blob: 7db3c83a712985b31fda1e466e9ad290ce0d33e4 (
plain)
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
|
---
title: WheelEvent.deltaMode
slug: Web/API/WheelEvent/deltaMode
translation_of: Web/API/WheelEvent/deltaMode
---
<p>{{APIRef("DOM Events")}}</p>
<p><code><strong>WheelEvent.deltaMode</strong></code> 只读属性返回一个 <code>unsigned long</code> 类型的值, 声明 delta 的滚动值的单位. 可能的值为:</p>
<table class="standard-table">
<tbody>
<tr>
<td class="header">Constant</td>
<td class="header">Value</td>
<td class="header">Description</td>
</tr>
<tr>
<td><code>DOM_DELTA_PIXEL</code></td>
<td><code>0x00</code></td>
<td>delta 的值为 像素 级别.</td>
</tr>
<tr>
<td><code>DOM_DELTA_LINE</code></td>
<td><code>0x01</code></td>
<td>delta 的值为 行 级别.</td>
</tr>
<tr>
<td><code>DOM_DELTA_PAGE</code></td>
<td><code>0x02</code></td>
<td>delta 的值为 页 级别.</td>
</tr>
</tbody>
</table>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">var <code><em>unit</em> = <em>event</em>.deltaMode;</code></pre>
<h2 id="例子">例子</h2>
<pre class="brush: js">var syntheticEvent = new WheelEvent("syntheticWheel", {"deltaX": 4, "deltaMode": 0});
console.log(syntheticEvent.deltaMode);
</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('DOM3 Events','#widl-WheelEvent-deltaMode','WheelEvent.deltaMode')}}</td>
<td>{{Spec2('DOM3 Events')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p>{{ CompatibilityTable() }}</p>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Edge</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari (WebKit)</th>
</tr>
<tr>
<td>Basic support</td>
<td>31</td>
<td>{{ CompatVersionUnknown }}</td>
<td>{{ CompatGeckoDesktop("17.0") }}</td>
<td>{{ CompatIE("9.0") }}</td>
<td>18</td>
<td>7.0</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Edge</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Phone</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{ CompatVersionUnknown() }}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{ CompatGeckoMobile("17.0") }}</td>
<td>{{ CompatUnknown() }}</td>
<td>{{ CompatVersionUnknown() }}</td>
<td>{{ CompatNo() }}</td>
</tr>
</tbody>
</table>
</div>
<h2 class="note" id="另见">另见</h2>
<ul>
<li>{{ event("wheel") }}</li>
<li>{{domxref("WheelEvent")}}</li>
</ul>
|
