-
Notifications
You must be signed in to change notification settings - Fork 54
/
attribute-changed-callback.html
271 lines (228 loc) · 13.2 KB
/
attribute-changed-callback.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
<!DOCTYPE html>
<html>
<head>
<title>Custom Elements: attributeChangedCallback</title>
<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
<meta name="assert" content="attributeChangedCallback must be enqueued whenever custom element's attribute is added, changed or removed">
<link rel="help" href="https://w3c.github.io/webcomponents/spec/custom/#dfn-attribute-changed-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>
<parser-created-element title></parser-created-element>
<script>
var customElement = define_new_custom_element(['title', 'id', 'r']);
test(function () {
const instance = document.createElement(customElement.name);
assert_array_equals(customElement.takeLog().types(), ['constructed']);
instance.setAttribute('title', 'foo');
assert_equals(instance.getAttribute('title'), 'foo');
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: null, newValue: 'foo', namespace: null});
instance.removeAttribute('title');
assert_equals(instance.getAttribute('title'), null);
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: 'foo', newValue: null, namespace: null});
}, 'setAttribute and removeAttribute must enqueue and invoke attributeChangedCallback');
test(function () {
var instance = document.createElement(customElement.name);
assert_array_equals(customElement.takeLog().types(), ['constructed']);
instance.setAttributeNS('http://www.w3.org/2000/svg', 'title', 'hello');
assert_equals(instance.getAttribute('title'), 'hello');
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: null, newValue: 'hello', namespace: 'http://www.w3.org/2000/svg'});
instance.removeAttributeNS('http://www.w3.org/2000/svg', 'title');
assert_equals(instance.getAttribute('title'), null);
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: 'hello', newValue: null, namespace: 'http://www.w3.org/2000/svg'});
}, 'setAttributeNS and removeAttributeNS must enqueue and invoke attributeChangedCallback');
test(function () {
var instance = document.createElement(customElement.name);
assert_array_equals(customElement.takeLog().types(), ['constructed']);
var attr = document.createAttribute('id');
attr.value = 'bar';
instance.setAttributeNode(attr);
assert_equals(instance.getAttribute('id'), 'bar');
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'id', oldValue: null, newValue: 'bar', namespace: null});
instance.removeAttributeNode(attr);
assert_equals(instance.getAttribute('id'), null);
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'id', oldValue: 'bar', newValue: null, namespace: null});
}, 'setAttributeNode and removeAttributeNode must enqueue and invoke attributeChangedCallback for an HTML attribute');
test(function () {
const instance = document.createElement(customElement.name);
assert_array_equals(customElement.takeLog().types(), ['constructed']);
const attr = document.createAttributeNS('http://www.w3.org/2000/svg', 'r');
attr.value = '100';
instance.setAttributeNode(attr);
assert_equals(instance.getAttribute('r'), '100');
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'r', oldValue: null, newValue: '100', namespace: 'http://www.w3.org/2000/svg'});
instance.removeAttributeNode(attr);
assert_equals(instance.getAttribute('r'), null);
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'r', oldValue: '100', newValue: null, namespace: 'http://www.w3.org/2000/svg'});
}, 'setAttributeNode and removeAttributeNS must enqueue and invoke attributeChangedCallback for an SVG attribute');
test(function () {
const instance = document.createElement(customElement.name);
assert_array_equals(customElement.takeLog().types(), ['constructed']);
instance.toggleAttribute('title', true);
assert_equals(instance.hasAttribute('title'), true);
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: null, newValue: '', namespace: null});
instance.toggleAttribute('title');
assert_equals(instance.hasAttribute('title'), false);
var logEntries = customElement.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'title', oldValue: '', newValue: null, namespace: null});
}, 'toggleAttribute must enqueue and invoke attributeChangedCallback');
test(function () {
const callsToOld = [];
const callsToNew = [];
class CustomElement extends HTMLElement { }
CustomElement.prototype.attributeChangedCallback = function (...args) {
callsToOld.push(create_attribute_changed_callback_log(this, ...args));
}
CustomElement.observedAttributes = ['title'];
customElements.define('element-with-mutated-attribute-changed-callback', CustomElement);
CustomElement.prototype.attributeChangedCallback = function (...args) {
callsToNew.push(create_attribute_changed_callback_log(this, ...args));
}
const instance = document.createElement('element-with-mutated-attribute-changed-callback');
instance.setAttribute('title', 'hi');
assert_equals(instance.getAttribute('title'), 'hi');
assert_array_equals(callsToNew, []);
assert_equals(callsToOld.length, 1);
assert_attribute_log_entry(callsToOld[0], {name: 'title', oldValue: null, newValue: 'hi', namespace: null});
}, 'Mutating attributeChangedCallback after calling customElements.define must not affect the callback being invoked');
test(function () {
const calls = [];
class CustomElement extends HTMLElement {
attributeChangedCallback(...args) {
calls.push(create_attribute_changed_callback_log(this, ...args));
}
}
CustomElement.observedAttributes = ['title'];
customElements.define('element-not-observing-id-attribute', CustomElement);
const instance = document.createElement('element-not-observing-id-attribute');
assert_equals(calls.length, 0);
