95 lines
4.9 KiB
HTML
95 lines
4.9 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 set the attributes and append the children on a custom element">
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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://html.spec.whatwg.org/multipage/parsing.html#insert-a-foreign-element">
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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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<script src="../resources/custom-elements-helpers.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 numberOfAttributesInConstructor = 0;
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var numberOfChildNodesInConstructor = 0;
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var numberOfChildNodesInAttributeChangedCallback = 0;
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var numberOfChildNodesInConnectedCallback = 0;
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var attributesChangedCalls = [];
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class MyCustomElement extends HTMLElement {
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constructor(...args) {
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super(...args);
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numberOfAttributesInConstructor = this.attributes.length;
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numberOfChildNodesInConstructor = this.childNodes.length;
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}
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attributeChangedCallback(...args) {
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attributesChangedCalls.push(create_attribute_changed_callback_log(this, ...args));
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numberOfChildNodesInAttributeChangedCallback = this.childNodes.length;
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}
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static get observedAttributes() {
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return ['id', 'class'];
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}
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connectedCallback() {
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numberOfChildNodesInConnectedCallback = this.childNodes.length;
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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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<my-custom-element id="custom-element-id" class="class1 class2">hello <b>world</b></my-custom-element>
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<script>
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var customElement = document.querySelector('my-custom-element');
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test(function () {
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assert_equals(customElement.getAttribute('id'), 'custom-element-id', 'HTML parser must preserve the id attribute');
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assert_equals(customElement.id, 'custom-element-id', 'HTML parser must preserve the semantics of reflect for the id attribute');
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assert_equals(customElement.getAttribute('class'), 'class1 class2', 'HTML parser must preserve the class attribute');
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assert_equals(customElement.classList.length, 2, 'HTML parser must initialize classList on custom elements');
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assert_equals(customElement.classList[0], 'class1', 'HTML parser must initialize classList on custom elements');
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assert_equals(customElement.classList[1], 'class2', 'HTML parser must initialize classList on custom elements');
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}, 'HTML parser must set the attributes');
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test(function () {
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assert_equals(customElement.childNodes.length, 2, 'HTML parser must append child nodes');
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assert_true(customElement.firstChild instanceof Text, 'HTML parser must append Text node child to a custom element');
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assert_equals(customElement.firstChild.data, 'hello ', 'HTML parser must append Text node child to a custom element');
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assert_true(customElement.lastChild instanceof HTMLElement, 'HTML parser must append a builtin element child to a custom element');
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assert_true(customElement.lastChild.firstChild instanceof Text, 'HTML parser must preserve grandchild nodes of a custom element');
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assert_equals(customElement.lastChild.firstChild.data, 'world', 'HTML parser must preserve grandchild nodes of a custom element');
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}, 'HTML parser must append child nodes');
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test(function () {
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assert_equals(numberOfAttributesInConstructor, 0, 'HTML parser must not set attributes on a custom element before invoking the constructor');
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assert_equals(numberOfChildNodesInConstructor, 0, 'HTML parser must not append child nodes to a custom element before invoking the constructor');
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}, 'HTML parser must set the attributes or append children before calling constructor');
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test(function () {
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// https://html.spec.whatwg.org/multipage/parsing.html#insert-a-foreign-element
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// 3.3. Pop the element queue from the custom element reactions
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// stack, and invoke custom element reactions in that queue.
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assert_equals(numberOfChildNodesInConnectedCallback, 0);
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}, 'HTML parser should call connectedCallback before appending child nodes.');
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test(function () {
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assert_equals(attributesChangedCalls.length, 2);
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assert_attribute_log_entry(attributesChangedCalls[0], {name: 'id', oldValue: null, newValue: 'custom-element-id', namespace: null});
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assert_attribute_log_entry(attributesChangedCalls[1], {name: 'class', oldValue: null, newValue: 'class1 class2', namespace: null});
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// https://html.spec.whatwg.org/multipage/parsing.html#create-an-element-for-the-token
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// 9.2. Invoke custom element reactions in queue.
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assert_equals(numberOfChildNodesInAttributeChangedCallback, 0,
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'attributeChangedCallback should be called ' +
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'before appending a child');
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}, 'HTML parser must enqueue attributeChanged reactions');
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</script>
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</body>
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</html>
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