blob: da0040c0e3cbcffc864db20d5a87f64f51fc5287 (
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
|
---
title: WheelEvent.deltaY
slug: Web/API/WheelEvent/deltaY
translation_of: Web/API/WheelEvent/deltaY
---
<p>{{APIRef("DOM Events")}}</p>
<p> </p>
<p><code><strong>WheelEvent.deltaY</strong></code> 只读属性是一个 <code>double</code> 类型值, 声明垂直滚动量以<a href="https://developer.mozilla.org/zh-CN/docs/Web/API/WheelEvent/deltaMode" title="WheelEvent.deltaMode 只读属性返回一个 unsigned long 类型的值, 声明 delta 的滚动值的单位. 可能的值为:"><code>WheelEvent.deltaMode</code></a> 为单位.</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">var <code><em>dY</em> = <em>event</em>.deltaY;</code></pre>
<h2 id="例子">例子</h2>
<pre class="brush: js">var syntheticEvent = new WheelEvent("syntheticWheel", {"deltaY": 4, "deltaMode": 0});
console.log(syntheticEvent.deltaY);
</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-deltaY','WheelEvent.deltaY')}}</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>
{{Compat("api.WheelEvent.deltaY")}}
<h2 class="note" id="另见">另见</h2>
<ul>
<li>{{ event("wheel") }}</li>
<li>{{domxref("WheelEvent")}}</li>
</ul>
|
