这是Fzs2和kennebec的更新，用于新边缘铬

function get_browser() { var ua=navigator.userAgent,tem,M=ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || []; if(/trident/i.test(M[1])){ tem=/\brv[ :]+(\d+)/g.exec(ua) || []; return {name:'IE',version:(tem[1]||'')}; } if(M[1]==='Chrome'){ tem=ua.match(/\bEdg\/(\d+)/) if(tem!=null) {return {name:'Edge(Chromium)', version:tem[1]};} tem=ua.match(/\bOPR\/(\d+)/) if(tem!=null) {return {name:'Opera', version:tem[1]};} } M=M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?']; if((tem=ua.match(/version\/(\d+)/i))!=null) {M.splice(1,1,tem[1]);} return { name: M[0], version: M[1] }; } var browser=get_browser(); // browser.name = 'Edge(Chromium)' // browser.version = '86' console.log(browser);

基于已接受的答案，这是检测“Microsoft Edge”的更新

navigator.sayswho= (function(){ var ua= navigator.userAgent; var tem; var M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || []; if(/trident/i.test(M[1])){ tem= /\brv[ :]+(\d+)/g.exec(ua) || []; return 'IE '+(tem[1] || ''); } if(M[1]=== 'Chrome'){ tem= ua.match(/\b(OPR|Edg)\/(\d+)/); if(tem!= null) return tem.slice(1).join(' ').replace('OPR', 'Opera'); } M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?']; if((tem= ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1]); return M.join(' '); })(); console.log(navigator.sayswho);

这是对Kennebec答案的改进。

mbrowser=function(){
    this.spec_string=   navigator.userAgent;
    this.name=          this.get_name();
    this.version=       this.get_version();
    };

mbrowser.prototype.get_name=function(){
    var spec_string=this.spec_string;

    var matches=spec_string.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
    
    // Work with the matches.
    matches=matches[2]? [matches[1], matches[2]]: [navigator.appName, navigator.appVersion, '-?'];
        
    // Trident.
    if(/trident/i.test(matches[1])){
        var temp=/\brv[ :]+(\d+)/g.exec(spec_string) || [];
        return 'IE';
        }
    
    // Chrome.
    if(matches[1]==='Chrome'){
        var temp=spec_string.match(/\bOPR|Edge\/(\d+)/)
        if(temp!=null)   {return 'Opera';}
        }   

    if((temp=spec_string.match(/version\/(\d+)/i))!=null){
        matches.splice(1,1,temp[1]);
        }
                                                                                                                       
    var name=matches[0];

    return name;
    };


mbrowser.prototype.get_version=function(){
    var spec_string=this.spec_string;

    var matches=spec_string.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || []; 

    // Work with the matches.
    matches=matches[2]? [matches[1], matches[2]]: [navigator.appName, navigator.appVersion, '-?'];

    // Trident.
    if(/trident/i.test(matches[1])){
        var temp=/\brv[ :]+(\d+)/g.exec(spec_string) || []; 
        var version=(temp[1]||'');
        return version;
        }   

    // Chrome.
    if(matches[1]==='Chrome'){
        var temp=spec_string.match(/\bOPR|Edge\/(\d+)/)
        var version=temp[1];
        if(temp!=null)   {return version;}
        }   

    if((temp=spec_string.match(/version\/(\d+)/i))!=null){
        matches.splice(1,1,temp[1]);                                                                                   
        }

    var version=matches[1];

    return version;
    };

// m=module.
var browser=new mbrowser();
console.log(browser.name);    // Chrome
console.log(browser.version); // 109

这段代码从spec_string (navigator.userAgent)中推导出浏览器名称和编号。但是有各种各样的spec_string，它们有各自的浏览器名称和编号。我没有条件去检查，但是其中的一小部分。如果你能发布一个你知道的浏览器名称和编号的spec_string，那就太好了。然后我可以相应地更新代码。

然后，我将按照以下方式慢慢地构建spec_string项的列表。

'spec_string1'=>[name,number],
'spec_string2'=>[name,number],

以后，无论何时对代码进行更改，都可以在所有已知的spec_string转换上自动对其进行测试。

我们可以一起做这件事。

浏览器JavaScript库提供了此功能。

if (bowser.msie && bowser.version <= 6) {
  alert('Hello China');
}

它似乎保养得很好。

我根据Hermann Ingjaldsson的回答写了一个版本检测器，但是更健壮，它返回一个包含名称/版本数据的对象。它涵盖了主要的浏览器，但我不介意过多的移动浏览器和小浏览器:

function getBrowserData(nav) {
    var data = {};

