Blitz - WPT: overflow-clip-scroll-size.html

wpt / css / css-overflow / overflow-clip-scroll-size.html

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

Subtest	Status	Message
scroll size should match that of size specified by overflow: clip	PASS
scroll size should take into account border size and overflow-clip-margin	FAIL	assert_equals: expected 105 but got 104

Enable JavaScript in test iframe

/css/css-overflow/overflow-clip-scroll-size.html

<!doctype html>
<meta charset="utf-8">
<title>overflow: scroll width/height should return overflow size</title>
<link rel="help" href="https://drafts.csswg.org/css-overflow/#valdef-overflow-clip">
<link rel="author" title="Scott Violet" href="mailto:sky@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  .parent {
    width: 100px;
    height: 101px;
  }
  .child {
    width: 200px;
    height: 201px;
  }
  .overflow_clip_and_border {
    width: 100px;
    height: 101px;
    overflow: clip;
    border-width: 2px;
    border-style: solid;
  }
</style>
<div id="parent-clip-both" class="parent" style="overflow: clip">
  <div class="child"></div>
</div>
<div id="parent-clip-x" class="parent" style="overflow: clip-x">
  <div class="child"></div>
</div>
<div id="parent-clip-y" class="parent" style="overflow: clip-y">
  <div class="child"></div>
</div>

<div id="border-equal-clip" class="parent">
  <div class="overflow_clip_and_border"
       style="overflow-clip-margin: 2px">
    <div class="child"></div>
  </div>
</div>
<div id="border-smaller-clip" class="parent">
  <div class="overflow_clip_and_border"
       style="overflow-clip-margin: 3px">
    <div class="child"></div>
  </div>
</div>
<div id="border-greater-clip" class="parent">
  <div class="overflow_clip_and_border"
       style="overflow-clip-margin: 1px">
    <div class="child"></div>
  </div>
</div>

<script>
test(() => {
  var pClipBoth = document.getElementById("parent-clip-both");
  assert_equals(pClipBoth.scrollWidth, 200);
  assert_equals(pClipBoth.scrollHeight, 201);

  var pClipX = document.getElementById("parent-clip-x");
  assert_equals(pClipX.scrollWidth, 200);
  assert_equals(pClipX.scrollHeight, 201);

  var pClipY = document.getElementById("parent-clip-y");
  assert_equals(pClipY.scrollWidth, 200);
  assert_equals(pClipY.scrollHeight, 201);
}, "scroll size should match that of size specified by overflow: clip");

test(() => {
    assert_equals(document.getElementById("border-equal-clip").scrollWidth,
                  104);

    assert_equals(document.getElementById("border-smaller-clip").scrollWidth,
                  105);

    assert_equals(document.getElementById("border-greater-clip").scrollWidth,
                  104);
}, "scroll size should take into account border size and overflow-clip-margin");

</script>