<title>CSS Selectors nested invalidation on changed child</title>

<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">

<link rel="help" href="https://drafts.csswg.org/css-nesting-1/">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

.a {

color: green;

}

.a {

& .b {

color: red;

}

}

<div id="container" class="a">

<div id="child" class="b">

Test passes if color is green.

</div>

test(() => {

let container = document.getElementById('container');

let child = document.getElementById('child');

assert_equals(getComputedStyle(child).color, 'rgb(255, 0, 0)');

child.classList.remove('b');

assert_equals(getComputedStyle(child).color, 'rgb(0, 128, 0)');

});