9. dialog

<dialog open>
  <p>스크립트 안써도 정말 된다구?</p>
  <form method="dialog">
    <button>OK</button>
  </form>
</dialog>

<dialog>
  <button autofocus>Close</button>
  <p>이번엔 배경색 넣기</p>
</dialog>
<button>얍얍</button>

::backdrop {
  background-image: linear-gradient(
    45deg,
    magenta,
    rebeccapurple,
    dodgerblue,
    green
  );
  opacity: 0.75;
}

const dialog = document.querySelector("dialog");
const showButton = document.querySelector("dialog + button");
const closeButton = document.querySelector("dialog button");

// "Show the dialog" button opens the dialog modally
showButton.addEventListener("click", () => {
  dialog.showModal();
});

// "Close" button closes the dialog
closeButton.addEventListener("click", () => {
  dialog.close();
});

<dialog closedby="any">…</dialog>