
  //        <input>
  //    <input #firstFocusable>
  const host = document.createElement("div");
  const slotted = document.createElement("div");
  slotted.appendChild(document.createElement("input"));
  host.appendChild(slotted);

  const root = host.attachShadow({mode: "open", delegatesFocus: true});

  const firstFocusable = document.createElement("input");
  root.innerHTML = "<slot>";
  root.appendChild(firstFocusable);

  document.body.appendChild(host);

  host.focus();
  assert_equals(document.acti