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Test Info:

<!DOCTYPE html>
<title>Basic nesting</title>
<link rel="author" title="Adam Argyle" href="mailto:argyle@google.com">
<link rel="help" href="https://drafts.csswg.org/css-nesting-1/">
<link rel="match" href="nesting-basic-ref.html">
<style>
.test {
background-color: red;
width: 30px;
height: 30px;
display: grid;
}
.test-1 {
& > div {
background-color: green;
}
}
.test-2 {
& > div {
background-color: green;
}
}
.test-3 {
& .test-3-child {
background-color: green;
}
}
span > b {
.test-4 section & {
display: inline-block;
background-color: green;
width: 100%;
height: 100%;
}
.test-4 section > & {
background-color: red;
}
}
.test-6 {
&.test {
background-color: green;
}
}
.test-7, .t7- {
& + .test-7-child, &.t7-- {
background-color: green;
}
}
.test-8 {
& {
background-color: green;
}
}
.test-9 {
&:is(.t9-, &.t9--) {
background-color: green;
}
}
.test-10 {
& {
background-color: red;
}
background-color: green;
}
.test-11 {
& {
background-color: red;
}
background-color: green !important;
}
/* & at top level counts as :scope, i.e. the root element here */
& .test-12 {
background-color: green;
}
& > .test-12 {
background-color: red !important;
}
body * + * {
margin-top: 8px;
}
</style>
<body>
<p>Tests pass if <strong>block is green</strong></p>
<div class="test test-1"><div></div></div>
<div class="test test-2"><div></div></div>
<div class="test test-3"><div class="test-3-child"></div></div>
<div class="test test-4">
<section>
<span><b></b></span>
</section>
</div>
<div class="test test-6"><div></div></div>
<div class="test t7- t7--"><div class="test-7-child"></div></div>
<div class="test test-8"><div></div></div>
<div class="test test-9 t9-- t9-"><div></div></div>
<div class="test test-10"><div></div></div>
<div class="test test-11"><div></div></div>
<div class="test test-12"></div>
</body>