wpt/css/cssom-view/scrollWidthHeight-negative-margin-001.html at master · web-platform-tests/wpt · GitHub

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<!doctype html>
<meta charset="utf-8">
<title>scroll{Width,Height} with visible overflow and negative margins.</title>
<link rel="help" href="https://drafts.csswg.org/cssom-view/#extension-to-the-element-interface">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1906475">
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<style>
body { margin: 0 }
.wrapper {
  width: 90px;
  border: 10px solid #d1d1d2;
}
.inner {
  margin: -10px;
  height: 100px;
  width: 100px;
  background-color: blue;
}
</style>
<div class="wrapper" style="overflow: visible">
  <div class="inner"></div>
</div>
<div class="wrapper" style="overflow: hidden">
  <div class="inner"></div>
</div>
<div class="wrapper" style="overflow: auto">
  <div class="inner"></div>
</div>
<div class="wrapper" style="overflow: clip">
  <div class="inner"></div>
</div>
<script>
for (let wrapper of document.querySelectorAll(".wrapper")) {
  test(function() {
    assert_equals(wrapper.scrollWidth, 90, "scrollWidth");
    assert_equals(wrapper.scrollHeight, 90, "scrollHeight");
  }, "scrollWidth/Height with negative margins: " + wrapper.style.cssText);
}
</script>