css/css-pseudo/marker-reverted-styles.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Pseudo-Elements Test: Reverted styles for ::marker</title>
<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#marker-pseudo">
<link rel="help" href="https://drafts.csswg.org/css-cascade-4/#default">
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
<meta name="assert" content="This test checks that ::marker styles can be reverted to UA origin." />
<style>
.revert::marker { all: revert }
.outside { list-style-position: outside }
.inside { list-style-position: inside }
.symbol { list-style-type: symbol }
.decimal { list-style-type: decimal }
.string { list-style-type: "string" }
.marker::marker { content: "marker" }
</style>
<div id="log"></div>
<ul>
  <li class="outside symbol">outside symbol</li>
  <li class="outside decimal">outside decimal</li>
  <li class="outside string">outside string</li>
  <li class="outside marker">outside marker</li>
  <li class="inside symbol">inside symbol</li>
  <li class="inside decimal">inside decimal</li>
  <li class="inside string">inside string</li>
  <li class="inside marker">inside marker</li>
</ul>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
<script>
function getStyles(style) {
  const obj = {};
  for (let i = 0; i < style.length; ++i) {
    const prop = style.item(i);
    obj[prop] = style.getPropertyValue(prop);
  }
  return obj;
}
for (const target of document.querySelectorAll("li")) {
  test(function() {
    const cs = getComputedStyle(target, "::marker");
    const defaultStyles = getStyles(cs);
    target.classList.add("revert");
    const revertedStyles = getStyles(cs);
    assert_object_equals(revertedStyles, defaultStyles);
  }, `Reverted computed values for ${target.className}`);
}
</script>