How can I target only Internet Explorer 11 with JavaScript?

Question

What\'s the least error-prone way to target just IE11 with JavaScript?

Note: This should really only be done for analytics or informing the user what browser they\'r

Answer 1

This will set ie to the version of IE, or 0 if none. It'll work for 1 through 11, but may not detect future versions if Microsoft drops the Trident engine.

var ie = 0;
try { ie = navigator.userAgent.match( /(MSIE |Trident.*rv[ :])([0-9]+)/ )[ 2 ]; }
catch(e){}

You may also be interested in my related, more detailed answer here.