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---
title: Array.isArray()
slug: Web/JavaScript/Reference/Global_Objects/Array/isArray
translation_of: Web/JavaScript/Reference/Global_Objects/Array/isArray
---
<div>{{JSRef}}</div>
<p>De <code><strong>Array.isArray()</strong></code> bepaalt of de gegeven waarde een {{jsxref("Array")}} is. </p>
<h2 id="Syntax">Syntax</h2>
<pre class="syntaxbox"><code>Array.isArray(<var>obj</var>)</code></pre>
<h3 id="Parameters">Parameters</h3>
<dl>
<dt><code>obj</code></dt>
<dd>Het te onderzoeken object.</dd>
</dl>
<h2 id="Beschrijving">Beschrijving</h2>
<p>Indien het object een {{jsxref("Array")}} is, dan is <code>true</code> het resultaat, anders wordt dit <code>false</code>. </p>
<p>Bekijk het artikel <a href="http://web.mit.edu/jwalden/www/isArray.html">“Determining with absolute accuracy whether or not a JavaScript object is an array”</a> voor nadere details.</p>
<h2 id="Voorbeelden">Voorbeelden</h2>
<pre class="brush: js">// alle van de volgende call resulteren in true
Array.isArray([]);
Array.isArray([1]);
Array.isArray(new Array());
// Weinig bekend: Array.prototype is zelf een array:
Array.isArray(Array.prototype);
// alle van de volgende calls resulteren in false
Array.isArray();
Array.isArray({});
Array.isArray(null);
Array.isArray(undefined);
Array.isArray(17);
Array.isArray('Array');
Array.isArray(true);
Array.isArray(false);
Array.isArray({ __proto__: Array.prototype });
</pre>
<h2 id="Polyfill">Polyfill</h2>
<p>De volgende code zal de methode <code>Array.isArray()</code> aanmaken indien deze niet van huis uit werd meegegeven:</p>
<pre class="brush: js">if (!Array.isArray) {
Array.isArray = function(arg) {
return Object.prototype.toString.call(arg) === '[object Array]';
};
}
</pre>
<h2 id="Specificaties">Specificaties</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specificaties</th>
<th scope="col">Status</th>
<th scope="col">Commentaar</th>
</tr>
<tr>
<td>{{SpecName('ES5.1', '#sec-15.4.3.2', 'Array.isArray')}}</td>
<td>{{Spec2('ES5.1')}}</td>
<td>Initiele definitie. Geimplementeerd in JavaScript 1.8.5.</td>
</tr>
<tr>
<td>{{SpecName('ES6', '#sec-array.isarray', 'Array.isArray')}}</td>
<td>{{Spec2('ES6')}}</td>
<td> </td>
</tr>
<tr>
<td>{{SpecName('ESDraft', '#sec-array.isarray', 'Array.isArray')}}</td>
<td>{{Spec2('ESDraft')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibiliteit">Browser compatibiliteit</h2>
<div>{{CompatibilityTable}}</div>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Eigenschap</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>{{CompatChrome("5")}}</td>
<td>{{CompatGeckoDesktop("2.0")}}</td>
<td>{{CompatIE("9")}}</td>
<td>{{CompatOpera("10.5")}}</td>
<td>{{CompatSafari("5")}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Eigenschap</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>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatGeckoMobile("2.0")}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<h2 id="Zie_ook">Zie ook</h2>
<ul>
<li>{{jsxref("Array")}}</li>
</ul>
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