blob: 49ad66f5aa127c490a782b5e55f5623c6d0c4dbd (
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
|
---
title: Event.defaultPrevented
slug: Web/API/Event/defaultPrevented
translation_of: Web/API/Event/defaultPrevented
---
<div>{{ APIRef("DOM") }}</div>
<h2 id="概述">概述</h2>
<p>回傳一個布林值，表示事件的預設行為是否被取消，也就是事件物件是否曾執行 {{domxref("event.preventDefault()", "preventDefault()")}} 方法。</p>
<div class="note"><strong>註：</strong>You should use this instead of the non-standard, deprecated<code> getPreventDefault()</code> method (see {{ bug(691151) }}).</div>
<h2 id="語法">語法</h2>
<pre class="eval">bool = event.defaultPrevented </pre>
<h2 id="範例">範例</h2>
<pre> if (e.defaultPrevented) {
/* the default was prevented */
}
</pre>
<h2 id="規範">規範</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName('DOM WHATWG', '#dom-event-defaultprevented', 'Event.defaultPrevented()')}}</td>
<td>{{ Spec2('DOM WHATWG') }}</td>
<td> </td>
</tr>
<tr>
<td>{{SpecName('DOM4', '#dom-event-defaultprevented', 'Event.defaultPrevented')}}</td>
<td>{{Spec2('DOM4')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="瀏覽器相容性"><span style="font-size: 1.71428571428571rem; letter-spacing: -0.021em; line-height: 1;">瀏覽器相容性</span></h2>
{{Compat("api.Event.defaultPrevented")}}
|
