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---
title: Number.NaN
slug: Web/JavaScript/Reference/Global_Objects/Number/NaN
translation_of: Web/JavaScript/Reference/Global_Objects/Number/NaN
original_slug: Web/JavaScript/Referencia/Objectes_globals/Number/NaN
---
<div>{{JSRef("Global_Objects", "Number")}}</div>

<h2 id="Summary" name="Summary">Resum</h2>

<p>La propietat <strong><code>Number.NaN</code></strong> representa Not-A-Number (quelcom que no és un nombre). Equivalent a {{jsxref("Global_Objects/NaN", "NaN")}}.</p>

<p>No és necesari crear un objecte de tipus {{jsxref("Global_Objects/Number", "Number")}} per a accedir a aquesta propietat estàtica (utilitzeu <code>Number.NaN</code>).</p>

<div>{{js_property_attributes(0, 0, 0)}}</div>

<h2 id="Especificacions">Especificacions</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Especificació</th>
   <th scope="col">Estat</th>
   <th scope="col">Comentaris</th>
  </tr>
  <tr>
   <td>ECMAScript 1a Edició.</td>
   <td>Standard</td>
   <td>Definició inicial. Implementat a JavaScript 1.1.</td>
  </tr>
  <tr>
   <td>{{SpecName('ES5.1', '#sec-15.7.3.4', 'Number.NaN')}}</td>
   <td>{{Spec2('ES5.1')}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('ES6', '#sec-number.nan', 'Number.NaN')}}</td>
   <td>{{Spec2('ES6')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="Compatibilitat_amb_navegadors">Compatibilitat amb navegadors</h2>

<div>{{CompatibilityTable}}</div>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Característica</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Suport bàsic</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Característica</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>Suport bàsic</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="See_also" name="See_also">Vegeu també</h2>

<ul>
 <li>L'objecte global {{jsxref("Global_Objects/NaN", "NaN")}}.</li>
 <li>L'objecte {{jsxref("Global_Objects/Number", "Number")}} al qual pertany.</li>
</ul>