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223 lines
11 KiB
HTML
223 lines
11 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Custom Elements: attributeChangedCallback</title>
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<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
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<meta name="assert" content="attributeChangedCallback must be enqueued whenever custom element's attribute is added, changed or removed">
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<link rel="help" href="https://w3c.github.io/webcomponents/spec/custom/#dfn-attribute-changed-callback">
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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 customElement = define_new_custom_element(['title', 'id', 'r']);
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test(function () {
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const instance = document.createElement(customElement.name);
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assert_array_equals(customElement.takeLog().types(), ['constructed']);
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instance.setAttribute('title', 'foo');
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assert_equals(instance.getAttribute('title'), 'foo');
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var logEntries = customElement.takeLog();
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assert_array_equals(logEntries.types(), ['attributeChanged']);
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assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: null, newValue: 'foo', namespace: null});
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instance.removeAttribute('title');
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assert_equals(instance.getAttribute('title'), null);
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var logEntries = customElement.takeLog();
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assert_array_equals(logEntries.types(), ['attributeChanged']);
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assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: 'foo', newValue: null, namespace: null});
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}, 'setAttribute and removeAttribute must enqueue and invoke attributeChangedCallback');
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test(function () {
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var instance = document.createElement(customElement.name);
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assert_array_equals(customElement.takeLog().types(), ['constructed']);
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instance.setAttributeNS('http://www.w3.org/2000/svg', 'title', 'hello');
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assert_equals(instance.getAttribute('title'), 'hello');
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var logEntries = customElement.takeLog();
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assert_array_equals(logEntries.types(), ['attributeChanged']);
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assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: null, newValue: 'hello', namespace: 'http://www.w3.org/2000/svg'});
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instance.removeAttributeNS('http://www.w3.org/2000/svg', 'title');
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assert_equals(instance.getAttribute('title'), null);
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var logEntries = customElement.takeLog();
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assert_array_equals(logEntries.types(), ['attributeChanged']);
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assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: 'hello', newValue: null, namespace: 'http://www.w3.org/2000/svg'});
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}, 'setAttributeNS and removeAttributeNS must enqueue and invoke attributeChangedCallback');
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test(function () {
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var instance = document.createElement(customElement.name);
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assert_array_equals(customElement.takeLog().types(), ['constructed']);
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var attr = document.createAttribute('id');
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attr.value = 'bar';
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instance.setAttributeNode(attr);
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assert_equals(instance.getAttribute('id'), 'bar');
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var logEntries = customElement.takeLog();
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assert_array_equals(logEntries.types(), ['attributeChanged']);
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assert_attribute_log_entry(logEntries.last(), {name: 'id', oldValue: null, newValue: 'bar', namespace: null});
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instance.removeAttributeNode(attr);
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assert_equals(instance.getAttribute('id'), null);
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var logEntries = customElement.takeLog();
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assert_array_equals(logEntries.types(), ['attributeChanged']);
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assert_attribute_log_entry(logEntries.last(), {name: 'id', oldValue: 'bar', newValue: null, namespace: null});
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}, 'setAttributeNode and removeAttributeNode must enqueue and invoke attributeChangedCallback for an HTML attribute');
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test(function () {
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const instance = document.createElement(customElement.name);
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assert_array_equals(customElement.takeLog().types(), ['constructed']);
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const attr = document.createAttributeNS('http://www.w3.org/2000/svg', 'r');
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attr.value = '100';
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instance.setAttributeNode(attr);
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assert_equals(instance.getAttribute('r'), '100');
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var logEntries = customElement.takeLog();
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assert_array_equals(logEntries.types(), ['attributeChanged']);
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assert_attribute_log_entry(logEntries.last(), {name: 'r', oldValue: null, newValue: '100', namespace: 'http://www.w3.org/2000/svg'});
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instance.removeAttributeNode(attr);
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assert_equals(instance.getAttribute('r'), null);
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var logEntries = customElement.takeLog();
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assert_array_equals(logEntries.types(), ['attributeChanged']);
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assert_attribute_log_entry(logEntries.last(), {name: 'r', oldValue: '100', newValue: null, namespace: 'http://www.w3.org/2000/svg'});
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}, 'setAttributeNode and removeAttributeNS must enqueue and invoke attributeChangedCallback for an SVG attribute');
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test(function () {
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const callsToOld = [];
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const callsToNew = [];
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class CustomElement extends HTMLElement { }
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CustomElement.prototype.attributeChangedCallback = function (...args) {
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callsToOld.push(create_attribute_changed_callback_log(this, ...args));
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}
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CustomElement.observedAttributes = ['title'];
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customElements.define('element-with-mutated-attribute-changed-callback', CustomElement);
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CustomElement.prototype.attributeChangedCallback = function (...args) {
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callsToNew.push(create_attribute_changed_callback_log(this, ...args));
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}
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const instance = document.createElement('element-with-mutated-attribute-changed-callback');
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instance.setAttribute('title', 'hi');
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assert_equals(instance.getAttribute('title'), 'hi');
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assert_array_equals(callsToNew, []);
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assert_equals(callsToOld.length, 1);
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assert_attribute_log_entry(callsToOld[0], {name: 'title', oldValue: null, newValue: 'hi', namespace: null});
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}, 'Mutating attributeChangedCallback after calling customElements.define must not affect the callback being invoked');
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test(function () {
