testing/web-platform/tests/css/css-transforms/animation/rotate-animation-with-will-change-transform-001.html


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<!DOCTYPE html>
<title>CSS Test (Transforms): Transform and perspective with w negative</title>
<link rel="author" title="L. David Baron" href="https://dbaron.org/">
<link rel="author" title="Google" href="http://www.google.com/">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=696374">
<link rel="help" href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">
<link rel="match" href="rotate-animation-with-will-change-transform-001-ref.html">

<!--

This is a simplified version of one case within the Blink web test
virtual/threaded-no-composited-antialiasing/animations/composited-animations-rotate-zero-degrees.html
but with will-change: transform added, so that it fails with the bug
that is introduced in the intermediate state of fixing
https://bugs.chromium.org/p/chromium/issues/detail?id=696374

-->

<style>

@keyframes a {
  from { rotate: 0 1 0 44deg; }
  to { rotate: 0 1 0 44deg; }
}

div {
  width: 100px;
  height: 100px;
  animation: a linear 10s infinite;
  /* rotate: 0 1 0 44deg; */
  background: fuchsia;
  transform-origin: 100px 0;
  will-change: transform;
}

</style>

<div></div>