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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" title="Keith Cirkel" href="mailto:wpt@keithcirkel.co.uk" />
<link rel="help" href="https://html.spec.whatwg.org/multipage/custom-elements.html#custom-state-pseudo-class" />
<title>:state() css selector applies to nth-of selectors</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<custom-state id="myCE">First Element</custom-state>
<p id="mySibling">First Sibling</p>
<custom-state id="myCE2">Second Element</custom-state>
<p id="mySibling2">Second Sibling</p>
<style>
:nth-child(1), :nth-child(2) {
color: #f00;
}
:nth-child(2 of :state(--green)) {
color: #0f0;
}
:nth-child(2 of :state(--green)) + p {
color: #00f;
}
</style>
<script>
customElements.define('custom-state', class extends HTMLElement {
connectedCallback() {
this.elementInternals = this.attachInternals();
}
});
test(function(t) {
t.add_cleanup(() => { myCE.elementInternals.states.delete('--green') });
t.add_cleanup(() => { myCE2.elementInternals.states.delete('--green') });
assert_false(myCE.elementInternals.states.has('--green'));
assert_equals(getComputedStyle(myCE).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(myCE2).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling2).getPropertyValue('color'), 'rgb(255, 0, 0)');
myCE.elementInternals.states.add('--green');
assert_true(myCE.elementInternals.states.has('--green'));
assert_equals(getComputedStyle(myCE).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(myCE2).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling2).getPropertyValue('color'), 'rgb(255, 0, 0)');
myCE2.elementInternals.states.add('--green');
assert_true(myCE2.elementInternals.states.has('--green'));
assert_equals(getComputedStyle(myCE).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(myCE2).getPropertyValue('color'), 'rgb(0, 255, 0)');
assert_equals(getComputedStyle(mySibling).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling2).getPropertyValue('color'), 'rgb(0, 0, 255)');
}, "state selector has influence on nth-of when state is applied");
test(function(t) {
t.add_cleanup(() => { myCE.elementInternals.states.delete('--foo') });
t.add_cleanup(() => { myCE2.elementInternals.states.delete('--foo') });
myCE.elementInternals.states.add('--foo');
myCE2.elementInternals.states.add('--foo');
assert_false(myCE.elementInternals.states.has('--green'));
assert_true(myCE.elementInternals.states.has('--foo'));
assert_false(myCE2.elementInternals.states.has('--green'));
assert_true(myCE2.elementInternals.states.has('--foo'));
assert_equals(getComputedStyle(myCE).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(myCE2).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling2).getPropertyValue('color'), 'rgb(255, 0, 0)');
}, "state selector only applies on given ident");
test(function(t) {
myCE.elementInternals.states.add('--green');
myCE.elementInternals.states.add('--foo');
myCE2.elementInternals.states.add('--green');
myCE2.elementInternals.states.add('--foo');
assert_true(myCE.elementInternals.states.has('--green'));
assert_true(myCE.elementInternals.states.has('--foo'));
assert_equals(getComputedStyle(myCE).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(myCE2).getPropertyValue('color'), 'rgb(0, 255, 0)');
assert_equals(getComputedStyle(mySibling).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling2).getPropertyValue('color'), 'rgb(0, 0, 255)');
myCE.elementInternals.states.clear();
assert_equals(getComputedStyle(myCE).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(myCE2).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling).getPropertyValue('color'), 'rgb(255, 0, 0)');
assert_equals(getComputedStyle(mySibling2).getPropertyValue('color'), 'rgb(255, 0, 0)');
}, "style is invalided on clear()");
</script>
</body>
</html>
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