Настройка Micromodal js не могу разобраться с документацией

window.addEventListener('DOMContentLoaded', function () {
   MicroModal.init({
      onShow: modal => console.info(`${modal.id} is shown`), // [1]
      onClose: modal => console.info(`${modal.id} is hidden`), // [2]
      openTrigger: 'data-custom-open',
      closeTrigger: 'data-micromodal-close',
      disableScroll: true,
      disableFocus: true,
      awaitOpenAnimation: true,
      awaitCloseAnimation: true,
   });
});

.modal {
   font-family: -apple-system,BlinkMacSystemFont,avenir next,avenir,helvetica neue,helvetica,ubuntu,roboto,noto,segoe ui,arial,sans-serif;
 }
 
 .modal__overlay {
   position: fixed;
   top: 0;
   left: 0;
   right: 0;
   bottom: 0;
   background: rgba(0,0,0,0.6);
   display: flex;
   justify-content: center;
   align-items: center;
 }
 
 .modal__container {
   background-color: #fff;
   padding: 30px;
   max-width: 500px;
   max-height: 100vh;
   border-radius: 4px;
   overflow-y: auto;
   box-sizing: border-box;
 }
 
 .modal__header {
   display: flex;
   justify-content: space-between;
   align-items: center;
 }
 
 .modal__title {
   margin-top: 0;
   margin-bottom: 0;
   font-weight: 600;
   font-size: 1.25rem;
   line-height: 1.25;
   color: #00449e;
   box-sizing: border-box;
 }
 
 .modal__close {
   background: transparent;
   border: 0;
 }
 
 .modal__header .modal__close:before { content: "\2715"; }
 
 .modal__content {
   margin-top: 2rem;
   margin-bottom: 2rem;
   line-height: 1.5;
   color: rgba(0,0,0,.8);
 }
 
 .modal__btn {
   font-size: .875rem;
   padding-left: 1rem;
   padding-right: 1rem;
   padding-top: .5rem;
   padding-bottom: .5rem;
   background-color: #e6e6e6;
   color: rgba(0,0,0,.8);
   border-radius: .25rem;
   border-style: none;
   border-width: 0;
   cursor: pointer;
   -webkit-appearance: button;
   text-transform: none;
   overflow: visible;
   line-height: 1.15;
   margin: 0;
   will-change: transform;
   -moz-osx-font-smoothing: grayscale;
   -webkit-backface-visibility: hidden;
   backface-visibility: hidden;
   -webkit-transform: translateZ(0);
   transform: translateZ(0);
   transition: -webkit-transform .25s ease-out;
   transition: transform .25s ease-out;
   transition: transform .25s ease-out,-webkit-transform .25s ease-out;
 }
 
 .modal__btn:focus, .modal__btn:hover {
   -webkit-transform: scale(1.05);
   transform: scale(1.05);
 }
 
 .modal__btn-primary {
   background-color: #00449e;
   color: #fff;
 }
 
 
 
 /**************************\
   Demo Animation Style
 \**************************/
 @keyframes mmfadeIn {
     from { opacity: 0; }
       to { opacity: 1; }
 }
 
 @keyframes mmfadeOut {
     from { opacity: 1; }
       to { opacity: 0; }
 }
 
 @keyframes mmslideIn {
   from { transform: translateY(15%); }
     to { transform: translateY(0); }
 }
 
 @keyframes mmslideOut {
     from { transform: translateY(0); }
     to { transform: translateY(-10%); }
 }
 
 .micromodal-slide {
   display: none;
 }
 
 .micromodal-slide.is-open {
   display: block;
 }
 
 .micromodal-slide[aria-hidden="false"] .modal__overlay {
   animation: mmfadeIn .3s cubic-bezier(0.0, 0.0, 0.2, 1);
 }
 
 .micromodal-slide[aria-hidden="false"] .modal__container {
   animation: mmslideIn .3s cubic-bezier(0, 0, .2, 1);
 }
 
 .micromodal-slide[aria-hidden="true"] .modal__overlay {
   animation: mmfadeOut .3s cubic-bezier(0.0, 0.0, 0.2, 1);
 }
 
 .micromodal-slide[aria-hidden="true"] .modal__container {
   animation: mmslideOut .3s cubic-bezier(0, 0, .2, 1);
 }
 
 .micromodal-slide .modal__container,
 .micromodal-slide .modal__overlay {
   will-change: transform;
 }

      <button class="modal-btn" data-custom-open="modal-1">Пройти тест</button>
      <div class="modal micromodal-slide" id="modal-1" aria-hidden="true">
        <div class="modal__overlay" tabindex="-1" data-micromodal-close>
          <div class="modal__container" role="dialog" aria-modal="true" aria-labelledby="modal-1-title">
            <header class="modal__header">
              <h2 class="modal__title" id="modal-2-title">
                Micromodal
              </h2>
              <button class="modal__close" aria-label="Close modal" data-micromodal-close></button>
            </header>
            <main class="modal__content" id="modal-2-content">
              <p>
                Try hitting the <code>tab</code> key and notice how the focus stays within the modal itself. Also, <code>esc</code> to close modal.
              </p>
            </main>
            <footer class="modal__footer">
              <button class="modal__btn modal__btn-primary"  data-custom-open="modal-2">Continue</button>
              <button class="modal__btn" data-micromodal-close aria-label="Close this dialog window">Close</button>
            </footer>
          </div>
        </div>
      </div>
  <script src="https://unpkg.com/micromodal/dist/micromodal.min.js"></script>