text: const innerHTML = `<div>
    This is the transport bar!
  </div>`;
  
  class TransportBar extends HTMLElement {
    constructor() {
      super();
  
      const shadowRoot = this.attachShadow({ mode: 'open' });
      shadowRoot.innerHTML = innerHTML;
    }
  }
  
  customElements.define('transport-bar', TransportBar);
  