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flexbox-paint-ordering-002.xhtml
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flexbox-paint-ordering-002.xhtml
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<?xml version="1.0" encoding="UTF-8"?>
<!--
Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/
-->
<!-- Testcase with flex items containing overlapping content, with
"order" and "z-index" set on some of them, to test how that affects
paint-order. -->
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>CSS Test: Testing the paint-order of overlapping flex items with 'order' and 'z-index' set</title>
<link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com"/>
<link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#painting"/>
<link rel="match" href="flexbox-paint-ordering-002-ref.xhtml"/>
<style>
body {
line-height: 0;
}
.flexbox {
display: inline-flex;
width: 20px;
height: 10px;
border: 2px solid gray;
margin-bottom: 10px;
margin-right: 10px;
}
.a {
width: 10px;
height: 10px;
background: lightblue;
min-width: 0;
}
.b {
width: 10px;
height: 10px;
background: pink;
min-width: 0;
}
.aKid {
margin-left: 3px;
margin-top: 3px;
width: 10px;
height: 10px;
background: steelblue;
border: 1px solid blue;
}
.bKid {
margin-left: 3px;
margin-top: 6px;
width: 10px;
height: 10px;
background: violet;
border: 1px solid purple;
}
.on1 { order: -1; }
.o0 { order: 0; }
.o1 { order: 1; }
.o2 { order: 2; }
.zn2 { z-index: -2; }
.zn1 { z-index: -1; }
.z0 { z-index: 0; }
.z1 { z-index: 1; }
</style>
</head>
<body>
<!-- order not set: -->
<div class="flexbox">
<div class="a"><div class="aKid"/></div>
<div class="b"><div class="bKid"/></div>
</div>
<br/>
<!-- order set, but it matches content order, so it shouldn't matter: -->
<div class="flexbox">
<div class="a on1"><div class="aKid"/></div>
<div class="b"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a o0"><div class="aKid"/></div>
<div class="b"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a o0"><div class="aKid"/></div>
<div class="b o0"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a o2"><div class="aKid"/></div>
<div class="b o2"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a"><div class="aKid"/></div>
<div class="b o0"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a"><div class="aKid"/></div>
<div class="b o1"><div class="bKid"/></div>
</div>
<br/>
<!-- order set to reverse of content-order: -->
<div class="flexbox">
<div class="a o1"><div class="aKid"/></div>
<div class="b"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a"><div class="aKid"/></div>
<div class="b on1"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a o0"><div class="aKid"/></div>
<div class="b on1"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a o2"><div class="aKid"/></div>
<div class="b o1"><div class="bKid"/></div>
</div>
<br/>
<!-- order set to reverse of content-order, AND with z-index set on
one or both items, but not such that it changes the paint order -->
<div class="flexbox">
<div class="a o1 z0"><div class="aKid"/></div>
<div class="b"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a o1 z1"><div class="aKid"/></div>
<div class="b"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a o1 z0"><div class="aKid"/></div>
<div class="b z0"><div class="bKid"/></div>
</div
><div class="flexbox">
<div class="a o1 z1"><div class="aKid"/></div>
<div class="b z0"><div class="bKid"/></div>
</div>
<br/>
<!-- order set to reverse of content-order, AND with z-index set on
one or both items, in such a way that it affects paint order -->
<div class="flexbox">
<!-- 'a' is behind the container's border -->
<div class="a o1 zn1"><div class="aKid"/></div>
<div class="b"><div class="bKid"/></div>
</div
><div class="flexbox">
<!-- 'a' and 'b' are both behind the container's border -->
<div class="a o1 zn1"><div class="aKid"/></div>
<div class="b zn1"><div class="bKid"/></div>
</div
><div class="flexbox">
<!-- 'a' and 'b' are both behind the container's border,
and 'a' is behind 'b' despite coming after it in the 'order'
ordering-->
<div class="a o1 zn2"><div class="aKid"/></div>
<div class="b zn1"><div class="bKid"/></div>
</div
><div class="flexbox">
<!-- 'a' and 'b' are both in front of the container's border,
and 'a' is behind 'b' despite coming after it in the 'order'
ordering-->
<div class="a o1 z0"><div class="aKid"/></div>
<div class="b z1"><div class="bKid"/></div>
</div>
</body>
</html>