Adds body class based on browser detection

browser-dectection.js

function GetIEVersion() {
  
    var sAgent = window.navigator.userAgent;
    var Idx = sAgent.indexOf("MSIE");

    // If IE, return version number.
    if (Idx > 0) {
      return parseInt(sAgent.substring(Idx+ 5, sAgent.indexOf(".", Idx)));

    // If IE 11 then look for Updated user agent string.
    } else if (!!navigator.userAgent.match(/Trident\/7\./)) {
      return 11;

    } else {
      return 0; //It is not IE
    } 
  
}

var ua = navigator.userAgent.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i),
      browser;

if ( navigator.userAgent.match(/Edge/i) ) {
    browser = 'edge';
} else if ( navigator.userAgent.match(/Trident.*rv[ :]*11\./i) ) {
    browser = 'ie';
} else {
    browser = ua[1].toLowerCase();
}


if (GetIEVersion() > 0) {
	$('body').addClass(browser);
} else {
  $('body').addClass(browser);
}