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const calls = [];
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class CustomElement extends HTMLElement {
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attributeChangedCallback(...args) {
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calls.push(create_attribute_changed_callback_log(this, ...args));
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}
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}
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CustomElement.observedAttributes = ['title'];
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customElements.define('element-not-observing-id-attribute', CustomElement);
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const instance = document.createElement('element-not-observing-id-attribute');
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assert_equals(calls.length, 0);
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instance.setAttribute('title', 'hi');
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assert_equals(calls.length, 1);
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assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: 'hi', namespace: null});
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instance.setAttribute('id', 'some');
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assert_equals(calls.length, 1);
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assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: 'hi', namespace: null});
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}, 'attributedChangedCallback must not be invoked when the observed attributes does not contain the attribute');
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test(function () {
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const calls = [];
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class CustomElement extends HTMLElement { }
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CustomElement.prototype.attributeChangedCallback = function (...args) {
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calls.push(create_attribute_changed_callback_log(this, ...args));
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}
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CustomElement.observedAttributes = ['title', 'lang'];
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customElements.define('element-with-mutated-observed-attributes', CustomElement);
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CustomElement.observedAttributes = ['title', 'id'];
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const instance = document.createElement('element-with-mutated-observed-attributes');
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instance.setAttribute('title', 'hi');
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assert_equals(calls.length, 1);
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assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: 'hi', namespace: null});
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instance.setAttribute('id', 'some');
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assert_equals(calls.length, 1);
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instance.setAttribute('lang', 'en');
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assert_equals(calls.length, 2);
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assert_attribute_log_entry(calls[1], {name: 'lang', oldValue: null, newValue: 'en', namespace: null});
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}, 'Mutating observedAttributes after calling customElements.define must not affect the set of attributes for which attributedChangedCallback is invoked');
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test(function () {
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var calls = [];
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class CustomElement extends HTMLElement { }
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CustomElement.prototype.attributeChangedCallback = function (...args) {
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calls.push(create_attribute_changed_callback_log(this, ...args));
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}
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CustomElement.observedAttributes = { [Symbol.iterator]: function *() { yield 'lang'; yield 'style'; } };
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customElements.define('element-with-generator-observed-attributes', CustomElement);
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var instance = document.createElement('element-with-generator-observed-attributes');
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instance.setAttribute('lang', 'en');
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assert_equals(calls.length, 1);
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assert_attribute_log_entry(calls[0], {name: 'lang', oldValue: null, newValue: 'en', namespace: null});
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instance.setAttribute('lang', 'ja');
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assert_equals(calls.length, 2);
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assert_attribute_log_entry(calls[1], {name: 'lang', oldValue: 'en', newValue: 'ja', namespace: null});
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instance.setAttribute('title', 'hello');
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assert_equals(calls.length, 2);
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instance.setAttribute('style', 'font-size: 2rem');
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assert_equals(calls.length, 3);
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assert_attribute_log_entry(calls[2], {name: 'style', oldValue: null, newValue: 'font-size: 2rem', namespace: null});
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}, 'attributedChangedCallback must be enqueued for attributes specified in a non-Array iterable observedAttributes');
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test(function () {
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var calls = [];
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class CustomElement extends HTMLElement { }
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CustomElement.prototype.attributeChangedCallback = function (...args) {
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calls.push(create_attribute_changed_callback_log(this, ...args));
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}
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CustomElement.observedAttributes = ['style'];
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customElements.define('element-with-style-attribute-observation', CustomElement);
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var instance = document.createElement('element-with-style-attribute-observation');
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assert_equals(calls.length, 0);
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instance.style.fontSize = '10px';
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assert_equals(calls.length, 1);
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assert_attribute_log_entry(calls[0], {name: 'style', oldValue: null, newValue: 'font-size: 10px;', namespace: null});
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instance.style.fontSize = '20px';
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assert_equals(calls.length, 2);
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assert_attribute_log_entry(calls[1], {name: 'style', oldValue: 'font-size: 10px;', newValue: 'font-size: 20px;', namespace: null});
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}, 'attributedChangedCallback must be enqueued for style attribute change by mutating inline style declaration');
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test(function () {
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var calls = [];
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class CustomElement extends HTMLElement { }
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CustomElement.prototype.attributeChangedCallback = function (...args) {
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calls.push(create_attribute_changed_callback_log(this, ...args));
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}
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CustomElement.observedAttributes = ['title'];
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customElements.define('element-with-no-style-attribute-observation', CustomElement);
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var instance = document.createElement('element-with-no-style-attribute-observation');
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assert_equals(calls.length, 0);
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instance.style.fontSize = '10px';
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assert_equals(calls.length, 0);
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instance.title = 'hello';
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assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: 'hello', namespace: null});
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}, 'attributedChangedCallback must not be enqueued when mutating inline style declaration if the style attribute is not observed');
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</script>
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</body>
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</html>
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