ADD CLASS TO ACTIVE ANCHOR THROUGH JS

help.js

// ADD CLASS TO ACTIVE ANCHOR THROUGH JS
$(function() {
    var url = window.location.href;
    // Will only work if string in href matches with location
  $('.Topnav a[href="'+ url +'"]').addClass('active');

   // Will also work for relative and absolute hrefs
   $('.Topnav a').filter(function() {
        return this.href == url;
    }).addClass('active');
});