---
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>

<p>{{CompatibilityTable}}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</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>38</td>
   <td>{{CompatGeckoDesktop("13.0")}}</td>
   <td>11</td>
   <td>25</td>
   <td>7.1</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</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>{{CompatNo}}</td>
   <td>38</td>
   <td>{{CompatGeckoMobile("13.0")}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>8</td>
  </tr>
 </tbody>
</table>
</div>

<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>