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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: Set.prototype.entries()
+slug: Web/JavaScript/Reference/Global_Objects/Set/entries
+translation_of: Web/JavaScript/Reference/Global_Objects/Set/entries
+---
+<div>{{JSRef}}</div>
+
+<p>entries() 方法返回一个新的迭代器对象 ,这个对象的元素是类似 [value, value] 形式的数组,value 是集合对象中的每个元素,迭代器对象元素的顺序即集合对象中元素插入的顺序。由于集合对象不像 Map 对象那样拥有 key,然而,为了与 Map 对象的 API 形式保持一致,故使得每一个 entry 的 key 和 value 都拥有相同的值,因而最终返回一个 [value, value] 形式的数组。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code><em>mySet</em>.entries()</code></pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>一个新的包含 [value, value] 形式的数组迭代器对象,value 是给定集合中的每个元素,迭代器 对象元素的顺序即集合对象中元素插入的顺序。</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用_entries()">使用 <code>entries()</code></h3>
+
+<pre class="brush:js">var mySet = new Set();
+mySet.add("foobar");
+mySet.add(1);
+mySet.add("baz");
+
+var setIter = mySet.entries();
+
+console.log(setIter.next().value); // ["foobar", "foobar"]
+console.log(setIter.next().value); // [1, 1]
+console.log(setIter.next().value); // ["baz", "baz"]
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">规范</th>
+ <th scope="col">状态</th>
+ <th scope="col">说明</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-set.prototype.entries', 'Set.prototype.entries')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td>初始定义。</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-set.prototype.entries', 'Set.prototype.entries')}}</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("24") }}</td>
+ <td>{{CompatNo}}</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("24") }}</td>
+ <td>{{CompatNo}}</td>
+ <td>{{CompatNo}}</td>
+ <td>8</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Set.prototype.keys()")}}</li>
+ <li>{{jsxref("Set.prototype.values()")}}</li>
+</ul>