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define([
    'jquery',
    'mage/translate',
    'jquery/ui',
    'Magento_Ui/js/modal/modal'
], function($, $t, ui, modal) {
  
  // clia modal
  var popup = $('<div class="themecafe-free-popup"/>').html('<h1>HTML Content</h1>').modal({
  modalClass: 'changelog',
  title: $t("Model Title"),
  buttons: [{
          text: 'Continue Shopping',
          click: function () {
              this.closeModal();
          }
      }]
  });
  popup.modal('openModal');
  
});