author Cosmin Sabou <>
Sun, 05 Feb 2023 19:37:33 +0000
changeset 651812 d8601249f1eb8c52c742b0c19c9ca0fa8f2e31fe
parent 561522 56ae50e51c45e451441aa495d338d591cec359d8
permissions -rw-r--r--
Bug 1806090 - temporarily disable browser_quickactions.js on linux for frequent failures. r=intermittent-reviewers,MasterWayZ Differential Revision:

  <title>APZ hit-testing with backface-visibility:hidden</title>
  <script type="application/javascript" src="apz_test_utils.js"></script>
  <script type="application/javascript" src="apz_test_native_event_utils.js"></script>
  <script src="/tests/SimpleTest/paint_listener.js"></script>
  <meta name="viewport" content="width=device-width"/>
      height: 100%;
      margin: 0;
      transform-style: preserve-3d;
    #back, #front{
      backface-visibility: hidden;
      position: absolute;
      width: 100%;
      height: 100%
      width: 100%;
      height: 200%;
      background: linear-gradient(blue, green);
      transform: rotateY(180deg);
  <div id="front">
    <div id="content"></div>
  <div id="back"></div></body>
<script type="application/javascript">

async function test() {
  var config = getHitTestConfig();

  var subframe = document.getElementById("front");

  // Set a displayport to ensure the subframe is layerized.
  // This is not required for exercising the behavior we want to test,
  // but it's needed to be able to assert the results reliably.
  config.utils.setDisplayPortForElement(0, 0, 1000, 1000, subframe, 1);
  await promiseApzFlushedRepaints();

  var subframeViewId = config.utils.getViewId(subframe);

  var {scrollId} = hitTest(centerOf(subframe));

  is(scrollId, subframeViewId,
     "hit the scroll frame behind the backface-visibility:hidden element");

.then(subtestDone, subtestFailed);