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contain-layout-ignored-cases-ib-split-001.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Test: 'contain: layout' should have no effect on non-atomic inline
(including its block part, if there's a block-in-inline split)</title>
<link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
<link rel="help" href="https://drafts.csswg.org/css-contain/#containment-layout">
<link rel="match" href="contain-layout-ignored-cases-ib-split-001-ref.html">
<style>
.abspos-box {
position: absolute;
width: 200px;
height: 200px;
}
/* The boxes should stack in the order that I've listed their CSS classes
here. The class names' first word (outside/before/inside/after) refers
to the boxes' DOM position, and "background"/"midground"/"foreground"
refers to their z-index values. */
.before-IB-background {
background: darkmagenta;
z-index: -1;
top: 50px;
left: 50px;
}
.after-IB-background {
background: magenta;
z-index: -1;
top: 70px;
left: 70px;
}
.outside-span-midground {
background: darkkhaki;
top: 90px;
left: 90px;
}
.inside-IB-midground {
background: khaki;
top: 110px;
left: 110px;
}
.before-IB-foreground {
background: darkcyan;
z-index: 1;
top: 130px;
left: 130px;
}
.after-IB-foreground {
background: cyan;
z-index: 1;
top: 150px;
left: 150px;
}
</style>
</head>
<body>
<!-- The expectation here is that 'abspos-box' elements will all interact in
the same top-level stacking context. That means the box ordering should
be (back to front): darkmagenta/magenta/darkkhaki/khaki/darkcyan/cyan,
with the boxes stacked (visually) from top-left to bottom-right. -->
<div class="abspos-box outside-span-midground"></div>
<span style="contain: layout">
<div class="abspos-box before-IB-background"></div>
<div class="abspos-box before-IB-foreground"></div>
<!-- This unstyled div crates the IB split: -->
<div>
<div class="abspos-box inside-IB-midground"></div>
</div>
<div class="abspos-box after-IB-background"></div>
<div class="abspos-box after-IB-foreground"></div>
</span>
</body>
</html>