commonJS — 浏览器操作（for Browser）

for Browser

代码

/**
* Created by laixiangran on 2016/1/24
* homepage：http://www.cnblogs.com/laixiangran/
* for Browser
*/

(function(undefined) {

var com = window.COM = window.COM || {};

var $B = com.$B = {};

// 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);

if (browser.ver == 6) {
try {
document.execCommand("BackgroundImageCache", false, true);
} catch(e) {}
}

$B.engine = engine;
$B.browser = browser;
$B.system = system;
}());

参考