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+---
+title: ':nth-child'
+slug: 'Web/CSS/:nth-child'
+tags:
+  - CSS
+  - Layout
+  - Pseudo-class
+  - Reference
+  - Web
+translation_of: 'Web/CSS/:nth-child'
+---
+<div>{{CSSRef}}</div>
+
+<p>La <a href="/en-US/docs/Web/CSS/Pseudo-classes">pseudo-class</a> <a href="/en-US/docs/Web/CSS">CSS</a> <strong><code>:nth-child()</code></strong> <a href="/en-US/docs/Web/CSS">CSS</a> <span id="result_box" lang="ca"><span>coincideix amb un o més elements basats en la seva posició entre un grup de germans.</span></span></p>
+
+<pre class="brush: css no-line-numbers">/* <span id="result_box" lang="ca"><span>Selecciona cada quart element entre qualsevol grup de germans</span></span> */
+:nth-child(4n) {
+  color: lime;
+}
+</pre>
+
+<h2 id="Syntax" name="Syntax">Sintaxi</h2>
+
+<p>La pseudo-class <code>nth-child</code> s'especifica amb un únic argument, que representa el patró per als elements coincidents.</p>
+
+<h3 id="Valors_de_paraules_clau">Valors de paraules clau</h3>
+
+<dl>
+ <dt><code>odd</code></dt>
+ <dd>Representa elements, la posició numèrica dels quals, en una sèrie de germans és imparell: 1, 3, 5, etc.</dd>
+ <dt><code>even</code></dt>
+ <dd>Representa elements, la posició numèrica dels quals, en una sèrie de germans és parell: 2, 4, 6, etc.</dd>
+</dl>
+
+<h3 id="Notació_funcional">Notació funcional</h3>
+
+<dl>
+ <dt><code>&lt;An+B&gt;</code></dt>
+ <dd>Representa elements, la posició numèrica dels quals, en una sèrie de germans coincideix amb el patró <code>An+B</code>, per a cada enter positiu o valor zero de <code>n</code>. L'índex del primer element és <code>1</code>. Els valors <code>A</code> i <code>B</code> han de ser {{cssxref("&lt;integer&gt;")}}s.</dd>
+</dl>
+
+<h3 id="Sintaxi_formal">Sintaxi formal</h3>
+
+<pre class="syntaxbox">{{csssyntax}}
+</pre>
+
+<h2 id="Examples" name="Examples">Exemples</h2>
+
+<h3 id="Example_selectors" name="Example_selectors">Exemple de selectors</h3>
+
+<dl>
+ <dt><code>tr:nth-child(odd)</code> or <code>tr:nth-child(2n+1)</code></dt>
+ <dd>Representa les files imparells d'una taula HTML: 1, 3, 5, etc.</dd>
+ <dt><code>tr:nth-child(even)</code> or <code>tr:nth-child(2n)</code></dt>
+ <dd>Representa les files parells d'una taula HTML: 2, 4, 6, etc.</dd>
+ <dt><code>:nth-child(5n)</code></dt>
+ <dd>Representa elements 5, 10, 15, etc.</dd>
+ <dt><code>:nth-child(3n+4)</code></dt>
+ <dd>Representa elements 4, 7, 10, 13, etc.</dd>
+ <dt><code>:nth-child(-n+3)</code></dt>
+ <dd><span id="result_box" lang="ca"><span>Representa els tres primers elements entre un grup de germans.</span></span></dd>
+ <dt><code>p:nth-child(n)</code></dt>
+ <dd><span id="result_box" lang="ca"><span>Representa cada element</span></span> <code>&lt;p&gt;</code> <span id="result_box" lang="ca"><span>entre un grup de germans.</span> <span>Això és el mateix que un simple selector</span></span> <code>p</code> .</dd>
+ <dt><code>p:nth-child(1)</code> or <code>p:nth-child(0n+1)</code></dt>
+ <dd><span id="result_box" lang="ca"><span>Representa cada</span></span> <code>&lt;p&gt;</code> <span id="result_box" lang="ca"><span>aquest és el primer element entre un grup de germans.</span> <span>Això és el mateix que el selector</span></span> {{cssxref(":first-child")}}.</dd>
+</dl>
+
+<h3 id="Exemple_detallat">Exemple detallat</h3>
+
+<h4 id="HTML">HTML</h4>
+
+<pre class="brush:html">&lt;h3&gt;&lt;code&gt;span:nth-child(2n+1)&lt;/code&gt;, WITHOUT an
+   &lt;code&gt;&amp;lt;em&amp;gt;&lt;/code&gt; among the child elements.&lt;/h3&gt;
+&lt;p&gt;Children 1, 3, 5, and 7 are selected.&lt;/p&gt;
+&lt;div class="first"&gt;
+  &lt;span&gt;Span 1!&lt;/span&gt;
+  &lt;span&gt;Span 2&lt;/span&gt;
+  &lt;span&gt;Span 3!&lt;/span&gt;
+  &lt;span&gt;Span 4&lt;/span&gt;
+  &lt;span&gt;Span 5!&lt;/span&gt;
+  &lt;span&gt;Span 6&lt;/span&gt;
+  &lt;span&gt;Span 7!&lt;/span&gt;
+&lt;/div&gt;
+
+&lt;br&gt;
+
+&lt;h3&gt;&lt;code&gt;span:nth-child(2n+1)&lt;/code&gt;, WITH an
+   &lt;code&gt;&amp;lt;em&amp;gt;&lt;/code&gt; among the child elements.&lt;/h3&gt;
+&lt;p&gt;Children 1, 5, and 7 are selected.&lt;br&gt;
+   3 is used in the counting because it is a child, but it isn't
+   selected because it isn't a &lt;code&gt;&amp;lt;span&amp;gt;&lt;/code&gt;.&lt;/p&gt;
+&lt;div class="second"&gt;
+  &lt;span&gt;Span!&lt;/span&gt;
+  &lt;span&gt;Span&lt;/span&gt;
