wpt / css / css-overflow / scroll-markers / scroll-marker-target-before-after.html

Status: FAIL | Duration: 53ms | Subtests: 0/6 | Open test on wpt.live | wpt.fyi

TestTest SourceSubtests (0/6)

Data from commit:
a50cb89 wpt: run reference-named files which are themselves tests (#836) (2026-09-03)

SubtestStatusMessage
0th scroll marker testFAILpromise_test: Unhandled rejection with value: object "TypeError: cannot convert 'null' or 'undefined' to object"
1th scroll marker testFAILpromise_test: Unhandled rejection with value: object "TypeError: cannot convert 'null' or 'undefined' to object"
2th scroll marker testFAILpromise_test: Unhandled rejection with value: object "TypeError: cannot convert 'null' or 'undefined' to object"
3th scroll marker testFAILpromise_test: Unhandled rejection with value: object "TypeError: cannot convert 'null' or 'undefined' to object"
4th scroll marker testFAILpromise_test: Unhandled rejection with value: object "TypeError: cannot convert 'null' or 'undefined' to object"
5th scroll marker testFAILpromise_test: Unhandled rejection with value: object "TypeError: cannot convert 'null' or 'undefined' to object"

/css/css-overflow/scroll-markers/scroll-marker-target-before-after.html

<!doctype html>
<meta charset="utf-8">
<title>CSS Test: :target-before and :target-after on ::scroll-marker</title>
<link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-marker-pseudo">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/11600">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/css-transitions/support/helper.js"></script>
<style>
  .scroller {
    width: 600px;
    height: 300px;
    overflow: scroll;
    scroll-marker-group: after;
  }

  .scroller div {
    width: 600px;
    height: 300px;
    margin-bottom: 20px;
    background: green;
  }

  .scroller::scroll-marker-group {
    border: 3px solid black;
    padding: 5px;
    height: 20px;
    display: block;
  }

  .scroller div::scroll-marker {
    content: "";
    width: 10px;
    height: 10px;
    background-color: blue;
    border-radius: 100%;
    display: inline-block;
  }

  .scroller div::scroll-marker:target-current {
    background-color: green;
  }

  .scroller div::scroll-marker:target-before {
    background-color: red;
  }

  .scroller div::scroll-marker:target-after {
    background-color: yellow;
  }
</style>
<div class="scroller">
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
</div>
<script>
  function checkScrollMarkers(markerTargets, targetCurrentIndex) {
    for (let i = 0; i < markerTargets.length; ++i) {
      if (i < targetCurrentIndex) {
        assert_equals(getComputedStyle(markerTargets[i], "::scroll-marker").backgroundColor, "rgb(255, 0, 0)", "::scroll-marker before the :target-current one should be red as :target-before");
      } else if (i === targetCurrentIndex) {
        assert_equals(getComputedStyle(markerTargets[i], "::scroll-marker").backgroundColor, "rgb(0, 128, 0)", "the :target-current ::scroll-marker should be green");
      } else {
        assert_equals(getComputedStyle(markerTargets[i], "::scroll-marker").backgroundColor, "rgb(255, 255, 0)", "::scroll-marker before the :target-current one should be yellow as :target-after");
      }
    }
  }
  const scroller = document.querySelector(".scroller");
  const markerTargets = scroller.querySelectorAll("div");
  for (let i = 0; i < markerTargets.length; ++i) {
    promise_test(async t => {
      // Make i-th scroll marker :target-current.
      markerTargets[i].scrollIntoView();
      await waitForAnimationFrames(2);
      // Check the :target-before/:target-after relations on all scroll markers.
      checkScrollMarkers(markerTargets, i);
    }, i + "th scroll marker test");
  }
</script>