Summary of js/jquery methods to determine browser_jquery

JS gets browser information

浏览器代码名称：navigator.appCodeName
浏览器名称：navigator.appName
浏览器版本号：navigator.appVersion
对Java的支持：navigator.javaEnabled()
MIME类型（数组）：navigator.mimeTypes
系统平台：navigator.platform
插件（数组）：navigator.plugins
用户代理：navigator.userAgent

Four ways to use js to determine IE browser:

Method 1:

if(window.addEventListener){ 
alert("not ie"); 
}else if(window.attachEvent){ 
alert("is ie"); 
}else{ 
alert("这种情况发生在不支持DHTML的老版本浏览器（现在一般都支持）") 
}

Note: This method will pop up not ie results in IE9 and above IE versions

Method 2:

if(document.all){ 
alert("IE"); 
}else{ 
alert("not ie"); 
}

Method three:

var navigatorName = "Microsoft Internet Explorer"; 
if( navigator.appName == navigatorName ){ 
alert("ie") 
}else{
alert("not ie") 
}

Method 4:
It takes advantage of the difference in the toString method of array processing between IE and standard browsers. For standard browsers, if the last character in the array is a comma, the JS engine will automatically remove it.

if(!+[1,])alert("这是ie浏览器"); 
else alert("这不是ie浏览器");

Note: IE9 and above versions will pop up "This is not IE browser"

How to determine commonly used browsers:

var explorer =navigator.userAgent ;
//ie 
if (explorer.indexOf("MSIE") >= 0) {
alert("ie");
}
//firefox 
else if (explorer.indexOf("Firefox") >= 0) {
alert("Firefox");
}
//Chrome
else if(explorer.indexOf("Chrome") >= 0){
alert("Chrome");
}
//Opera
else if(explorer.indexOf("Opera") >= 0){
alert("Opera");
}
//Safari
else if(explorer.indexOf("Safari") >= 0){
alert("Safari");
} 
//Netscape
else if(explorer.indexOf("Netscape")>= 0) { 
alert('Netscape'); 
} 

navigator.userAgent is used here. indexOf("MSIE") >= 0 for judgment, of course you can also use
navigator.userAgent.indexOf("MSIE") != -1 for judgment.

How jquery determines the browser type and browser version number

$(document).ready(function(){

  var brow=$.browser;

  var bInfo="";

  if(brow.msie){bInfo="MicrosoftInternetExplorer"+brow.version;}

  if(brow.mozilla){bInfo="MozillaFirefox"+brow.version;}

  if(brow.safari){bInfo="AppleSafari"+brow.version;}

  if(brow.opera){bInfo="Opera"+brow.version;}

  alert(bInfo);

});

Note: Query has removed $.browser and $.browser.version starting from version 1.9 and replaced them with

$.support method