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")}


        }

如果有人觉得这个有用，我已经把Rob W的答案变成了一个返回浏览器字符串的函数，而不是有多个浮动的变量。由于浏览器在不重新加载的情况下也不能真正改变，所以我让它缓存结果，以防止它在下次调用函数时需要计算出来。

/** * Gets the browser name or returns an empty string if unknown. * This function also caches the result to provide for any * future calls this function has. * * @returns {string} */ var browser = function() { // Return cached result if avalible, else get result then cache it. if (browser.prototype._cachedResult) return browser.prototype._cachedResult; // Opera 8.0+ var isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0; // Firefox 1.0+ var isFirefox = typeof InstallTrigger !== 'undefined'; // Safari 3.0+ "[object HTMLElementConstructor]" var isSafari = /constructor/i.test(window.HTMLElement) || (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window['safari'] || safari.pushNotification); // Internet Explorer 6-11 var isIE = /*@cc_on!@*/false || !!document.documentMode; // Edge 20+ var isEdge = !isIE && !!window.StyleMedia; // Chrome 1+ var isChrome = !!window.chrome && !!window.chrome.webstore; // Blink engine detection var isBlink = (isChrome || isOpera) && !!window.CSS; return browser.prototype._cachedResult = isOpera ? 'Opera' : isFirefox ? 'Firefox' : isSafari ? 'Safari' : isChrome ? 'Chrome' : isIE ? 'IE' : isEdge ? 'Edge' : isBlink ? 'Blink' : "Don't know"; }; console.log(browser());

此方法目前对检测所有浏览器有效。我引用vue-element-admin模板

 export function fnBrowserDetect() {
      var browserName = (function(agent) {
        switch (true) {
          case agent.indexOf('edge') > -1: return 'MS Edge'
          case agent.indexOf('edg/') > -1: return 'Edge (chromium based)'
          case agent.indexOf('opr') > -1 && !!window.opr: return 'Opera'
          case agent.indexOf('chrome') > -1 && !!window.chrome: return 'Chrome'
          case agent.indexOf('trident') > -1: return 'MS IE'
          case agent.indexOf('firefox') > -1: return 'Mozilla Firefox'
          case agent.indexOf('safari') > -1: return 'Safari'
          default: return 'other'
        }
      })(window.navigator.userAgent.toLowerCase())
      return browserName.toLowerCase()
    }

你可以像这样检测它:

if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/)) {
   alert('Firefox');
}

短变体(更新2020年7月10日移动浏览器检测修复)

var browser = (function() { var test = function(regexp) {return regexp.test(window.navigator.userAgent)} switch (true) { case test(/edg/i): return "Microsoft Edge"; case test(/trident/i): return "Microsoft Internet Explorer"; case test(/firefox|fxios/i): return "Mozilla Firefox"; case test(/opr\//i): return "Opera"; case test(/ucbrowser/i): return "UC Browser"; case test(/samsungbrowser/i): return "Samsung Browser"; case test(/chrome|chromium|crios/i): return "Google Chrome"; case test(/safari/i): return "Apple Safari"; default: return "Other"; } })(); console.log(browser)

打字文件版本:

export enum BROWSER_ENUM {
  EDGE ,
  INTERNET_EXPLORER ,
  FIRE_FOX ,
  OPERA ,
  UC_BROWSER ,
  SAMSUNG_BROWSER ,
  CHROME ,
  SAFARI ,
  UNKNOWN ,
}

const testUserAgent = (regexp: RegExp): boolean => regexp.test(window.navigator.userAgent);

function detectBrowser(): BROWSER_ENUM {
  switch (true) {
    case testUserAgent(/edg/i): return BROWSER_ENUM.EDGE;
    case testUserAgent(/trident/i): return BROWSER_ENUM.INTERNET_EXPLORER;
    case testUserAgent(/firefox|fxios/i): return BROWSER_ENUM.FIRE_FOX;
    case testUserAgent(/opr\//i): return BROWSER_ENUM.OPERA;
    case testUserAgent(/ucbrowser/i): return BROWSER_ENUM.UC_BROWSER;
    case testUserAgent(/samsungbrowser/i): return BROWSER_ENUM.SAMSUNG_BROWSER;
    case testUserAgent(/chrome|chromium|crios/i): return BROWSER_ENUM.CHROME;
    case testUserAgent(/safari/i): return BROWSER_ENUM.SAFARI;
    default: return BROWSER_ENUM.UNKNOWN;
  }
}

export const BROWSER: BROWSER_ENUM = detectBrowser();

export const IS_FIREFOX = BROWSER === BROWSER_ENUM.FIRE_FOX;

函数式算法，只是为了好玩:

 const BROWSER =  Object.entries({
     "Microsoft Edge": /edg/i,
     "Microsoft Internet Explorer": /trident/i,
     "Mozilla Firefox": /firefox|fxios/i,
     "Opera": /opr\//i,
     "UC Browser": /ucbrowser/i,
     "Samsung Browser": /samsungbrowser/i,
     "Google Chrome": /chrome|chromium|crios/i,
     "Apple Safari": /safari/i,
     "Unknown": /.+/i,
 }).find(([, value]) => value.test(window.navigator.userAgent)).pop();

const isChrome = /Chrome/.test(navigator.userAgent)
const isFirefox = /Firefox/.test(navigator.userAgent)