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
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(?: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 "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 (?: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;
})();
再给大家一个简单点的实例：判断windows、linux、android