File: cssstyledeclaration-mutationrecord-004.html

package info (click to toggle)
thunderbird 1%3A128.14.0esr-1~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 4,334,824 kB
  • sloc: cpp: 7,391,917; javascript: 5,617,271; ansic: 3,833,216; python: 1,230,742; xml: 619,690; asm: 456,022; java: 179,892; sh: 118,796; makefile: 21,908; perl: 14,825; objc: 12,399; yacc: 4,583; pascal: 2,973; lex: 1,720; ruby: 1,190; exp: 762; sql: 674; awk: 580; php: 436; lisp: 430; sed: 70; csh: 10
file content (16 lines) | stat: -rw-r--r-- 874 bytes parent folder | download | duplicates (28) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
<!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>