cssstyledeclaration-mutationrecord-004.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /css/cssom/cssstyledeclaration-mutationrecord-004.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<title>CSSOM: CSSStyleDeclaration.removeProperty doesn't queue a mutation record when not actually removed</title>

<link rel="help" href="https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-setpropertyvalue">

<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">

<script src=/resources/testharness.js></script>

<script src=/resources/testharnessreport.js></script>

<script>

  let test = async_test("CSSStyleDeclaration.removeProperty doesn't queue a mutation record when not actually removed");

  document.documentElement.style.top = "0";

  let m = new MutationObserver(test.unreached_func("shouldn't queue a mutation record"));

  m.observe(document.documentElement,  { attributes: true });

  document.documentElement.style.removeProperty("width");

  requestAnimationFrame(() => test.done());

</script>