// A plain custom element: one light-DOM button that asks the admin SPA to
// run the field's action. It makes no request and reads no cookie or
// storage; the SPA owns HTTP.
class AcmeDemoLookup extends HTMLElement {
  connectedCallback() {
    if (this.firstChild) return
    const button = document.createElement('button')
    button.type = 'button'
    button.textContent = this.getAttribute('label') || ''
    button.addEventListener('click', () => {
      this.dispatchEvent(new CustomEvent('summer-action', { bubbles: true, composed: true }))
    })
    this.append(button)
  }
}
if (!customElements.get('acme-demo-lookup')) {
  customElements.define('acme-demo-lookup', AcmeDemoLookup)
}