.win){
 if(/Win(&#63;:dows )&#63;([^do]{2})\s&#63;(\d+\.\d+)&#63;/.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 "7":
   system.win = "7";
   break;
   case "8":
   system.win = "8";
   break;
   case "8.1":
   system.win = "8.1";
   break;
   case "10.0":
   system.win = "10.0";
   break;
   default:
   system.win = "NT";
   break;
  }
  }
 }
 }
 //移动设备
 system.iphone = ua.indexOf("iPhone") > -1;
 system.ipod = ua.indexOf("iPod") > -1;
 system.ipad = ua.indexOf("iPad") > -1;
 system.nokiaN = ua.indexOf("NokiaN") > -1;
 //window 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 (&#63;:iPhone )&#63;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
 }
 }
 //检测安卓版本
 if(/Android (\d+.\d+)/.test(ua)){
 system.android = parseFloat(RegExp["$1"]);
 }
 //检测游戏系统
 system.wii = ua.indexOf("wii") > -1;
 system.ps = /playstation/i.test(ua);
 window.iClient.engine = engine;
 window.iClient.browser = browser;
 window.iClient.system = system;
})(); 

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