JSFiddle - React, Tailwind, and code Playground

by twobin

HTML

<title> JavaScript高级程序设计-客户端检测 </title>
<body>
</body>

JavaScript

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,
        xll: 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.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:([^\)]+)\)...