js判斷瀏覽器大全

今天看見有人發了個js判斷瀏覽器，其實在ext裏有很好的判斷瀏覽器的代碼，而且可以說是大全，呵呵

代碼在ext裏的src/core/ext.js下

最新的ext3.0beat1的代碼如下：

var idSeed = 0,
        ua = navigator.userAgent.toLowerCase(),
        check = function(r){
            return r.test(ua);
        },
        isStrict = document.compatMode == "CSS1Compat",
        isOpera = check(/opera/),
        isChrome = check(/chrome/),
        isWebKit = check(/webkit/),
        isSafari = !isChrome && check(/safari/),
        isSafari3 = isSafari && check(/version//3/),
        isSafari4 = isSafari && check(/version//4/),
        isIE = !isOpera && check(/msie/),
        isIE7 = isIE && check(/msie 7/),
        isIE8 = isIE && check(/msie 8/),
        isGecko = !isWebKit && check(/gecko/),
        isGecko3 = isGecko && check(/rv:1/.9/),
        isBorderBox = isIE && !isStrict,
        isWindows = check(/windows|win32/),
        isMac = check(/macintosh|mac os x/),
        isAir = check(/adobeair/),
        isLinux = check(/linux/),
        isSecure = /^https/i.test(window.location.protocol);

其中的 idSeed變量沒有用到可以去除，在這只是保證這句的完整放在這裏。

 

而2.2.1下（在source/core/ext.js裏）的爲

var ua = navigator.userAgent.toLowerCase();

    var isStrict = document.compatMode == "CSS1Compat",
        isOpera = ua.indexOf("opera") > -1,
        isChrome = ua.indexOf("chrome") > -1,
        isSafari = !isChrome && (/webkit|khtml/).test(ua),
        isSafari3 = isSafari && ua.indexOf('webkit/5') != -1,
        isIE = !isOpera && ua.indexOf("msie") > -1,
        isIE7 = !isOpera && ua.indexOf("msie 7") > -1,
        isIE8 = !isOpera && ua.indexOf("msie 8") > -1,
        isGecko = !isSafari && !isChrome && ua.indexOf("gecko") > -1,
        isGecko3 = isGecko && ua.indexOf("rv:1.9") > -1,
        isBorderBox = isIE && !isStrict,
        isWindows = (ua.indexOf("windows") != -1 || ua.indexOf("win32") != -1),
        isMac = (ua.indexOf("macintosh") != -1 || ua.indexOf("mac os x") != -1),
        isAir = (ua.indexOf("adobeair") != -1),
        isLinux = (ua.indexOf("linux") != -1),
        isSecure = window.location.href.toLowerCase().indexOf("https") === 0;

 

呵呵，看別人優秀的源代碼是學習的最好捷徑。

注：後幾句是判斷操作系統。相信您能看出來。