---
title: String.prototype.sub()
slug: Web/JavaScript/Reference/Global_Objects/String/sub
tags:
  - Descontinuado
  - JavaScript
  - Prototipo
  - String
  - metodo
  - sub()
translation_of: Web/JavaScript/Reference/Global_Objects/String/sub
---
<div>{{JSRef}} {{deprecated_header}}</div>

<p>O método <code>sub()</code> cria um elemento HTML <code><a href="https://wiki.developer.mozilla.org/en-US/docs/Web/HTML/Element/sub" title="https://wiki.developer.mozilla.org/en-US/docs/Web/HTML/Element/sub">&lt;sub&gt;</a></code> que faz com que uma string seja exibida como subscrito (texto pequeno).</p>

<h2 id="Sintaxe">Sintaxe</h2>

<pre class="syntaxbox notranslate"><code><var>str</var>.sub()</code></pre>

<h3 id="Valor_retornado">Valor retornado</h3>

<p>Uma string contendo um elemento HTML <code><a href="https://wiki.developer.mozilla.org/en-US/docs/Web/HTML/Element/sub" title="https://wiki.developer.mozilla.org/en-US/docs/Web/HTML/Element/sub">&lt;sub&gt;</a></code>.</p>

<h2 id="Descrição">Descrição</h2>

<p>O método <code>sub()</code> cria uma string dentro de uma tag <code>&lt;sub&gt;</code>: <code>"&lt;sub&gt;str&lt;/sub&gt;"</code>.</p>

<h2 id="Exemplos">Exemplos</h2>

<h3 id="Usando_os_métodos_sub_e_sup">Usando os métodos <code>sub()</code> e <code>sup()</code></h3>

<p>Os exemplos seguintes usam o métodos <code>sub()</code> e {{jsxref("String.prototype.sup()", "sup()")}} para formatar uma string:</p>

<pre class="brush: js notranslate">var superText = 'superscript';
var subText = 'subscript';

console.log('This is what a ' + superText.sup() + ' looks like.');
// This is what a &lt;sup&gt;superscript&lt;/sup&gt; looks like

console.log('This is what a ' + subText.sub() + ' looks like.');
// This is what a &lt;sub&gt;subscript&lt;/sub&gt; looks like.
</pre>

<h2 id="Especificação">Especificação</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Especificação</th>
   <th scope="col">Status</th>
   <th scope="col">Comentário</th>
  </tr>
  <tr>
   <td>{{SpecName('ES6', '#sec-string.prototype.sub', 'String.prototype.sub')}}</td>
   <td>{{Spec2('ES6')}}</td>
   <td>Definição inicial. Implementado no JavaScript 1.0.</td>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-string.prototype.sub', 'String.prototype.sub')}}</td>
   <td>{{Spec2('ESDraft')}}</td>
   <td></td>
  </tr>
 </tbody>
</table>

<h2 id="Navegadores_compatíveis">Navegadores compatíveis</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>Suporte básico</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatGeckoDesktop("1.0")}}</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>Suporte básico</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatGeckoMobile("1.0")}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="Veja_também">Veja também</h2>

<ul>
 <li>{{jsxref("String.prototype.sup()")}}</li>
</ul>