```js /** * 返回当前浏览器是什么类型的浏览器 */ function userBrowser(){ var browserName=navigator.userAgent.toLowerCase(); if(/msie/i.test(browserName) && !/opera/.test(browserName)){ console.log("IE"); }else if(/firefox/i.test(browserName)){ console.log("Firefox"); }else if(/chrome/i.test(browserName) && /webkit/i.test(browserName) && /mozilla/i.test(browserName)){ console.log("Chrome"); }else if(/opera/i.test(browserName)){ console.log("Opera"); }else if(/webkit/i.test(browserName) &&!(/chrome/i.test(browserName) && /webkit/i.test(browserName) && /mozilla/i.test(browserName))){ console.log("Safari"); }else{ console.log("不知道什么鬼!"); } } ```