doccano/app/server/static/pages/index.js

import Swiper from 'swiper';

new Swiper('.swiper-container', {
  // Optional parameters
  loop: true,
  autoplay: {
    delay: 5000,
  },
  // Navigation arrows
  navigation: {
    nextEl: '.swiper-button-next',
    prevEl: '.swiper-button-prev',
  },
});

document.addEventListener('DOMContentLoaded', () => {
  const $navbarBurgers = Array.prototype.slice.call(document.querySelectorAll('.navbar-burger'), 0);

  if ($navbarBurgers.length > 0) {
    $navbarBurgers.forEach((el) => {
      el.addEventListener('click', () => {
        const target = el.dataset.target;
        const $target = document.getElementById(target);

        el.classList.toggle('is-active');
        $target.classList.toggle('is-active');
      });
    });
  }
});