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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:43:23 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:43:23 -0500
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+---
+title: Set.prototype.entries()
+slug: Web/JavaScript/Reference/Global_Objects/Set/entries
+tags:
+ - ECMAScript 2015
+ - JavaScript
+ - 原型
+ - 方法
+ - 迭代器
+ - 集合
+translation_of: Web/JavaScript/Reference/Global_Objects/Set/entries
+---
+<div>{{JSRef}}</div>
+
+<div><code><strong>entries()</strong></code> 方法回傳一個 <code>Iterator</code> 物件,其包含著一個由插入順序排序,<code>Set</code> 物件中每個元素的<strong> <code>[value, value]</code></strong> 陣列。儘管對 <code>Set</code> 物件來說沒有像 <code>Map</code> 一樣的 <code>key</code> 概念,為了確保這個 API 運作的與 <code>Map</code> 相似,每個 <em>entry</em> 都有同樣的值同時作為其 <em>key</em> 和 <em>value</em> ,因此回傳的是一個<strong><code>[value, value]</code></strong> 的陣列。</div>
+
+<div>{{EmbedInteractiveExample("pages/js/set-prototype-entries.html")}}</div>
+
+
+
+<h2 id="語法">語法</h2>
+
+<pre class="syntaxbox"><code><em>mySet</em>.entries()</code></pre>
+
+<h3 id="回傳值">回傳值</h3>
+
+<p>一個新的 <code>Iterator</code> 物件,包含著一個由插入順序排序,<code>Set</code> 物件中每個元素的<strong> <code>[value, value]</code></strong> 陣列。</p>
+
+<h2 id="範例">範例</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="規範">規範</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">規範</th>
+ <th scope="col">狀態</th>
+ <th scope="col">註</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES2015', '#sec-set.prototype.entries', 'Set.prototype.entries')}}</td>
+ <td>{{Spec2('ES2015')}}</td>
+ <td>Initial definition.</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="瀏覽器相容性">瀏覽器相容性</h2>
+
+
+
+<p>{{Compat("javascript.builtins.Set.entries")}}</p>
+
+<h2 id="另見">另見</h2>
+
+<ul>
+ <li>{{jsxref("Set.prototype.keys()")}}</li>
+ <li>{{jsxref("Set.prototype.values()")}}</li>
+</ul>