valid-invalid-fieldset-disconnected.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/selectors/pseudo-classes/valid-invalid-fieldset-disconnected.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset=utf-8>

<title>Selector: pseudo-classes (:valid, :invalid) on disconnected fieldset element</title>

<link rel=help href="https://html.spec.whatwg.org/multipage/semantics-other.html#selector-valid">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<fieldset id=fieldset1>

  <input id=input1>

</fieldset>

<fieldset id=fieldset2>

  <select id=select1 required multiple>

    <option>foo

  </select>

</fieldset>

<script>

test(() => {

  const fieldset = document.querySelector("#fieldset1");

  const input = document.querySelector("#input1");

  assert_true(fieldset.matches(":valid"));

  assert_false(fieldset.matches(":invalid"));

  fieldset.remove();

  input.setCustomValidity("foo");

  assert_false(fieldset.matches(":valid"));

  assert_true(fieldset.matches(":invalid"));

  input.setCustomValidity("");

  assert_true(fieldset.matches(":valid"));

  assert_false(fieldset.matches(":invalid"));

}, "<input> element becomes invalid inside disconnected <fieldset>");

test(() => {

  const fieldset = document.querySelector("#fieldset2");

  const select = document.querySelector("#select1");

  assert_false(fieldset.matches(":valid"));

  assert_true(fieldset.matches(":invalid"));

  fieldset.remove();

  select.required = false;

  assert_true(fieldset.matches(":valid"));

  assert_false(fieldset.matches(":invalid"));

  select.required = true;

  select.firstElementChild.selected = true;

  assert_true(fieldset.matches(":valid"));

  assert_false(fieldset.matches(":invalid"));

}, "<select> element becomes valid inside disconnected <fieldset>");

</script>