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51 lines
1.9 KiB
HTML
51 lines
1.9 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Custom Elements: Changes to the HTML parser</title>
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<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
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<meta name="assert" content="HTML parser must construct a custom element synchronously">
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<link rel="help" href="https://html.spec.whatwg.org/#create-an-element-for-the-token">
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<link rel="help" href="https://dom.spec.whatwg.org/#concept-create-element">
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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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<div id="log"></div>
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<script>
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var childElementCountInConstructor;
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var containerChildNodesInConstructor = [];
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var containerNextSiblingInConstructor;
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class MyCustomElement extends HTMLElement {
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constructor() {
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super();
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var container = document.getElementById('custom-element-container');
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for (var i = 0; i < container.childNodes.length; i++)
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containerChildNodesInConstructor.push(container.childNodes[i]);
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containerNextSiblingInConstructor = container.nextSibling;
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}
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};
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customElements.define('my-custom-element', MyCustomElement);
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</script>
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<div id="custom-element-container">
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<span id="custom-element-previous-element"></span>
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<my-custom-element></my-custom-element>
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<div id="custom-element-next-element"></div>
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</div>
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<script>
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test(function () {
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var instance = document.querySelector('my-custom-element');
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assert_equals(containerChildNodesInConstructor.length, 3);
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assert_equals(containerChildNodesInConstructor[0], instance.parentNode.firstChild);
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assert_equals(containerChildNodesInConstructor[1], document.getElementById('custom-element-previous-element'));
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assert_equals(containerChildNodesInConstructor[2], instance.previousSibling);
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assert_equals(containerNextSiblingInConstructor, null);
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}, 'HTML parser must only append nodes that appear before a custom element before instantiating the custom element');
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</script>
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</body>
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</html>
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