Method constructor

adev/src/content/examples/elements/src/app/app.ts:17–25

(
    injector: Injector,
    public popup: PopupService,
  )

})
export class App {
  constructor(
    injector: Injector,
    public popup: PopupService,
  ) {
    // Convert `PopupComponent` to a custom element.
    const PopupElement = createCustomElement(Popup, {injector});
    // Register the custom element with the browser.
    customElements.define('popup-element', PopupElement);
  }
}