<!DOCTYPE html> <html> <head> <title>Custom Elements: connectedCallback</title> <meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org"> <meta name="assert" content="connectedCallback must be enqueued whenever custom element is inserted into 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'); calls = []; doc.documentElement.appendChild(instance); assert_array_equals(calls, ['connected', instance]); }); }, 'Inserting a custom element into ' + documentName + ' must enqueue and invoke connectedCallback'); promise_test(function () { return getDocument().then(function (doc) { var instance = document.createElement('my-custom-element'); var parent = document.createElement('div'); parent.appendChild(instance); calls = []; doc.documentElement.appendChild(parent); assert_array_equals(calls, ['connected', instance]); }); }, 'Inserting an ancestor of custom element into ' + documentName + ' must enqueue and invoke connectedCallback'); 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); calls = []; shadowRoot.appendChild(instance); assert_array_equals(calls, ['connected', instance]); }); }, 'Inserting a custom element into a shadow tree in ' + documentName + ' must enqueue and invoke connectedCallback'); 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 = []; doc.documentElement.appendChild(host); assert_array_equals(calls, ['connected', instance]); }); }, 'Inserting the shadow host of a custom element into ' + documentName + ' must enqueue and invoke connectedCallback'); 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'}); calls = []; shadowRoot.appendChild(instance); assert_array_equals(calls, []); }); }, 'Inserting a custom element into a detached shadow tree that belongs to ' + documentName + ' must not enqueue and invoke connectedCallback'); }); </script> </body> </html>