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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: Array.of()
+slug: Web/JavaScript/Reference/Global_Objects/Array/of
+tags:
+ - Array
+ - Array.of()
+ - ECMAScript 2015
+ - ES 6
+ - JavaScript
+ - polyfill
+ - 方法
+translation_of: Web/JavaScript/Reference/Global_Objects/Array/of
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>Array.of()</strong></code> 方法创建一个具有可变数量参数的新数组实例,而不考虑参数的数量或类型。</p>
+
+<p> <code><strong>Array.of()</strong></code> 和 <code><strong>Array</strong></code> 构造函数之间的区别在于处理整数参数:<code><strong>Array.of(7)</strong></code><strong> </strong>创建一个具有单个元素 <strong>7</strong> 的数组,而 <strong><code>Array(7)</code> </strong>创建一个长度为7的空数组(<strong>注意:</strong>这是指一个有7个空位(empty)的数组,而不是由7个<code>undefined</code>组成的数组)。</p>
+
+<pre class="brush: js">Array.of(7); // [7]
+Array.of(1, 2, 3); // [1, 2, 3]
+
+Array(7); // [ , , , , , , ]
+Array(1, 2, 3); // [1, 2, 3]
+</pre>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox"><code>Array.of(<var>element0</var>[, <var>element1</var>[, ...[, <var>elementN</var>]]])</code></pre>
+
+<h3 id="Parameters" name="Parameters">参数</h3>
+
+<dl>
+ <dt>element<em>N</em></dt>
+ <dd>任意个参数,将按顺序成为返回数组中的元素。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>新的 {{jsxref("Array")}} 实例。</p>
+
+<h2 id="描述">描述</h2>
+
+<p>此函数是ECMAScript 2015标准的一部分。详见 <a href="https://gist.github.com/rwaldron/1074126"><code>Array.of 和</code> <code>Array.from</code> proposal</a> 和 <a href="https://gist.github.com/rwaldron/3186576"><code>Array.of</code> polyfill</a>。</p>
+
+<h2 id="示例">示例</h2>
+
+<pre class="brush: js" style="font-size: 14px;"><span style="line-height: 22px;">Array.of(1); // [1]
+</span><span style="line-height: 22px;">Array.of(1, 2, 3); // [1, 2, 3]</span>
+Array.of(undefined); // [undefined]
+</pre>
+
+<h2 id="Compatibility" name="Compatibility">兼容旧环境</h2>
+
+<p>如果原生不支持的话,在其他代码之前执行以下代码会创建 <code>Array.of()</code> 。</p>
+
+<pre class="brush: js" style="font-size: 14px;">if (!Array.of) {
+ Array.of = function() {
+ return Array.prototype.slice.call(arguments);
+ };
+}</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('ES2015', '#sec-array.of', 'Array.of')}}</td>
+ <td>{{Spec2('ES2015')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-array.of', 'Array.of')}}</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>
+
+<div>
+
+
+<p>{{Compat("javascript.builtins.Array.of")}}</p>
+</div>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Array")}}</li>
+ <li>{{jsxref("Array.from()")}}</li>
+ <li>{{jsxref("TypedArray.of()")}}</li>
+</ul>