Don't reload page when clicking a jump link from nav menu that references a place on the same page

no-page-reload-on-same-page-jump-link.js

$('.page-template-about .dropdown-menu a').click(function(event) {
    //don't reload the page and jump to that section
    event.preventDefault();
    //get the section to jump to
    var hash = this.hash.substr(1);
    //offset the nav height for fixed nav
    var navHeight = $('#wrapper-navbar').outerHeight();
    var sectionOffset = $('#' + hash).offset().top;
    //jump to the section programatically
    $('html, body').animate({
      scrollTop: (sectionOffset - navHeight)
        }, 0 );
  });