(function() {
  'use strict';

  window.utils = window.utils || {};

  window.utils.alert = function(alertEl) {
    alertEl.querySelector('.alert__close').addEventListener('click', function(event) {
      alertEl.classList.add('alert--invisible');
    });
  }

})();

document.addEventListener('DOMContentLoaded', function() {

  // setup alerts
  Array.from(document.querySelectorAll('.alert')).forEach(function(alertEl) {
    window.utils.alert(alertEl);
  });
});