<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Containment Test: 'contain: content' does not turn on style containment</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
<link rel="help" href="https://drafts.csswg.org/css-contain/#contain-property">
<link rel="match" href="reference/contain-content-011-ref.html">
<meta name="assert" content="'contain: content' turns on style containment. So, in this test, the counter of div.abspos child should not be reset and must not be reset.">
<style>
body
{
counter-reset: counter-of-abspos-div 17;
}
/*
This creates a new counter identified as
"counter-of-abspos-div" and initially sets
such counter to 17 (an entirely arbitrary
number)
*/
div
{
width: 100px;
}
div#contain-content
{
background-color: red;
contain: content;
height: 100px;
}
div.abspos
{
background-color: green;
height: 50px;
position: absolute;
right: 0;
}
div#contain-content > div.abspos
{
counter-increment: counter-of-abspos-div 4;
}
/*
This increments the counter identified as
"counter-of-abspos-div" of the step value
of 4 (an entirely arbitrary number) each and
every time there is a div.abspos child
within the subtree of div#contain-content
*/
div#first-abspos
{
top: 0px;
}
div#second-abspos
{
bottom: 0px;
}
div#result::after
{
content: counter(counter-of-abspos-div);
font-size: 3em;
}
/*
Now, the generated content is set to the
current value of the counter identified
as "counter-of-abspos-div":
17 + 4 * 2 == 25
*/
</style>
<body>
<p>Test passes if there is a filled green square, no red and the number 17.
<div id="contain-content">
<div id="first-abspos" class="abspos"></div>
<div id="second-abspos" class="abspos"></div>
</div>
<div id="result"></div>
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