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supports-rule.html
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<!DOCTYPE html>
<title>@supports with nesting</title>
<link rel="author" title="Matthieu Dubet" href="mailto:m_dubet@apple.com">
<link rel="help" href="https://drafts.csswg.org/css-nesting-1/">
<link rel="match" href="supports-rule-ref.html">
<style>
.test {
background-color: red;
width: 100px;
height: 100px;
display: grid;
}
@supports(not selector(> .test-1)) {
.test-1 {
background-color: green;
}
}
.test {
> .test-2 {
background-color: green;
}
@supports (selector(> .test-2)) {
> .test-2 {
background-color: red;
}
}
}
.test-3 {
@supports (selector(&)) {
& {
background-color: green;
}
}
}
@supports(selector(&)) {
.test-4 {
background-color: green;
}
}
body * + * {
margin-top: 8px;
}
</style>
<body>
<p>Tests pass if <strong>block is green</strong></p>
<div class="test test-1"></div>
<div class="test"><div class="test-2"></div></div>
<div class="test test-3"></div>
<div class="test test-4"></div>
</body>