gecko-dev/layout/reftests/display-list/1443027-1.html

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HTML

<!DOCTYPE html>
<html lang="en" class="reftest-wait"><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"><meta charset="utf-8">
<title>Bug 1443027 - Test merging across multiple paints</title>
<style>
body { opacity: 0.9; }
div {
position: absolute;
}
#A {
left: 250px;
top: 50px;
width: 100px;
height: 100px;
background-color: red;
}
#B {
left: 200px;
top: 0px;
width: 100px;
height: 100px;
background-color: yellow;
}
#C {
left: 0px;
top: 0px;
width: 100px;
height: 100px;
background-color: green;
}
#D {
left: 80px;
top: 20px;
width: 140px;
height: 100px;
background-color: blue;
}
</style>
</head>
<body>
<div id="A"></div>
<div id="B"></div>
<div id="C"></div>
<div id="D"></div>
<script>
var A = document.getElementById("A");
var B = document.getElementById("B");
var C = document.getElementById("C");
var D = document.getElementById("D");
A.style.visibility = "hidden";
B.style.visibility = "hidden";
C.style.visibility = "hidden";
D.style.visibility = "hidden";
window.addEventListener("MozReftestInvalidate", step1);
function step1() {
C.style.visibility = "visible";
C.style.transform = "translatez(1px)";
D.style.visibility = "visible";
D.style.transform = "translatez(1px)";
window.requestAnimationFrame(function() { window.requestAnimationFrame(step2); });
}
function step2() {
A.style.visibility = "visible";
A.style.transform = "translatez(1px)";
B.style.visibility = "visible";
B.style.transform = "translatez(1px)";
window.requestAnimationFrame(step3);
}
function step3() {
D.style.visibility = "hidden";
D.style.transform = "";
document.documentElement.removeAttribute('class');
}
</script>
</body></html>