wpt/shadow-dom/reference-target/label-descendant.html at 1576218b9c0d127aee1fc3bfcac91e3678a79b36 · web-platform-tests/wpt · GitHub

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<!DOCTYPE HTML>
<html>

<head>
<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>
<script src="/resources/testdriver-actions.js"></script>
<script src="/wai-aria/scripts/aria-utils.js"></script>
</head>

<body>
<!-- 1. Label applies to descendant custom element that uses shadowrootreferencetarget -->

<label>
  Input 1
  <div>
    <x-input1 id="x-input1">
      <template shadowrootmode="open" shadowrootreferencetarget="input">
        <input id="input">
      </template>
    </x-input1>
  </div>
</label>

<label>
  Input 1 via Options
  <div>
    <x-input1 id="x-input1-a"></x-input1>
  </div>
</label>
<script>
  const customInput1 = document.querySelector('#x-input1-a');
  customInput1.attachShadow({ mode: 'open', referenceTarget: 'input' });
  customInput1.shadowRoot.innerHTML = `<input id="input">`;
</script>

<script>
  function testImplicitLabelAssociation(id, label) {
    promise_test(async t => {
      const x_input = document.getElementById(id);
      const input = x_input.shadowRoot.getElementById('input');

      // The label should apply to the input element and not the host.
      assert_equals(await test_driver.get_computed_label(x_input), "");
      assert_equals(await test_driver.get_computed_label(input), label);
    }, "Label applies to descendant custom element that uses shadowrootreferencetarget (" + label + ")");
  }
  testImplicitLabelAssociation('x-input1', 'Input 1');
  testImplicitLabelAssociation('x-input1-a', 'Input 1 via Options');
</script>

<!-- 2. Label applies to multiple layers of descendant custom elements that use shadowrootreferencetarget -->

<label>
  Input 2
  <x-outer2 id="x-outer2">
    <template shadowrootmode="open" shadowrootreferencetarget="x-inner2">
      <x-inner2 id="x-inner2">
        <template shadowrootmode="open" shadowrootreferencetarget="input">
          <input id="input">
        </template>
      </x-inner2>
    </template>
  </x-outer2>
</label>

<label>
  Input 2 via Options
  <x-outer2 id="x-outer2-a"></x-outer2>
</label>

<script>
  const customOuter2 = document.querySelector('#x-outer2-a');
  customOuter2.attachShadow({ mode: 'open', referenceTarget: 'x-inner2' });
  customOuter2.shadowRoot.innerHTML = `<x-inner2 id="x-inner2"></x-inner2>`;
  const customInner2 = customOuter2.shadowRoot.querySelector('x-inner2');
  customInner2.attachShadow({ mode: 'open', referenceTarget: 'input' });
  customInner2.shadowRoot.innerHTML = `<input id="input">`;
</script>

<script>
  function testDeepImplicitLabelAssociation(id, label) {
    promise_test(async t => {
      const outer = document.getElementById(id);
      const inner = outer.shadowRoot.getElementById('x-inner2');
      const input = inner.shadowRoot.getElementById('input');

      // The label should apply to the input element and not any of the hosts.
      assert_equals(await test_driver.get_computed_label(outer), "");
      assert_equals(await test_driver.get_computed_label(inner), "");
      assert_equals(await test_driver.get_computed_label(input), label);
    }, "Label applies to multiple layers of descendant custom elements that use shadowrootreferencetarget (" + label + ")");
  }
  testDeepImplicitLabelAssociation('x-outer2', 'Input 2');
  testDeepImplicitLabelAssociation('x-outer2-a', 'Input 2 via Options');
</script>

</body>

</html>