JavaScript - 用戶端檢測

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《JavaScript進階程式設計》上down的，檢測呈現引擎、平台、作業系統、行動裝置、遊戲系統 的檢測指令碼。

var client = function(){    //rendering engines    var engine = {                    ie: 0,        gecko: 0,        webkit: 0,        khtml: 0,        opera: 0,        //complete version        ver: null      };        //browsers    var browser = {                //browsers        ie: 0,        firefox: 0,        safari: 0,        konq: 0,        opera: 0,        chrome: 0,        //specific version        ver: null    };        //platform/device/OS    var system = {        win: false,        mac: false,        x11: false,                //mobile devices        iphone: false,        ipod: false,        ipad: false,        ios: false,        android: false,        nokiaN: false,        winMobile: false,                //game systems        wii: false,        ps: false     };        //detect rendering engines/browsers    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);                //figure out if it‘s Chrome or 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 {            //approximate version            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);                //determine if it‘s 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);    }        //detect browsers    browser.ie = engine.ie;    browser.opera = engine.opera;        //detect platform    var p = navigator.platform;    system.win = p.indexOf("Win") == 0;    system.mac = p.indexOf("Mac") == 0;    system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);    //detect windows operating systems    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"];            }        }    }        //mobile devices    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"]);        }    }            //determine iOS version    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;  //can‘t really detect - so guess        }    }        //determine Android version    if (/Android (\d+\.\d+)/.test(ua)){        system.android = parseFloat(RegExp.$1);    }        //gaming systems    system.wii = ua.indexOf("Wii") > -1;    system.ps = /playstation/i.test(ua);        //return it    return {        engine:     engine,        browser:    browser,        system:     system            };}();

JavaScript - 用戶端檢測