js如何判断IE浏览器的版本包括IE11

BluceLee 2021-11-23 原文

IE浏览器真是个坑：从ie6以及以前IE版本，简直就是垃圾，不按照Mozilla国际组织的标准来，乱搞。搞得兼容性很差：
 
<script type="text/javascript">

var userAgent = navigator.userAgent, 
rMsie = /(msie\s|trident.*rv:)([\w.]+)/, 
rFirefox = /(firefox)\/([\w.]+)/, 
rOpera = /(opera).+version\/([\w.]+)/, 
rChrome = /(chrome)\/([\w.]+)/, 
rSafari = /version\/([\w.]+).*(safari)/; 

var browser; 

var version; 

var ua = userAgent.toLowerCase(); 

function uaMatch(ua){ 

 var match = rMsie.exec(ua); 

 if(match != null){ 

 return { browser : "IE", version : match[2] || "0" }; 

 } 

 var match = rFirefox.exec(ua); 

 if (match != null) { 

 return { browser : match[1] || "", version : match[2] || "0" }; 

 } 

 var match = rOpera.exec(ua); 

 if (match != null) { 

 return { browser : match[1] || "", version : match[2] || "0" }; 

 } 

 var match = rChrome.exec(ua); 

 if (match != null) { 

 return { browser : match[1] || "", version : match[2] || "0" }; 

 } 

 var match = rSafari.exec(ua); 

 if (match != null) { 

 return { browser : match[2] || "", version : match[1] || "0" }; 

 } 

 if (match != null) { 

 return { browser : "", version : "0" }; 

 } 
} 

var browserMatch = uaMatch(userAgent.toLowerCase()); 

if (browserMatch.browser){ 

 browser = browserMatch.browser; 

 version = browserMatch.version; 
} 
document.write(browser+version);  
</script>
 
我这里有个最简单的：