css/css-ui/inheritance.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Inheritance of CSS Basic User Interface properties</title>
<link rel="help" href="https://drafts.csswg.org/css-ui/#property-index">
<meta name="assert" content="Properties inherit or not according to the spec.">
<meta name="assert" content="Properties have initial values according to the spec.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/inheritance-testcommon.js"></script>
</head>
<body>
<div id="reference"></div>
<div id="container">
  <div id="target"></div>
</div>
<style>
#reference {
  border-style: dotted; /* Avoid border-top-width computed style 0 */
  border-top-width: medium;
  color: lime;
  background: blue;
}

#container, #target {
  outline-style: dotted; /* Avoid outline-width computed style 0 */
  color: lime;
  background: blue;
}
</style>
<script>
const mediumWidth = getComputedStyle(reference).borderTopWidth; // e.g. 3px
const currentColor = getComputedStyle(reference).color;

assert_not_inherited('appearance', 'none', 'auto');
assert_inherited('caret-color', currentColor, 'rgba(42, 53, 64, 0.75)');
assert_inherited('caret-shape', 'auto', 'bar');
assert_inherited('cursor', 'auto', 'pointer');
assert_not_inherited('nav-down', 'auto', '#foo');
assert_not_inherited('nav-left', 'auto', '#foo');
assert_not_inherited('nav-right', 'auto', '#foo');
assert_not_inherited('nav-up', 'auto', '#foo');
assert_not_inherited('outline-color', currentColor, 'rgba(42, 53, 64, 0.75)');
assert_not_inherited('outline-offset', '0px', '10px');
assert_not_inherited('outline-style', 'none', 'auto');
assert_not_inherited('outline-width', mediumWidth, '10px');
assert_not_inherited('resize', 'none', 'vertical');
assert_not_inherited('user-select', 'auto', 'none');
</script>
</body>
</html>