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(function(GW, $) {
  'use strict';
  let button;

  /**
  * Scrolls to top of page.
  *
  * @param {event} event - Prevents the default event of the trigger.
  */
  function animateToTop(event) {
    event.preventDefault();
    window.scrollTo({
      top: 0,
      behavior: 'smooth'
    });
  }

  GW.backToTop = {

    init: function() {
      button = document.querySelector('.js-back-to-top');

      if (button) {
        button.addEventListener('click', animateToTop);
      }
    }

  };
}(window.GW = window.GW || {}, jQuery));