opacity-change-twice-stacking-context.html

Enable keyboard shortcuts

This test has a WPT meta file that disables it given conditions:
- os == "linux" : https://bugzilla.mozilla.org/show_bug.cgi?id=1526468
This WPT test may be referenced by the following Test IDs:
- /css/CSS2/stacking-context/opacity-change-twice-stacking-context.html - WPT Dashboard Interop Dashboard

<!doctype HTML>

<html class="reftest-wait">

  <title>CSS Test: Test for re-paint after stacking context changes opacity twice</title>

  <link rel="help" href="https://www.w3.org/TR/CSS2/zindex.html">

  <link rel="match" href="opacity-change-twice-stacking-context-ref.html">

  <script src="/common/reftest-wait.js"></script>

  <div id="target" style="width: 100px; height: 100px; z-index: 1; opacity: 0; background: blue; position: absolute">

  </div>

  <script>

    onload = () => {

      requestAnimationFrame(() => requestAnimationFrame(() => {

        target.style.opacity = 1;

        target.offsetHeight;

        target.style.opacity = 0.9;

        takeScreenshot();

      }));

  </script>

</html>