From 4b1a9203c547c019fc5398082ae19a3f3d4c3efe Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:41:15 -0500
Subject: initial commit

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+---
+title: Array.prototype.keys()
+slug: Web/JavaScript/Reference/Global_Objects/Array/keys
+tags:
+  - Array
+  - ECMAScript 2015
+  - Iterator
+  - JavaScript
+  - Method
+  - Prototype
+translation_of: Web/JavaScript/Reference/Global_Objects/Array/keys
+---
+<div>{{JSRef}}</div>
+
+<p>Die <code><strong>keys()</strong></code> Methode gibt ein neues <code><strong>Array Iterator</strong></code> Objekt zurück, welches den Schlüssel für jeden Index des Arrays enthält.</p>
+
+<div>{{EmbedInteractiveExample("pages/js/array-keys.html")}}</div>
+
+
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox notranslate"><var>arr</var>.keys()</pre>
+
+<h3 id="Rückgabewert">Rückgabewert</h3>
+
+<p>Ein neues {{jsxref("Array")}} iterator-Objekt.</p>
+
+<h2 id="Beispiele">Beispiele</h2>
+
+<h3 id="Der_Key_Iterator_ignoriert_keine_Lücken">Der Key Iterator ignoriert keine Lücken</h3>
+
+<pre class="brush: js notranslate">var arr = ['a', , 'c'];
+var sparseKeys = Object.keys(arr);
+var denseKeys = [...arr.keys()];
+console.log(sparseKeys); // ['0', '2']
+console.log(denseKeys);  // [0, 1, 2]
+</pre>
+
+<h2 id="Spezifikationen">Spezifikationen</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Spezifikation</th>
+   <th scope="col">Status</th>
+   <th scope="col">Kommentar</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES2015', '#sec-array.prototype.keys', 'Array.prototype.keys')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initiale Definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-array.prototype.keys', 'Array.prototype.keys')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browserkompatibilität">Browserkompatibilität</h2>
+
+<div>
+
+
+<p>{{Compat("javascript.builtins.Array.keys")}}</p>
+</div>
+
+<h2 id="Siehe_auch">Siehe auch</h2>
+
+<ul>
+ <li>{{jsxref("Array.prototype.values()")}}</li>
+ <li>{{jsxref("Array.prototype.entries()")}}</li>
+ <li><a href="/de/docs/Web/JavaScript/Reference/Iteration_protocols">Iteration protocols</a></li>
+</ul>
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