wpt / css / css-overflow / scroll-markers / scroll-markers-nested-scrollers.html

Status: FAIL | Duration: 45ms | Subtests: 0/1 | Open test on wpt.live | wpt.fyi

TestTest Source

/css/css-overflow/scroll-markers/scroll-markers-nested-scrollers.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Overflow Test: scroll tracking for ::scroll-marker in nested scrollers</title>
<link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-container-scroll">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/css-transitions/support/helper.js"></script>
<style>
  #a,
  #b,
  #b0 {
    overflow: scroll;
    height: 100px;
    width: 100px;
  }

  #a,
  #b {
    scroll-marker-group: after;
  }

  #a::scroll-marker-group,
  #b::scroll-marker-group {
    border: 1px solid black;
    display: flex;
    height: 20px;
  }

  .marker-source {
    height: 100px;
    width: 100px;
  }

  #b::scroll-marker,
  #b0::scroll-marker,
  #c::scroll-marker,
  #c0::scroll-marker {
    content: '';
    background-color: red;
    display: inline-flex;
    width: 10px;
    height: 10px;
    border-radius: 50%;
  }

  #b::scroll-marker:target-current,
  #b0::scroll-marker:target-current,
  #c::scroll-marker:target-current,
  #c0::scroll-marker:target-current {
    background-color: green;
  }
</style>
<div id="a">
  <div id="b0" class="marker-source"></div>
  <div id="b" class="marker-source">
    <div id="c0" class="marker-source"></div>
    <div id="c" class="marker-source"></div>
  </div>
</div>
<script>
  const GREEN = "rgb(0, 128, 0)";
  const RED = "rgb(255, 0, 0)";

  function assertPseudoElementProperty(originatingElement, pseudoType, backgroundColor) {
    const pseudoStyle = getComputedStyle(originatingElement, pseudoType);
    const pseudoBackgroundColor = pseudoStyle.getPropertyValue('background-color');
    assert_equals(pseudoBackgroundColor, backgroundColor, pseudoType +
      " background-color for #" + originatingElement.id + " should be " + backgroundColor.toString() +
      " but was " + pseudoBackgroundColor.toString());
  }

  promise_test(async (t) => {
    await waitForAnimationFrames(2);
    assertPseudoElementProperty(b0, "::scroll-marker", GREEN);
    assertPseudoElementProperty(b, "::scroll-marker", RED);
    assertPseudoElementProperty(c0, "::scroll-marker", GREEN);
    assertPseudoElementProperty(c, "::scroll-marker", RED);

    c.scrollIntoView();
    await waitForAnimationFrames(2);

    assertPseudoElementProperty(b0, "::scroll-marker", RED);
    assertPseudoElementProperty(b, "::scroll-marker", GREEN);
    assertPseudoElementProperty(c0, "::scroll-marker", RED);
    assertPseudoElementProperty(c, "::scroll-marker", GREEN);
  }, "scrollIntoView in nested scrollers selects correct ::scroll-marker in both ancestor groups");
</script>