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---
title: Function.arity
slug: Web/JavaScript/Reference/Global_Objects/Function/arity
translation_of: Archive/Web/JavaScript/Function.arity
---
<p>{{JSRef}}{{Obsolete_Header}}</p>

<div class="blockIndicator note">
<p>La proprieta' <code><strong>arity</strong></code> ritornava il numero di parametri richiesta da una funzione. Ad ogni modo non esiste piu' ed e' stata rimpiazzata dalla proprieta' {{JSxRef("Function.prototype.length")}}.</p>
</div>

<h2 id="Specifiche">Specifiche</h2>

<p>Implementato in JavaScript 1.2. Deprecato in JavaScript 1.4.</p>

<h2 id="Compatibilita_Browser">Compatibilita' Browser</h2>



<p>{{Compat("javascript.builtins.Function.arity")}}</p>

<h2 id="Guarda_anche">Guarda anche</h2>

<ul>
 <li>{{JSxRef("Function.prototype.length")}}</li>
</ul>