---
title: Selector ID
slug: Web/CSS/ID_selectors
tags:
  - CSS
  - Reference
  - Selectors
translation_of: Web/CSS/ID_selectors
original_slug: Web/CSS/Selectors_ID
---
<div>{{CSSRef}}</div>

<p><span id="result_box" lang="ca"><span>En un document HTML, el</span></span> <strong>selector</strong> <strong>ID </strong> <span id="result_box" lang="ca"><span>CSS coincideix amb un element basat en el valor del seu atribut</span></span> {{htmlattrxref("ID")}}. <span id="result_box" lang="ca"><span>L'atribut</span></span> <code>ID</code> <span id="result_box" lang="ca"><span>de l'element seleccionat ha de coincidir exactament amb el valor indicat en el selector</span></span></p>

<pre class="brush: css no-line-numbers">/* The element with id="demo" */
div#demo {
  border: red 2px solid;
}</pre>

<h2 id="Sintaxi">Sintaxi</h2>

<pre class="syntaxbox">#id_value { <em>style properties</em> }</pre>

<p><span class="short_text" id="result_box" lang="ca"><span>Recordeu que</span> <span>això és</span> <span>equivalent al</span> <span>següent</span></span> {{Cssxref("Attribute_selectors", "attribute selector")}}:</p>

<pre class="syntaxbox">[id=id_value] { <em>style properties</em> }</pre>

<h2 id="Exemple">Exemple</h2>

<h3 id="CSS">CSS</h3>

<pre class="brush: css">div#identified {
  background-color: skyblue;
}
</pre>

<h3 id="HTML">HTML</h3>

<pre class="brush: html">&lt;div id="identified"&gt;This div has a special ID on it!&lt;/div&gt;
&lt;div&gt;This is just a regular div.&lt;/div&gt;
</pre>

<h3 id="Resultat">Resultat</h3>

<p>{{EmbedLiveSample("Example", '100%', 50)}}</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", "#id-selectors", "ID selectors")}}</td>
   <td>{{Spec2("CSS4 Selectors")}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName("CSS3 Selectors", "#id-selectors", "ID selectors")}}</td>
   <td>{{Spec2("CSS3 Selectors")}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName("CSS2.1", "selector.html#id-selectors", "ID selectors")}}</td>
   <td>{{Spec2("CSS2.1")}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName("CSS1", "#id-as-selector", "ID selectors")}}</td>
   <td>{{Spec2("CSS1")}}</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>{{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>Descripció</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>Suport bàsic</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>