css/css-cascade/revert-val-011.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>CSS Cascade: 'revert' from mutating inline style</title>
  <link rel="help" href="https://drafts.csswg.org/css-cascade/#default">
  <link rel="author" href="mailto:sesse@chromium.org">
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <style>
    .outer {
       left: 1px;
    }
  </style>
</head>
<body>
  <p class="outer" id="el">Test passes if the text is black (not red).</p>
</body>
<script>
test(() => {
  el.offsetTop;
  assert_equals(getComputedStyle(el).left, "1px", "style is set correctly");
});
test(() => {
  el.offsetTop;
  el.style.left = "2px";
  assert_equals(getComputedStyle(el).left, "2px", "style is modified correctly");
});
test(() => {
  el.offsetTop;
  el.style.left = "revert";
  assert_equals(getComputedStyle(el).left, "auto", "style is reverted correctly");
});
</script>
</html>