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+---
+title: String.prototype.toLowerCase()
+slug: Web/JavaScript/Reference/Global_Objects/String/toLowerCase
+tags:
+  - JavaScript
+  - Prototipo
+  - Referencia
+  - String
+  - metodo
+  - toLowerCase()
+translation_of: Web/JavaScript/Reference/Global_Objects/String/toLowerCase
+---
+<div>{{JSRef}}</div>
+
+<p>O método <strong><code>toLowerCase()</code></strong> retorna o valor da string que foi chamada convertido para minúsculo.</p>
+
+<h2 id="Sintaxe">Sintaxe</h2>
+
+<pre class="syntaxbox notranslate"><code><var>str</var>.toLowerCase()</code></pre>
+
+<h3 id="Valor_retornado">Valor retornado</h3>
+
+<p>Uma nova string contendo o valor da string original convertido para minúsculo.</p>
+
+<h2 id="Descrição">Descrição</h2>
+
+<p>O método <code>toLowerCase()</code> retorna o valor da string original convertido para minúsculo. <code>toLowerCase()</code> não altera o valor da string original.</p>
+
+<h2 id="Exemplos">Exemplos</h2>
+
+<h3 id="Usando_toLowerCase">Usando <code>toLowerCase()</code></h3>
+
+<pre class="brush: js notranslate">console.log('ALFABETO'.toLowerCase()); // 'alfabeto'
+</pre>
+
+<h2 id="Especificações">Especificações</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Especificação</th>
+   <th scope="col">Estado</th>
+   <th scope="col">Comentário</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES1')}}</td>
+   <td>{{Spec2('ES1')}}</td>
+   <td>Definição inicial. Implementada no JavaScript 1.0.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES5.1', '#sec-15.5.4.16', 'String.prototype.toLowerCase')}}</td>
+   <td>{{Spec2('ES5.1')}}</td>
+   <td></td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-string.prototype.tolowercase', 'String.prototype.toLowerCase')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td></td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-string.prototype.tolowercase', 'String.prototype.toLowerCase')}}</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>Recurso</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>{{CompatVersionUnknown}}</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>Recurso</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>{{CompatVersionUnknown}}</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.toLocaleLowerCase()")}}</li>
+ <li>{{jsxref("String.prototype.toLocaleUpperCase()")}}</li>
+ <li>{{jsxref("String.prototype.toUpperCase()")}}</li>
+</ul>