以下是2016年Rob的答案调整版本，包括Microsoft Edge和Blink检测:

(编辑:我用这些信息更新了Rob的答案。)

// Opera 8.0+ (UA detection to detect Blink/v8-powered Opera) isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0; // Firefox 1.0+ isFirefox = typeof InstallTrigger !== 'undefined'; // Safari 3.0+ isSafari = /constructor/i.test(window.HTMLElement) || (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window['safari'] || safari.pushNotification); // Internet Explorer 6-11 isIE = /*@cc_on!@*/false || !!document.documentMode; // Edge 20+ isEdge = !isIE && !!window.StyleMedia; // Chrome 1+ isChrome = !!window.chrome && !!window.chrome.webstore; // Blink engine detection isBlink = (isChrome || isOpera) && !!window.CSS; /* Results: */ console.log("isOpera", isOpera); console.log("isFirefox", isFirefox); console.log("isSafari", isSafari); console.log("isIE", isIE); console.log("isEdge", isEdge); console.log("isChrome", isChrome); console.log("isBlink", isBlink);

这种方法的美妙之处在于它依赖于浏览器引擎属性，因此它甚至涵盖了衍生浏览器，如Yandex或Vivaldi，这些浏览器实际上与它们所使用的引擎的主要浏览器兼容。例外是Opera，它依赖于用户代理嗅探，但是今天(即ver。15岁及以上)甚至Opera本身也只是Blink的一个外壳。

在这里您可以找到它正在运行的浏览器。

function isValidBrowser(navigator){

            var isChrome =  navigator.indexOf('chrome'),
            isFireFox= navigator.indexOf('firefox'),
            isIE = navigator.indexOf('trident') ,
            isValidChromeVer = parseInt(navigator.substring(isChrome+7, isChrome+8)) >= 4,
            isValidFireForVer = parseInt(navigator.substring(isFireFox+8, isFireFox+9)) >= 3,
            isValidIEVer = parseInt(navigator.substring(isIE+8, isIE+9)) >= 7;

            if((isChrome > -1 && isValidChromeVer){ console.log("Chrome Browser")}

            if(isFireFox > -1 && isValidFireForVer){ console.log("FireFox  Browser")}

            if(isIE > -1 && isValidIEVer)){ console.log("IE Browser")}


        }

这结合了罗伯的原始答案和皮劳2016年的更新

    var isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
    // Opera 8.0+ (UA detection to detect Blink/v8-powered Opera)
var isFirefox = typeof InstallTrigger !== 'undefined';   // Firefox 1.0+
var isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0;
    // At least Safari 3+: "[object HTMLElementConstructor]"
var isChrome = !!window.chrome && !isOpera;              // Chrome 1+
var isIE = /*@cc_on!@*/false || !!document.documentMode;
// Edge 20+
var isEdge = !isIE && !!window.StyleMedia;
// Chrome 1+
var output = 'Detecting browsers by ducktyping:<hr>';
output += 'isFirefox: ' + isFirefox + '<br>';
output += 'isChrome: ' + isChrome + '<br>';
output += 'isSafari: ' + isSafari + '<br>';
output += 'isOpera: ' + isOpera + '<br>';
output += 'isIE: ' + isIE + '<br>';
output += 'isIE Edge: ' + isEdge + '<br>';
document.body.innerHTML = output;

以下是2016年Rob的答案调整版本，包括Microsoft Edge和Blink检测:

(编辑:我用这些信息更新了Rob的答案。)

// Opera 8.0+ (UA detection to detect Blink/v8-powered Opera) isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0; // Firefox 1.0+ isFirefox = typeof InstallTrigger !== 'undefined'; // Safari 3.0+ isSafari = /constructor/i.test(window.HTMLElement) || (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window['safari'] || safari.pushNotification); // Internet Explorer 6-11 isIE = /*@cc_on!@*/false || !!document.documentMode; // Edge 20+ isEdge = !isIE && !!window.StyleMedia; // Chrome 1+ isChrome = !!window.chrome && !!window.chrome.webstore; // Blink engine detection isBlink = (isChrome || isOpera) && !!window.CSS; /* Results: */ console.log("isOpera", isOpera); console.log("isFirefox", isFirefox); console.log("isSafari", isSafari); console.log("isIE", isIE); console.log("isEdge", isEdge); console.log("isChrome", isChrome); console.log("isBlink", isBlink);

这种方法的美妙之处在于它依赖于浏览器引擎属性，因此它甚至涵盖了衍生浏览器，如Yandex或Vivaldi，这些浏览器实际上与它们所使用的引擎的主要浏览器兼容。例外是Opera，它依赖于用户代理嗅探，但是今天(即ver。15岁及以上)甚至Opera本身也只是Blink的一个外壳。

var BrowserDetect = {
        init: function () {
            this.browser = this.searchString(this.dataBrowser) || "Other";
            this.version = this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) || "Unknown";
        },
        searchString: function (data) {
            for (var i = 0; i < data.length; i++) {
                var dataString = data[i].string;
                this.versionSearchString = data[i].subString;

                if (dataString.indexOf(data[i].subString) !== -1) {
                    return data[i].identity;
                }
            }
        },
        searchVersion: function (dataString) {
            var index = dataString.indexOf(this.versionSearchString);
            if (index === -1) {
                return;
            }

            var rv = dataString.indexOf("rv:");
            if (this.versionSearchString === "Trident" && rv !== -1) {
                return parseFloat(dataString.substring(rv + 3));
            } else {
                return parseFloat(dataString.substring(index + this.versionSearchString.length + 1));
            }
        },

        dataBrowser: [
            {string: navigator.userAgent, subString: "Edge", identity: "MS Edge"},
            {string: navigator.userAgent, subString: "MSIE", identity: "Explorer"},
            {string: navigator.userAgent, subString: "Trident", identity: "Explorer"},
            {string: navigator.userAgent, subString: "Firefox", identity: "Firefox"},
            {string: navigator.userAgent, subString: "Opera", identity: "Opera"},  
            {string: navigator.userAgent, subString: "OPR", identity: "Opera"},  

            {string: navigator.userAgent, subString: "Chrome", identity: "Chrome"}, 
            {string: navigator.userAgent, subString: "Safari", identity: "Safari"}       
        ]
    };

    BrowserDetect.init();


    var bv= BrowserDetect.browser;
    if( bv == "Chrome"){
        $("body").addClass("chrome");
    }
    else if(bv == "MS Edge"){
     $("body").addClass("edge");
    }
    else if(bv == "Explorer"){
     $("body").addClass("ie");
    }
    else if(bv == "Firefox"){
     $("body").addClass("Firefox");
    }


$(".relative").click(function(){
$(".oc").toggle('slide', { direction: 'left', mode: 'show' }, 500);
$(".oc1").css({
   'width' : '100%',
   'margin-left' : '0px',
   });
});

我们可以使用下面的util方法

utils.isIE = function () {
        var ver = navigator.userAgent;
        return ver.indexOf("MSIE") !== -1 || ver.indexOf("Trident") !== -1; // need to check for Trident for IE11
    };

    utils.isIE32 = function () {
        return (utils.isIE() && navigator.appVersion.indexOf('Win64') === -1);
    };

    utils.isChrome = function () {
        return (window.chrome);
    };

    utils.isFF64 = function () {
        var agent = navigator.userAgent;
        return (agent.indexOf('Win64') >= 0 && agent.indexOf('Firefox') >= 0);
    };

    utils.isFirefox = function () {
        return (navigator.userAgent.toLowerCase().indexOf('firefox') > -1);
    };