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<!DOCTYPE html>
<html>
<head>
<title>Custom Elements: disconnectedCallback</title>
<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
<meta name="assert" content="disconnectedCallback must be enqueued whenever custom element is removed from a document">
<link rel="help" href="https://w3c.github.io/webcomponents/spec/custom/#dfn-connected-callback">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./resources/custom-elements-helpers.js"></script>
</head>
<body>
<div id="log"></div>
<script>
var calls = [];
class MyCustomElement extends HTMLElement {
connectedCallback() { calls.push('connected', this); }
disconnectedCallback() { calls.push('disconnected', this); }
}
customElements.define('my-custom-element', MyCustomElement);
document_types().forEach(function (entry) {
var documentName = entry.name;
var getDocument = entry.create;
promise_test(function () {
return getDocument().then(function (doc) {
var instance = document.createElement('my-custom-element');
doc.documentElement.appendChild(instance);
calls = [];
doc.documentElement.removeChild(instance);
assert_array_equals(calls, ['disconnected', instance]);
});
}, 'Removing a custom element from ' + documentName + ' must enqueue and invoke disconnectedCallback');
promise_test(function () {
return getDocument().then(function (doc) {
var instance = document.createElement('my-custom-element');
var parent = document.createElement('div');
parent.appendChild(instance);
doc.documentElement.appendChild(parent);
calls = [];
doc.documentElement.removeChild(parent);
assert_array_equals(calls, ['disconnected', instance]);
});
}, 'Removing an ancestor of custom element from ' + documentName + ' must enqueue and invoke disconnectedCallback');
promise_test(function () {
return getDocument().then(function (doc) {
var instance = document.createElement('my-custom-element');
var host = doc.createElementNS('http://www.w3.org/1999/xhtml', 'div');
var shadowRoot = host.attachShadow({mode: 'closed'});
doc.documentElement.appendChild(host);
shadowRoot.appendChild(instance);
calls = [];
shadowRoot.removeChild(instance);
assert_array_equals(calls, ['disconnected', instance]);
});
}, 'Removing a custom element from a shadow tree in ' + documentName + ' must enqueue and invoke disconnectedCallback');
promise_test(function () {
return getDocument().then(function (doc) {
var instance = document.createElement('my-custom-element');
var host = doc.createElementNS('http://www.w3.org/1999/xhtml', 'div');
var shadowRoot = host.attachShadow({mode: 'closed'});
shadowRoot.appendChild(instance);
doc.documentElement.appendChild(host);
calls = [];
doc.documentElement.removeChild(host);
assert_array_equals(calls, ['disconnected', instance]);
});
}, 'Removing the shadow host of a custom element from a' + documentName + ' must enqueue and invoke disconnectedCallback');
promise_test(function () {
return getDocument().then(function (doc) {
var instance = document.createElement('my-custom-element');
var host = doc.createElementNS('http://www.w3.org/1999/xhtml', 'div');
var shadowRoot = host.attachShadow({mode: 'closed'});
shadowRoot.appendChild(instance);
calls = [];
shadowRoot.removeChild(instance);
assert_array_equals(calls, []);
});
}, 'Removing a custom element from a detached shadow tree that belongs to ' + documentName + ' must not enqueue and invoke disconnectedCallback');
});
</script>
</body>
</html>
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