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+---
+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>