blob: 8579e2ec771beb4fb07f1c1fd141377e287f7364 [file] [log] [blame]
<!DOCTYPE html>
<html>
<head>
<style>
body {
height: 1200px;
}
.box {
width: 100px;
height: 100px;
margin: 50px;
background-color: blue;
border: 2px solid black;
}
#box {
background-image: linear-gradient(to top, white, black);
background-attachment: fixed;
background-repeat: no-repeat;
}
#box.hidden {
display: none;
}
#box.loaded {
background: transparent;
}
</style>
<script>
if (window.testRunner)
testRunner.dumpAsText();
function doTest()
{
var box = document.getElementById('box');
box.classList.add('hidden');
document.body.offsetWidth;
box.classList.remove('hidden');
document.body.offsetWidth;
box.classList.add('loaded');
if (window.internals)
document.getElementById('reasons').textContent = window.internals.mainThreadScrollingReasons();
}
window.addEventListener('load', doTest, false);
</script>
</head>
<body>
<div id="box" class="box"></div>
<p>Test passes if there are no reasons for slow scrolling below.</p>
<pre id="reasons"></pre>
</body>
</html>