Detect Internet Explorer and Edge browsers. Source http://www.moo-code.me/en/2017/03/27/javsscript-check-if-internet-explorer-or-edge/

detect-ie.js

var isIE = /*@cc_on!@*/false || !!document.documentMode, // Internet Explorer 6-11
    isEdge = !isIE && !!window.StyleMedia; // Edge 20+
if(isIE || isEdge) {
 // do something...
}