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+---
+title: Map() 构造函数
+slug: Web/JavaScript/Reference/Global_Objects/Map/Map
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/Map
+---
+<div>{{JSRef}}</div>
+
+<p><strong><code>Map()</code> 构造函数</strong> 创建 {{jsxref("Map")}} 对象.</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">new Map([<var>iterable</var>])</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt><code><var>iterable</var></code></dt>
+ <dd>Iterable 可以是一个{{jsxref("Array", "数组")}}或者其他 <a href="/zh-CN/docs/Web/JavaScript/Guide/iterable">iterable</a> 对象，其元素为键值对(两个元素的数组，例如: [[ 1, 'one' ],[ 2, 'two' ]])。 每个键值对都会添加到新的 Map。<code>null</code> 会被当做 <code>undefined。</code></dd>
+</dl>
+
+<h2 id="示例">示例</h2>
+
+<pre class="brush: js">let myMap = new Map([
+  [1, 'one'],
+  [2, 'two'],
+  [3, 'three'],
+])
+</pre>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Specification</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map-constructor', 'Map constructor')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("javascript.builtins.Map.Map")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>{{jsxref("Set")}}</li>
+ <li>{{jsxref("WeakMap")}}</li>
+ <li>{{jsxref("WeakSet")}}</li>
+</ul>