blob: dff076e78120616f8ac2485cb1a62d5ee79494ee [file] [log] [blame]
<!DOCTYPE html> <!-- webkit-test-runner [ useFlexibleViewport=true internal:AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
<meta name="viewport" content="initial-scale=1.0">
<style>
#scroller {
margin: 10px;
height: 300px;
width: 300px;
border: 1px solid black;
overflow: scroll;
}
.box {
position: relative;
z-index: 0; /* stacking context ancestor is the root */
top: 250px;
width: 200px;
height: 200px;
background-color: blue;
}
.scroll-content {
height: 2000px;
}
</style>
<script>
if (window.testRunner)
testRunner.waitUntilDone();
function getUnstableScrollScript(x, y, scrollX, scrollY)
{
return `(function() {
uiController.scrollUpdatesDisabled = true;
uiController.immediateScrollElementAtContentPointToOffset(${x}, ${y}, ${scrollX}, ${scrollY});
uiController.doAfterPresentationUpdate(function() {
uiController.uiScriptComplete();
});
})();`;
}
function doTest()
{
if (!testRunner.runUIScript)
return
testRunner.runUIScript(getUnstableScrollScript(50, 50, 0, 250), () => {
testRunner.notifyDone();
});
}
window.addEventListener('load', doTest, false);
</script>
</head>
<body>
<div id="scroller">
<div class="scroll-content">
<div class="box"></div>
</div>
</div>
</body>
</html>