| 12
 3
 4
 5
 6
 7
 8
 9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 
 | <!DOCTYPE html>
<meta charset="utf-8"/>
<title>:modal pseudo-class</title>
<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
<link rel="author" title="Jihwan Marc Kim" href="mailto:bluewhale.marc@gmail.com" />
<link rel="help" href="https://drafts.csswg.org/selectors/#modal-state">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<dialog id="dialog">Just another dialog.</dialog>
<div id="container">
  <button id="btn"></button>
</div>
<script>
  test(() => {
    const dialog = document.getElementById("dialog");
    assert_false(dialog.matches(":modal"), "dialog is initially closed (does not match :modal)");
    dialog.showModal();
    assert_true(dialog.matches(":modal"), "dialog should match :modal after showModal() call");
    dialog.close();
    assert_false(dialog.matches(":modal"), "dialog should no longer match :modal after close() call");
    dialog.show();
    assert_false(dialog.matches(":modal"), "dialog shouldn't match :modal after show() call");
    dialog.close();
    dialog.showModal();
    assert_true(dialog.matches(":modal"), "dialog should match :modal after showModal() call");
    dialog.remove();
    assert_false(dialog.matches(":modal"), "dialog shouldn't match :modal after being removed from document");
    document.body.append(dialog);
    assert_false(dialog.matches(":modal"), "dialog shouldn't match :modal after being re-appended to document");
    dialog.close();
  }, "Test that :modal matches modal <dialog>");
  promise_test(async () => {
    const container = document.getElementById("container");
    const btn = document.getElementById("btn");
    assert_false(container.matches(":modal"), "before requestFullscreen (does not match :modal)");
    await test_driver.click(btn);
    await container.requestFullscreen();
    assert_true(container.matches(":modal"), ":fullscreen should match :modal");
    await document.exitFullscreen();
    assert_false(container.matches(":modal"), "after exitFullscreen (does not match :modal)");
  }, "Test that :modal matches the fullscreen element");
</script>
 |