blob: 5602ae794210f6cb39410ed2829e73875a362652 (
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
|
---
title: Set.prototype.delete()
slug: Web/JavaScript/Reference/Global_Objects/Set/delete
tags:
- ECMAScript6
- JavaScript
- set
- 方法
translation_of: Web/JavaScript/Reference/Global_Objects/Set/delete
---
<div>{{JSRef}}</div>
<p><code><strong>delete()</strong></code> 方法可以从一个 <code>Set</code> 对象中删除指定的元素。</p>
<h2 id="Syntax" name="Syntax">语法</h2>
<pre class="syntaxbox"><code><em>mySet</em>.delete(value);</code></pre>
<h3 id="参数">参数</h3>
<dl>
<dt>value</dt>
<dd>将要删除的元素</dd>
</dl>
<h3 id="返回值">返回值</h3>
<p>成功删除返回 <code>true</code>，否则返回 <code>false。</code></p>
<h2 id="Examples" name="Examples">示例</h2>
<pre class="brush: js">var mySet = new Set();
mySet.add("foo");
mySet.delete("bar"); // 返回 false，不包含 "bar" 这个元素
mySet.delete("foo"); // 返回 true，删除成功
mySet.has("foo"); // 返回 false，"foo" 已经成功删除
</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('ES6', '#sec-set.prototype.delete', 'Set.prototype.delete')}}</td>
<td>{{Spec2('ES6')}}</td>
<td>Initial definition.</td>
</tr>
<tr>
<td>{{SpecName('ESDraft', '#sec-set.prototype.delete', 'Set.prototype.delete')}}</td>
<td>{{Spec2('ESDraft')}}</td>
<td> </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>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
</tr>
<tr>
<td>Basic support</td>
<td>38</td>
<td>{{CompatGeckoDesktop("13.0")}}</td>
<td>11</td>
<td>25</td>
<td>7.1</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Chrome for Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{ CompatNo() }}</td>
<td>38</td>
<td>{{CompatGeckoMobile("13.0")}}</td>
<td>{{ CompatNo() }}</td>
<td>{{ CompatNo() }}</td>
<td>8</td>
</tr>
</tbody>
</table>
</div>
<h2 id="See_also" name="See_also">相关链接</h2>
<ul>
<li>{{jsxref("Set")}}</li>
<li>{{jsxref("Set.prototype.clear()")}}</li>
</ul>
|
