typescript_wakaran.ts

document.addEventListener('DOMContentLoaded', () => {
  const $navbarBurgers = <HTMLElement[]>Array.prototype.slice.call(
    document.querySelectorAll('.navbar-burger'), 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');
    });
  });
});