---
title: Array.prototype.entries()
slug: Web/JavaScript/Reference/Global_Objects/Array/entries
tags:
  - Array
  - ECMAScript6
  - Iterator
  - JavaScript
  - Method
  - Prototype
  - 迭代器
  - 陣列
translation_of: Web/JavaScript/Reference/Global_Objects/Array/entries
---
<div>{{JSRef}}</div>

<p><code><strong>entries()</strong></code> 方法會回傳一個包含陣列中每一個索引之鍵值對（key/value pairs）的新陣列迭代器（<code><strong>Array Iterator</strong></code>）物件。</p>

<div>{{EmbedInteractiveExample("pages/js/array-entries.html")}}</div>



<h2 id="語法">語法</h2>

<pre class="syntaxbox"><var>a</var>.entries()</pre>

<h3 id="回傳值">回傳值</h3>

<p>一個新的 {{jsxref("Array")}} 迭代器物件。</p>

<h2 id="範例">範例</h2>

<h3 id="使用_for…of_進行迭代">使用 <a href="/zh-TW/docs/Web/JavaScript/Reference/Statements/for...of">for…of</a> 進行迭代</h3>

<pre class="brush:js">var a = ['a', 'b', 'c'];
var iterator = a.entries();

for (let e of iterator) {
  console.log(e);
}
// [0, 'a']
// [1, 'b']
// [2, 'c']
</pre>

<h2 id="規範">規範</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">規格</th>
   <th scope="col">狀態</th>
   <th scope="col">備註</th>
  </tr>
  <tr>
   <td>{{SpecName('ES2015', '#sec-array.prototype.entries', 'Array.prototype.entries')}}</td>
   <td>{{Spec2('ES2015')}}</td>
   <td>首次定義。</td>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-array.prototype.entries', 'Array.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>

<div>


<p>{{Compat("javascript.builtins.Array.entries")}}</p>
</div>

<h2 id="參見">參見</h2>

<ul>
 <li>{{jsxref("Array.prototype.keys()")}}</li>
 <li>{{jsxref("Array.prototype.values()")}}</li>
 <li>{{jsxref("Array.prototype.forEach()")}}</li>
 <li>{{jsxref("Array.prototype.every()")}}</li>
 <li>{{jsxref("Array.prototype.some()")}}</li>
 <li><a href="/zh-TW/docs/Web/JavaScript/Reference/Statements/for...of">for...of</a></li>
 <li><a href="/zh-TW/docs/Web/JavaScript/Reference/Iteration_protocols">迭代協議</a></li>
</ul>