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<!DOCTYPE html>
<html lang="en" class="reftest-wait" reftest-async-scroll>
<meta charset="utf-8">
<title>Bug 1266161 - Black boxes during scrolling</title>
<style type="text/css">
html, body {
margin: 0;
height: 100%;
}
body {
outline: 2px solid white;
}
#scrollbox {
overflow: auto;
will-change: transform, scroll-position;
height: 500px;
width: 500px;
}
#scrolled {
padding-top: 1px;
height: 1200px;
}
p {
height: 20px;
background: white;
margin-top: 16px;
}
span, em {
display: block;
background: white;
width: 134px;
height: 14px;
margin-top: 32px;
}
em {
width: 10px;
}
</style>
<div id="scrollbox"
reftest-displayport-x="0"
reftest-displayport-y="0"
reftest-displayport-w="500"
reftest-displayport-h="500">
<div id="scrolled">
<p></p>
<p></p>
<p></p>
<span style="margin-top: 48px"></span>
<span style="margin-top: 64px"></span>
<span style="margin-top: 96px"></span>
<span style="margin-top: 96px"></span>
<em></em>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
</div>
</div>
<script>
var scrollbox = document.getElementById("scrollbox");
var pos = [ 170, 100, 248, 182, 130, 80 ];
var i = 0;
function scrollToNextPos() {
scrollbox.scrollTop = pos[i++];
}
scrollToNextPos();
window.addEventListener("MozReftestInvalidate", function () {
requestAnimationFrame(function scrollAndScheduleNext() {
scrollToNextPos();
if (i < pos.length) {
requestAnimationFrame(scrollAndScheduleNext);
} else {
document.documentElement.className = "";
}
});
});
</script>
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