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<!doctype html>
<title>:has() invalidation with :state() pseudo-class</title>
<link rel="author" title="Keith Cirkel" href="mailto:wpt@keithcirkel.co.uk" />
<link rel="help" href="https://drafts.csswg.org/selectors/#relational" />
<link rel="help" href="https://github.com/whatwg/html/pull/8467" />
<style>
#subject {
background-color: #f00;
}
#subject:has(:state(--green)) {
background-color: #0f0;
}
#subject:has(:state(--blue)) {
background-color: #00f;
}
</style>
<body>
Test :state() pseudo-class invalidation with :has()
<div id="subject">
<my-element id="child"></my-element>
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
const RED = "rgb(255, 0, 0)";
const GREEN = "rgb(0, 255, 0)";
const BLUE = "rgb(0, 0, 255)";
test(() => {
customElements.define(
"my-element",
class MyElement extends HTMLElement {
connectedCallback() {
this.elementInternals = this.attachInternals();
}
},
);
assert_equals(getComputedStyle(subject).backgroundColor, RED);
child.elementInternals.states.add("--green");
assert_equals(getComputedStyle(subject).backgroundColor, GREEN);
child.elementInternals.states.clear();
assert_equals(getComputedStyle(subject).backgroundColor, RED);
child.elementInternals.states.add("--blue");
assert_equals(getComputedStyle(subject).backgroundColor, BLUE);
child.elementInternals.states.clear();
assert_equals(getComputedStyle(subject).backgroundColor, RED);
child.elementInternals.states.add("--green");
child.elementInternals.states.add("--blue");
assert_equals(getComputedStyle(subject).backgroundColor, BLUE);
child.elementInternals.states.delete("--blue");
assert_equals(getComputedStyle(subject).backgroundColor, GREEN);
child.elementInternals.states.delete("--green");
assert_equals(getComputedStyle(subject).backgroundColor, RED);
}, "Test :has() invalidation with :state() pseudo-classes");
</script>
</body>
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