css/css-color/filters-under-will-change-opacity.html

<!DOCTYPE html>
<html class="reftest-wait">
<link rel="help" href="http://www.w3.org/TR/css3-color/#transparency">
<link rel="match" href="composited-filters-under-opacity-ref.html">
<script src="/common/rendering-utils.js"></script>
<script src="/common/reftest-wait.js"></script>
<style>
div {
  position: absolute;
  will-change: opacity;
}
.filter {
  width: 100px;
  height: 150px;
  position: absolute;
  background: yellow;
  filter: invert(100%);
}
</style>
Below should be a light blue square in uniform color.
<div id="target" style="opacity: 1">
  <div class="filter" style="left: 0"></div>
  <div class="filter" style="left: 50px"></div>
</div>
<script>
waitForAtLeastOneFrame().then(() => {
  target.style.opacity = 0.5;
  takeScreenshot();
});
</script>
</html>