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<!doctype html>
<meta charset="utf-8" />
<title>:has-slotted with manual assignment</title>
<link rel="help" href="https://github.com/w3c/csswg-drafts/pull/10586" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<test-element id="host"></test-element>
<script>
customElements.define('test-element', class extends HTMLElement {
connectedCallback() {
this.attachShadow({mode: 'open', slotAssignment: 'manual'});
this.shadowRoot.append(document.createElement('slot'))
}
assign(...nodes) {
this.shadowRoot.querySelector('slot').assign(...nodes)
}
});
const slot = host.shadowRoot.querySelector('slot');
test(function () {
assert_equals(slot.assignedNodes().length, 0, "slot element should not match :has-slotted");
assert_equals(host.shadowRoot.querySelectorAll(':has-slotted').length, 0, "slot element should not match :has-slotted");
assert_false(slot.matches(':has-slotted'), "slot element should not match :has-slotted");
}, ":has-slotted does not match or querySelector with no manual assigned nodes");
test(function () {
host.append(document.createElement("div"));
assert_equals(slot.assignedNodes().length, 0, "slot element should not match :has-slotted");
assert_equals(host.shadowRoot.querySelectorAll(':has-slotted').length, 0, "slot element should not match :has-slotted");
assert_false(slot.matches(':has-slotted'), "slot element should not match :has-slotted");
}, ":has-slotted does not match or querySelector with no manual assigned nodes - 2");
test(function () {
host.assign(...host.children);
assert_equals(slot.assignedNodes().length, 1, "slot element should match :has-slotted with 1 child node");
assert_equals(host.shadowRoot.querySelectorAll(':has-slotted').length, 1, "slot element should match :has-slotted with 1 child node");
assert_true(slot.matches(':has-slotted'), "slot element should match :has-slotted with 1 child node");
}, ":has-slotted does match when a child is manually assigned");
test(function () {
host.assign();
assert_equals(slot.assignedNodes().length, 0, "slot element should not match :has-slotted after empty");
assert_equals(host.shadowRoot.querySelectorAll(':has-slotted').length, 0, "slot element should not match :has-slotted after empty");
assert_false(slot.matches(':has-slotted'), "slot element should not match :has-slotted after empty");
}, ":has-slotted no longer matches when no children become manually assigned");
</script>
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