navbar.js

$(document).ready(function() {
  $('.scrollable').click(function(event) {
    if (window.location.pathname === "/") {
      event.preventDefault();
      var anchor = $(this);
      var target = $(anchor.attr('href')).offset().top - 70;
      $('html, body').stop().animate({scrollTop: target});
    } else {
      window.location = "/" + (anchor.attr('href'));
    }
});