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<!DOCTYPE html>
<html lang="en" reftest-async-scroll>
<meta charset="utf-8">
<title>Scrollboxes with uniform backgrounds should pull that color into their contents, even if these contents are wider than the uniform area behind the scrollbox</title>
<!--
Very similar to pull-background-displayport-2.html, but with a .scrolled element that is
wider than the scrollbox.
-->
<style>
div {
min-height: 50px;
box-model: border-box;
}
.first, .second {
border: 1px solid blue;
margin: 50px 0;
}
.border {
border: 1px solid black;
}
.scrollable {
height: 150px;
overflow: auto;
}
.scrollarea {
width: 5000px;
border: none;
padding: 10px 0 20px;
height: auto;
}
.scrolled {
margin-left: 220px;
width: 2000px;
height: 100px;
border-color: red;
}
.opacity {
opacity: 0.9;
}
body {
margin: 0;
padding: 0 100px;
height: 3000px;
}
</style>
<div class="first" reftest-assigned-layer="page-background">
<!--
This is just a regular box, it should end up in the page background layer.
-->
</div>
<div class="opacity border">
<div class="scrollable"
reftest-displayport-x="0" reftest-displayport-y="0"
reftest-displayport-w="2000" reftest-displayport-h="200">
<div class="scrollarea">
<div class="scrolled border reftest-opaque-layer">
<!--
The background of .scrollable is uniform and opaque,
.scrolled should be able to pull up that background color and become
opaque itself.
-->
</div>
</div>
</div>
</div>
<div class="second" reftest-assigned-layer="page-background">
<!--
This should share a layer with .first and the page background.
-->
</div>
<script>
var scrollable = document.querySelector(".scrollable");
// Make .scrollable start out with active scrolling.
scrollable.scrollLeft = 0;
scrollable.scrollLeft = 20;
</script>
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