scope-name-defining-rules.html | Explore in Territory

<!DOCTYPE html>
<title>@scope - name-defining at-rules</title>
<link rel="help" href="https://drafts.csswg.org/css-cascade-5/#scope-scope">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<main id=main></main>

<template id=test_keyframes>
  <style>
    @scope (#inner) {
      @keyframes --my-anim {
        from { background-color: rgb(0, 0, 255); }
        to { background-color: rgb(0, 0, 255); }
      }
    }
    @scope (#outer) {
      @keyframes --my-anim {
        from { background-color: rgb(0, 128, 0); }
        to { background-color: rgb(0, 128, 0); }
      }
    }
    #animating {
      animation: --my-anim 1000s linear;
    }
  </style>
  <div id=outer>
    <div id=inner>
      <div id=animating></div>
    <div>
  </div>
</template>
<script>
  test((t) => {
    main.append(test_keyframes.content.cloneNode(true));
    t.add_cleanup(() => main.replaceChildren());
    assert_equals(getComputedStyle(animating).backgroundColor, 'rgb(0, 128, 0)');
  }, '@keyframes is unaffected by @scope');
</script>

<template id=test_keyframes_non_matching>
  <style>
    @scope (#nomatch) {
      @keyframes --my-anim {
        from { background-color: rgb(0, 128, 0); }
        to { background-color: rgb(0, 128, 0); }
      }
    }
    #animating {
      animation: --my-anim 1000s linear;
    }
  </style>
  <div id=animating></div>
</template>
<script>
  test((t) => {
    main.append(test_keyframes_non_matching.content.cloneNode(true));
    t.add_cleanup(() => main.replaceChildren());
    assert_equals(getComputedStyle(animating).backgroundColor, 'rgb(0, 128, 0)');
  }, '@keyframes is unaffected by non-matching @scope');
</script>

<template id=test_property>
  <style>
    @scope (#inner) {
      @property --my-prop {
        syntax: "<length>";
        initial-value: 1px;
        inherits: false;
      }
    }
    @scope (#outer) {
      @property --my-prop {
        syntax: "<length>";
        initial-value: 2px;
        inherits: false;
      }
    }
  </style>
  <div id=outer>
    <div id=inner>
      <div id=subject></div>
    <div>
  </div>
</template>
<script>
  test((t) => {
    main.append(test_property.content.cloneNode(true));
    t.add_cleanup(() => main.replaceChildren());
    assert_equals(getComputedStyle(subject).getPropertyValue('--my-prop'), '2px');
  }, '@property is unaffected by @scope');
</script>

<template id=test_property_non_matching>
  <style>
    @scope (#nomatch) {
      @property --my-prop {
        syntax: "<length>";
        initial-value: 2px;
        inherits: false;
      }
    }
  </style>
  <div id=subject></div>
</template>
<script>
  test((t) => {
    main.append(test_property_non_matching.content.cloneNode(true));
    t.add_cleanup(() => main.replaceChildren());
    assert_equals(getComputedStyle(subject).getPropertyValue('--my-prop'), '2px');
  }, '@property is unaffected by non-matching @scope');
</script>
chromium/third_party/blink/web_tests/external/wpt/css/css-cascade/scope-name-defining-rules.html
