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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:41:45 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:41:45 -0500
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+---
+title: Selectores de clase
+slug: Web/CSS/Class_selectors
+tags:
+ - CSS
+ - Principiante
+ - Referencia CSS
+ - Selectores
+translation_of: Web/CSS/Class_selectors
+---
+<div>{{CSSRef("Selectors")}}</div>
+
+<p>En un documento HTML, los selectores de clase buscan un elemento basado en el contenido de su atributo <code>class</code>. El atributo {{htmlattrxref("class")}} está definido como una lista de elementos separados por espacio, y uno de esos elementos debe coincidir exactamente con el nombre de clase dado en el selector.</p>
+
+<h2 id="Sintaxis">Sintaxis</h2>
+
+<pre class="syntaxbox">.classname { <em>style properties</em> }</pre>
+
+<p>Nótese que esto es equivalente al siguiente {{Cssxref("Attribute_selectors", "selector de atributo")}}:</p>
+
+<pre class="syntaxbox">[class~=classname] { <em>style properties</em> }</pre>
+
+<h2 id="Ejemplo">Ejemplo</h2>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css">span.classy {
+ background-color: DodgerBlue;
+}
+</pre>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">&lt;span class="classy"&gt;Aquí hay un span con algo de texto.&lt;/span&gt;
+&lt;span&gt;Aquí hay otro.&lt;/span&gt;
+</pre>
+
+<p>{{EmbedLiveSample('Ejemplo', 200, 50)}}</p>
+
+<h2 id="Especificaciones">Especificaciones</h2>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">Especificación</th>
+ <th scope="col">Estatus</th>
+ <th scope="col">Comentarios</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{SpecName('CSS4 Selectors', '#class-html', 'class selectors')}}</td>
+ <td>{{Spec2('CSS4 Selectors')}}</td>
+ <td>Sin cambios</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('CSS3 Selectors', '#class-html', 'class selectors')}}</td>
+ <td>{{Spec2('CSS3 Selectors')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('CSS2.1', 'selector.html#class-html', 'child selectors')}}</td>
+ <td>{{Spec2('CSS2.1')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('CSS1', '#class-as-selector', 'child selectors')}}</td>
+ <td>{{Spec2('CSS1')}}</td>
+ <td>Definición inicial</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilidad_de_navegadores">Compatibilidad de navegadores</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Característica</th>
+ <th>Chrome</th>
+ <th>Edge</th>
+ <th>Firefox (Gecko)</th>
+ <th>Internet Explorer</th>
+ <th>Opera</th>
+ <th>Safari</th>
+ </tr>
+ <tr>
+ <td>Soporte básico</td>
+ <td>{{CompatVersionUnknown}}</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>Característica</th>
+ <th>Android</th>
+ <th>Chrome for Android</th>
+ <th>Edge</th>
+ <th>Firefox Mobile (Gecko)</th>
+ <th>IE Mobile</th>
+ <th>Opera Mobile</th>
+ <th>Safari Mobile</th>
+ </tr>
+ <tr>
+ <td>Soporte básico</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>