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---
title: Set.prototype.add()
slug: Web/JavaScript/Reference/Global_Objects/Set/add
translation_of: Web/JavaScript/Reference/Global_Objects/Set/add
original_slug: Web/JavaScript/Referencia/Objetos_globales/Set/add
---
<div>{{JSRef}}</div>
<p>El método <code><strong>add()</strong></code> añade un nuevo elemento con un valor específico al final del objeto <code>Set</code>.</p>
<h2 id="Sintaxis">Sintaxis</h2>
<pre class="syntaxbox"><code><em>mySet</em>.add(value);</code></pre>
<h3 id="Parameters">Parameters</h3>
<dl>
<dt>value</dt>
<dd>Requerido. El valor del elemento a ser añadido al objeto <code>Set</code>.</dd>
</dl>
<h3 id="Return_value">Return value</h3>
<p>El objeto <code>Set</code>.</p>
<h2 id="Ejemplos">Ejemplos</h2>
<h3 id="Usando_el_método_add">Usando el método add</h3>
<pre class="brush: js">var mySet = new Set();
mySet.add(1);
mySet.add(5).add("some text"); // chainable
console.log(mySet);
// Set [1, 5, "some text"]
</pre>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('ES6', '#sec-set.prototype.add', 'Set.prototype.add')}}</td>
<td>{{Spec2('ES6')}}</td>
<td>Initial definition.</td>
</tr>
<tr>
<td>{{SpecName('ESDraft', '#sec-set.prototype.add', 'Set.prototype.add')}}</td>
<td>{{Spec2('ESDraft')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
{{Compat("javascript.builtins.Set.add")}}
<h2 id="Firefox-specific_notes">Firefox-specific notes</h2>
<ul>
<li>Prior to Firefox 33 {{geckoRelease("33")}}, <code>Set.prototype.add</code> returned <code>undefined</code> and was not chainable. This has been fixed ({{bug(1031632)}}). The behavior can be found in Chrome/v8 as well (<a href="https://code.google.com/p/v8/issues/detail?id=3410">issue</a>).</li>
</ul>
<h2 id="See_also">See also</h2>
<ul>
<li>{{jsxref("Set")}}</li>
<li>{{jsxref("Set.prototype.delete()")}}</li>
<li>{{jsxref("Set.prototype.has()")}}</li>
</ul>
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