javascript - How can I detect browser type using jQuery?

Question

I want to detect if the user is using IE and Firefox but I cannot find the script.

I have code as below:

$(document).ready(function(e) {
    $.browser.chrome = /chrom(e|ium)/.test(navigator.userAgent.toLowerCase()); 
    if($.browser.chrome){
        alert(1);
             //this work well
    }
            else if(//the browser is IE){alert(2);}
            else if(//the browser is Firefox){alert(3);}

   //The problem is that I don't know how to write a script for IE and FireFox browser for chrome is work fine
 )};

Answer 1

The best solution is probably: use Modernizr.

However, if you necessarily want to use $.browser property, you can do it using jQuery Migrate plugin (for JQuery >= 1.9 - in earlier versions you can just use it) and then do something like:

if($.browser.chrome) {
   alert(1);
} else if ($.browser.mozilla) {
   alert(2);
} else if ($.browser.msie) {
   alert(3);
}

And if you need for some reason to use navigator.userAgent, then it would be:

$.browser.msie = /msie/.test(navigator.userAgent.toLowerCase()); 
$.browser.mozilla = /firefox/.test(navigator.userAgent.toLowerCase());