index.js

document.addEventListener('DOMContentLoaded', function() {
  // Logo
  var $logo = document.getElementById('logo');

  $logo.addEventListener('click', function(event) {
    event.preventDefault();
    history.replaceState('', document.title, ' ');
    window.scrollTo(0,0);
  });

  // Hashes
  var $hashes = document.querySelectorAll('.hash, .menu-list-ul li a');

  Array.prototype.forEach.call($hashes, function($el) {
    $el.addEventListener('click', function(event) {
      event.preventDefault();
      var propertyName = $el.dataset.propertyName;
      var $target = document.getElementById($el.dataset.propertyName);
      history.replaceState('', document.title, '#' + propertyName);

      if ($target) {
        $target.scrollIntoView();
      }
    });
  });
});