instance.setAttribute('title', 'hi');
assert_equals(calls.length, 1);
assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: 'hi', namespace: null});
instance.setAttribute('id', 'some');
assert_equals(calls.length, 1);
assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: 'hi', namespace: null});
}, 'attributedChangedCallback must not be invoked when the observed attributes does not contain the attribute');
test(function () {
const calls = [];
class CustomElement extends HTMLElement { }
CustomElement.prototype.attributeChangedCallback = function (...args) {
calls.push(create_attribute_changed_callback_log(this, ...args));
}
CustomElement.observedAttributes = ['title', 'lang'];
customElements.define('element-with-mutated-observed-attributes', CustomElement);
CustomElement.observedAttributes = ['title', 'id'];
const instance = document.createElement('element-with-mutated-observed-attributes');
instance.setAttribute('title', 'hi');
assert_equals(calls.length, 1);
assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: 'hi', namespace: null});
instance.setAttribute('id', 'some');
assert_equals(calls.length, 1);
instance.setAttribute('lang', 'en');
assert_equals(calls.length, 2);
assert_attribute_log_entry(calls[1], {name: 'lang', oldValue: null, newValue: 'en', namespace: null});
}, 'Mutating observedAttributes after calling customElements.define must not affect the set of attributes for which attributedChangedCallback is invoked');
test(function () {
var calls = [];
class CustomElement extends HTMLElement { }
CustomElement.prototype.attributeChangedCallback = function (...args) {
calls.push(create_attribute_changed_callback_log(this, ...args));
}
CustomElement.observedAttributes = { [Symbol.iterator]: function *() { yield 'lang'; yield 'style'; } };
customElements.define('element-with-generator-observed-attributes', CustomElement);
var instance = document.createElement('element-with-generator-observed-attributes');
instance.setAttribute('lang', 'en');
assert_equals(calls.length, 1);
assert_attribute_log_entry(calls[0], {name: 'lang', oldValue: null, newValue: 'en', namespace: null});
instance.setAttribute('lang', 'ja');
assert_equals(calls.length, 2);
assert_attribute_log_entry(calls[1], {name: 'lang', oldValue: 'en', newValue: 'ja', namespace: null});
instance.setAttribute('title', 'hello');
assert_equals(calls.length, 2);
instance.setAttribute('style', 'font-size: 2rem');
assert_equals(calls.length, 3);
assert_attribute_log_entry(calls[2], {name: 'style', oldValue: null, newValue: 'font-size: 2rem', namespace: null});
}, 'attributedChangedCallback must be enqueued for attributes specified in a non-Array iterable observedAttributes');
test(function () {
var calls = [];
class CustomElement extends HTMLElement { }
CustomElement.prototype.attributeChangedCallback = function (...args) {
calls.push(create_attribute_changed_callback_log(this, ...args));
}
CustomElement.observedAttributes = ['style'];
customElements.define('element-with-style-attribute-observation', CustomElement);
var instance = document.createElement('element-with-style-attribute-observation');
assert_equals(calls.length, 0);
instance.style.fontSize = '10px';
assert_equals(calls.length, 1);
assert_attribute_log_entry(calls[0], {name: 'style', oldValue: null, newValue: 'font-size: 10px;', namespace: null});
instance.style.fontSize = '20px';
assert_equals(calls.length, 2);
assert_attribute_log_entry(calls[1], {name: 'style', oldValue: 'font-size: 10px;', newValue: 'font-size: 20px;', namespace: null});
}, 'attributedChangedCallback must be enqueued for style attribute change by mutating inline style declaration');
test(function () {
var calls = [];
class CustomElement extends HTMLElement { }
CustomElement.prototype.attributeChangedCallback = function (...args) {
calls.push(create_attribute_changed_callback_log(this, ...args));
}
CustomElement.observedAttributes = ['title'];
customElements.define('element-with-no-style-attribute-observation', CustomElement);
var instance = document.createElement('element-with-no-style-attribute-observation');
assert_equals(calls.length, 0);
instance.style.fontSize = '10px';
assert_equals(calls.length, 0);
instance.title = 'hello';
assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: 'hello', namespace: null});
}, 'attributedChangedCallback must not be enqueued when mutating inline style declaration if the style attribute is not observed');
test(function () {
var calls = [];
class CustomElement extends HTMLElement { }
CustomElement.prototype.attributeChangedCallback = function (...args) {
calls.push(create_attribute_changed_callback_log(this, ...args));
}
CustomElement.observedAttributes = ['title'];
customElements.define('parser-created-element', CustomElement);
assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: '', namespace: null});
}, 'Upgrading a parser created element must enqueue and invoke attributeChangedCallback for an HTML attribute');
test(function () {
var calls = [];
class CustomElement extends HTMLElement { }
CustomElement.prototype.attributeChangedCallback = function (...args) {
calls.push(create_attribute_changed_callback_log(this, ...args));
}
CustomElement.observedAttributes = ['title'];
customElements.define('cloned-element-with-attribute', CustomElement);
var instance = document.createElement('cloned-element-with-attribute');
assert_equals(calls.length, 0);
instance.title = '';
assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: '', namespace: null});
calls = [];
var clone = instance.cloneNode(false);
assert_attribute_log_entry(calls[0], {name: 'title', oldValue: null, newValue: '', namespace: null});
}, 'Upgrading a cloned element must enqueue and invoke attributeChangedCallback for an HTML attribute');
</script>
</body>
</html>