function setup() {
  let templates = document.querySelectorAll("template[simple]");
  templates.forEach((template) => {
    let templateId = template.getAttribute("id");
    let templateContent = template.content;
    customElements.define(templateId, class extends HTMLElement {
      constructor() {
        super();
        this.appendChild(templateContent.cloneNode(true));
        this.slots = this.querySelectorAll("slot");
      }
      connectedCallback() {
        let toremove = [];
        this.slots.forEach((tslot) => {
          let slotName = tslot.getAttribute("name");
          let slotContent = this.querySelector(`[slot="${slotName}"]`);
          if (slotContent) {
            tslot.replaceWith(slotContent.cloneNode(true));
            toremove.push(slotContent);
          }
        });
        toremove.forEach((element) => {
          element.remove();
        });
      }
    });
  });
}
export {
  setup
};