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55 lines
1.9 KiB
HTML
55 lines
1.9 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Shadow DOM: slotchange customelements</title>
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<meta name="author" title="Surma" href="mailto:surma@google.com">
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<link rel="help" href="https://dom.spec.whatwg.org/#signaling-slot-change">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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</head>
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<body>
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<slots-in-constructor id="constructor-upgrade"><div></div></slots-in-constructor>
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<slots-in-callback id="callback-upgrade"><div></div></slots-in-callback>
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<script>
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var calls = [];
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class SlotsInConstructor extends HTMLElement {
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constructor() {
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super();
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this.attachShadow({mode: 'open'});
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this.shadowRoot.innerHTML = '<slot></slot>';
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var slot = this.shadowRoot.children[0];
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slot.addEventListener('slotchange', function() {
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calls.push(this.id);
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}.bind(this));
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}
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}
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customElements.define('slots-in-constructor', SlotsInConstructor);
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class SlotsInCallback extends HTMLElement {
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constructor() {
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super();
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}
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connectedCallback() {
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this.attachShadow({mode: 'open'});
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this.shadowRoot.innerHTML = '<slot></slot>';
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var slot = this.shadowRoot.children[0];
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slot.addEventListener('slotchange', function() {
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calls.push(this.id);
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}.bind(this));
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}
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}
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customElements.define('slots-in-callback', SlotsInCallback);
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</script>
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<slots-in-constructor id="constructor-parser"><div></div></slots-in-constructor>
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<slots-in-callback id="callback-parser"><div></div></slots-in-callback>
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<script>
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test(function () {
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assert_true(calls.includes("constructor-parser"));
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assert_true(calls.includes("callback-parser"));
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assert_true(calls.includes("constructor-upgrade"));
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assert_true(calls.includes("callback-upgrade"));
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}, 'slotchange must fire on initialization of custom elements with slotted children');
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done();
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</script>
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</body>
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</html>
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