    var ua = data.uaString = nav.userAgent;
    var browserMatch = ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*([\d\.]+)/i) || [];
    if (browserMatch[1]) { browserMatch[1] = browserMatch[1].toLowerCase(); }
    var operaMatch = browserMatch[1] === 'chrome';
    if (operaMatch) { operaMatch = ua.match(/\bOPR\/([\d\.]+)/); }

    if (/trident/i.test(browserMatch[1])) {
        var msieMatch = /\brv[ :]+([\d\.]+)/g.exec(ua) || [];
        data.name = 'msie';
        data.version = msieMatch[1];
    }
    else if (operaMatch) {
        data.name = 'opera';
        data.version = operaMatch[1];
    }
    else if (browserMatch[1] === 'safari') {
        var safariVersionMatch = ua.match(/version\/([\d\.]+)/i);
        data.name = 'safari';
        data.version = safariVersionMatch[1];
    }
    else {
        data.name = browserMatch[1];
        data.version = browserMatch[2];
    }

    var versionParts = [];
    if (data.version) {
        var versionPartsMatch = data.version.match(/(\d+)/g) || [];
        for (var i=0; i < versionPartsMatch.length; i++) {
            versionParts.push(versionPartsMatch[i]);
        }
        if (versionParts.length > 0) { data.majorVersion = versionParts[0]; }
    }
    data.name = data.name || '(unknown browser name)';
    data.version = {
        full: data.version || '(unknown full browser version)',
        parts: versionParts,
        major: versionParts.length > 0 ? versionParts[0] : '(unknown major browser version)'
    };

    return data;
};

它可以这样使用:

var brData = getBrowserData(window.navigator || navigator);
console.log('name: ' + brData.name);
console.log('major version: ' + brData.version.major);
// etc.

var nVer = navigator.appVersion;
var nAgt = navigator.userAgent;
var browserName = navigator.appName;
var fullVersion = '' + parseFloat(navigator.appVersion);
var majorVersion = parseInt(navigator.appVersion, 10);
var nameOffset, verOffset, ix;

// In Opera 15+, the true version is after "OPR/" 
if ((verOffset = nAgt.indexOf("OPR/")) != -1) {
    browserName = "Opera";
    fullVersion = nAgt.substring(verOffset + 4);
}
// In older Opera, the true version is after "Opera" or after "Version"
else if ((verOffset = nAgt.indexOf("Opera")) != -1) {
    browserName = "Opera";
    fullVersion = nAgt.substring(verOffset + 6);
    if ((verOffset = nAgt.indexOf("Version")) != -1)
        fullVersion = nAgt.substring(verOffset + 8);
}
// In MSIE, the true version is after "MSIE" in userAgent
else if ((verOffset = nAgt.indexOf("MSIE")) != -1) {
    browserName = "Microsoft Internet Explorer";
    fullVersion = nAgt.substring(verOffset + 5);
}
// In Chrome, the true version is after "Chrome" 
else if ((verOffset = nAgt.indexOf("Chrome")) != -1) {
    browserName = "Google Chrome";
    fullVersion = nAgt.substring(verOffset + 7);
}
// In Safari, the true version is after "Safari" or after "Version" 
else if ((verOffset = nAgt.indexOf("Safari")) != -1) {
    browserName = "Safari";
    fullVersion = nAgt.substring(verOffset + 7);
    if ((verOffset = nAgt.indexOf("Version")) != -1)
        fullVersion = nAgt.substring(verOffset + 8);
}
// In Firefox, the true version is after "Firefox" 
else if ((verOffset = nAgt.indexOf("Firefox")) != -1) {
    browserName = "Mozilla Firefox";
    fullVersion = nAgt.substring(verOffset + 8);
}
// In most other browsers, "name/version" is at the end of userAgent 
else if ((nameOffset = nAgt.lastIndexOf(' ') + 1) < (verOffset = nAgt.lastIndexOf('/'))) {
    browserName = nAgt.substring(nameOffset, verOffset);
    fullVersion = nAgt.substring(verOffset + 1);
    if (browserName.toLowerCase() == browserName.toUpperCase()) {
        browserName = navigator.appName;
    }
}
// trim the fullVersion string at semicolon/space if present
if ((ix = fullVersion.indexOf(';')) != -1) fullVersion = fullVersion.substring(0, ix);
if ((ix = fullVersion.indexOf(' ')) != -1) fullVersion = fullVersion.substring(0, ix);

majorVersion = parseInt('' + fullVersion, 10);
if (isNaN(majorVersion)) {
    fullVersion = '' + parseFloat(navigator.appVersion);
    majorVersion = parseInt(navigator.appVersion, 10);
}