hubl/src/scripts/index.js

document.addEventListener('DOMContentLoaded', function (event) {
  const menuWrappers = Array.from(document.querySelectorAll('.menu-wrapper'));
  const rightMenus = Array.from(document.querySelectorAll('nav.jsRightMenu'));
  const viewsContainer = Array.from(document.querySelectorAll('.views-container'));

  //- Toggle sub-menus
  menuWrappers.forEach(menuWrapper => {
    const menu = menuWrapper.querySelector('.menu');
    menu.addEventListener('click', e => {
      menuWrapper.classList.toggle('is-closed');
    });
  });

  //- Open/close menu on the right
  rightMenus.forEach(rightMenu => {
    const btnRightMenu = rightMenu.querySelector("li.jsOffsiteToggle");

    btnRightMenu.addEventListener('click', e => {
      rightMenus.forEach(rM => rM.classList.toggle('offsite-is-closed'));
      viewsContainer.forEach(vC => vC.classList.toggle('sidebar-is-closed'));
    })
  });

});