+  &lt;em&gt;This is an `em`.&lt;/em&gt;
+  &lt;span&gt;Span&lt;/span&gt;
+  &lt;span&gt;Span!&lt;/span&gt;
+  &lt;span&gt;Span&lt;/span&gt;
+  &lt;span&gt;Span!&lt;/span&gt;
+  &lt;span&gt;Span&lt;/span&gt;
+&lt;/div&gt;
+
+&lt;br&gt;
+
+&lt;h3&gt;&lt;code&gt;span:nth-of-type(2n+1)&lt;/code&gt;, WITH an
+   &lt;code&gt;&amp;lt;em&amp;gt;&lt;/code&gt; among the child elements.&lt;/h3&gt;
+&lt;p&gt;Children 1, 4, 6, and 8 are selected.&lt;br&gt;
+   3 isn't used in the counting or selected because it is an &lt;code&gt;&amp;lt;em&amp;gt;&lt;/code&gt;,
+   not a &lt;code&gt;&amp;lt;span&amp;gt;&lt;/code&gt;, and &lt;code&gt;nth-of-type&lt;/code&gt; only selects
+   children of that type. The &lt;code&gt;&amp;lt;em&amp;gt;&lt;/code&gt; is completely skipped
+   over and ignored.&lt;/p&gt;
+&lt;div class="third"&gt;
+  &lt;span&gt;Span!&lt;/span&gt;
+  &lt;span&gt;Span&lt;/span&gt;
+  &lt;em&gt;This is an `em`.&lt;/em&gt;
+  &lt;span&gt;Span!&lt;/span&gt;
+  &lt;span&gt;Span&lt;/span&gt;
+  &lt;span&gt;Span!&lt;/span&gt;
+  &lt;span&gt;Span&lt;/span&gt;
+  &lt;span&gt;Span!&lt;/span&gt;
+&lt;/div&gt;
+</pre>
+
+<h4 id="CSS">CSS</h4>
+
+<pre class="brush: css">html {
+  font-family: sans-serif;
+}
+
+span,
+div em {
+  padding: 5px;
+  border: 1px solid green;
+  display: inline-block;
+  margin-bottom: 3px;
+}
+
+.first span:nth-child(2n+1),
+.second span:nth-child(2n+1),
+.third span:nth-of-type(2n+1) {
+  background-color: lime;
+}</pre>
+
+<h4 id="Resultat">Resultat</h4>
+
+<p>{{EmbedLiveSample('Detailed_example', 550, 550)}}</p>
+
+<h2 id="Especificacions">Especificacions</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Especificació</th>
+   <th scope="col">Estat</th>
+   <th scope="col">Comentari</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('CSS4 Selectors', '#nth-child-pseudo', ':nth-child')}}</td>
+   <td>{{Spec2('CSS4 Selectors')}}</td>
+   <td><span id="result_box" lang="ca"><span>Afegeix la sintaxi</span></span> <code>del &lt;selector&gt;</code> <span id="result_box" lang="ca"><span>i especifica que els elements coincidents no són necessaris per tenir un pare.</span></span></td>
+  </tr>
+  <tr>
+   <td>{{SpecName('CSS3 Selectors', '#nth-child-pseudo', ':nth-child')}}</td>
+   <td>{{Spec2('CSS3 Selectors')}}</td>
+   <td>Definició inicial.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Navegadors_compatibles">Navegadors compatibles</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Descripció</th>
+   <th>Chrome</th>
+   <th>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Suport bàsic</td>
+   <td>{{CompatChrome(1)}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoDesktop("1.9.1")}}</td>
+   <td>9.0</td>
+   <td>{{CompatOpera(9.5)}}<sup>[1]</sup></td>
+   <td>3.1</td>
+  </tr>
+  <tr>
+   <td>sintaxi <code>del &lt;selector&gt;</code></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}<sup>[2]</sup></td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+  <tr>
+   <td>No es requereix cap pare</td>
+   <td>{{CompatChrome(57)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatGeckoDesktop("51")}}[3]</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatOpera(44)}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Descripció</th>
+   <th>Android Webview</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>Suport bàsic</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("1.9.1")}}<sup>[2]</sup></td>
+   <td>9.0</td>
+   <td>{{CompatOperaMobile(9.5)}}<sup>[1]</sup></td>
+   <td>3.1</td>
+  </tr>
+  <tr>
+   <td>sintaxi <code>del &lt;selector&gt;</code></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}<sup>[2]</sup></td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+  <tr>
+   <td>No es requereix cap pare</td>
+   <td>{{CompatChrome(57)}}</td>
+   <td>{{CompatChrome(57)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatGeckoMobile("51")}}<sup>[3]</sup></td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatOperaMobile(44)}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<p>[1] Opera no pot gestionar la inserció dinàmica dels elements</p>
+
+<p>[2] Gecko encara no implementa aquesta funció. Vegeu {{bug(854148)}}.</p>
+
+<p>[3] Vegeu {{bug(1300374)}}.</p>
+
+<h2 id="See_also" name="See_also">Vegeu també</h2>
+
+<ul>
+ <li>{{ Cssxref(":nth-of-type") }}, {{ Cssxref(":nth-last-child") }}</li>
+</ul>