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<!DOCTYPE html>
<html lang="en" class="reftest-wait">
<meta charset="utf-8">
<title>Scrollboxes with uniform backgrounds should pull that color into their contents, even if those contents have an animated position</title>
<style>
div {
min-height: 50px;
box-model: border-box;
}
.first, .second {
border: 1px solid blue;
margin: 50px 0;
position: relative;
}
.border {
border: 1px solid black;
}
.scrollable {
height: auto;
overflow: auto;
}
.scrollarea {
width: 5000px;
border: none;
padding: 10px 0 20px;
height: auto;
}
.scrolled {
margin-left: 220px;
width: 100px;
height: 100px;
border-color: red;
}
.animated-position {
position: relative;
left: 20px;
}
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="scrollable border">
<div class="scrollarea">
<div class="scrolled border animated-position reftest-no-paint 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 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;
var animatedLeft = document.querySelector(".animated-position");
function doTest() {
animatedLeft.style.left = "100px";
document.documentElement.removeAttribute("class");
}
// Layerize #animatedLeft
animatedLeft.offsetLeft;
animatedLeft.style.left = "40px";
animatedLeft.offsetLeft;
animatedLeft.style.left = "60px";
animatedLeft.offsetLeft;
document.addEventListener("MozReftestInvalidate", doTest, false);
</script>
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