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<!doctype html>
<meta charset="utf-8">
<title>CSSOM: CSSStyleDeclaration.setPropertyValue doesn't queue a mutation record for invalid values</title>
<link rel="help" href="https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-setproperty">
<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.setPropertyValue doesn't queue a mutation record when setting invalid values");
let m = new MutationObserver(test.unreached_func("shouldn't queue a mutation record"));
m.observe(document.documentElement, { attributes: true });
document.documentElement.style.width = "-100px";
requestAnimationFrame(() => test.done());
</script>
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