path: root/files/pt-br/web/css/background-attachment/index.html

---
title: background-attachment
slug: Web/CSS/background-attachment
translation_of: Web/CSS/background-attachment
---
<div>{{CSSRef}}</div>

<h2 id="Resumo">Resumo</h2>

<p>Se um {{cssxref("background-image")}} é especificado, a propriedade <a href="/en-US/docs/CSS" title="CSS">CSS</a> <strong><code>background-attachment</code></strong> determina se aquela posição da imagem é fixa com o viewport, ou se irá rolar juntamente com o seu bloco.</p>

<p>{{cssinfo}}</p>

<h2 id="Syntax" name="Syntax">Sintaxe</h2>

<pre class="brush: css">background-attachment: scroll;
background-attachment: fixed;
background-attachment: local;

background-attachment: inherit;
</pre>

<h3 id="Valores">Valores</h3>

<dl>
 <dt><code>fixed</code></dt>
 <dd>Essa chave significa que o background é fixo em relação ao viewport. Mesmo que um elemento tenha um mecanismo de rolar, o  background ‘fixed’ não movimenta com o elemento.</dd>
 <dt><code>local</code></dt>
 <dd>Essa chave significa que o background é fixo em relação ao conteúdo do elemento: ise ele tem um mecanismo de rolar, o background rola com o conteúdo do elemento, e a área pintada e o posicionamento do background são relativos à área de rolagem do elemento ao invés da borda de fronteira deles.</dd>
 <dt><code>scroll</code></dt>
 <dd>Essa chave significa que o background é fixo em relação ao elemento em si e não rola com seu conteúdo. (É efetivamente ligado à borda do elemento.)</dd>
 <dt>
 <h3 id="Formal_syntax">Formal syntax</h3>
 </dt>
</dl>

{{csssyntax}}

<h2 id="Examples" name="Examples">Exemplos</h2>

<h3 id="Exemplo_simpes">Exemplo simpes</h3>

<h4 id="CSS">CSS</h4>

<pre class="brush:css; highlight:[3];">p {
  background-image: url("https://mdn.mozillademos.org/files/12057/starsolid.gif");
  background-attachment: fixed;
}
</pre>

<h4 id="HTML">HTML</h4>

<pre class="brush: html">&lt;p&gt;
  There were doors all round the hall, but they were all locked; and when
  Alice had been all the way down one side and up the other, trying every
  door, she walked sadly down the middle, wondering how she was ever to
  get out again.
&lt;/p&gt;</pre>

<h4 id="Resultado">Resultado</h4>

<p>{{EmbedLiveSample("Simple_example")}}</p>

<h3 id="Suporte_de_múltiplas_imagem_de_background">Suporte de múltiplas imagem de background</h3>

<p>Essa propriedade suporta múltiplas imagens de background. Você pode especificar <code>&lt;attachment&gt;</code> para cada background, separado por vírgulas. Cada imagem é combinada com o correspondente tipo de anexo, do primeiro especificado ao último.</p>

<h4 id="CSS_2">CSS</h4>

<pre class="brush:css; highlight:[3];">p {
  background-image: url("https://mdn.mozillademos.org/files/12057/starsolid.gif"), url("https://mdn.mozillademos.org/files/12059/startransparent.gif");
  background-attachment: fixed, scroll;
  background-repeat: no-repeat, repeat-y;
}</pre>

<h4 id="HTML_2">HTML</h4>

<pre class="brush: html">&lt;p&gt;
  There were doors all round the hall, but they were all locked; and when
  Alice had been all the way down one side and up the other, trying every
  door, she walked sadly down the middle, wondering how she was ever to
  get out again.

  Suddenly she came upon a little three-legged table, all made of solid
  glass; there was nothing on it except a tiny golden key, and Alice's
  first thought was that it might belong to one of the doors of the hall;
  but, alas! either the locks were too large, or the key was too small,
  but at any rate it would not open any of them. However, on the second
  time round, she came upon a low curtain she had not noticed before, and
  behind it was a little door about fifteen inches high: she tried the
  little golden key in the lock, and to her great delight it fitted!
&lt;/p&gt;</pre>

<h4 id="Resultado_2">Resultado</h4>

<p>{{EmbedLiveSample("Multiple_background_image_support")}}</p>

<h2 id="Especificações">Especificações</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Especificação</th>
   <th scope="col">Status</th>
   <th scope="col">Comentário</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{SpecName('CSS3 Backgrounds', '#the-background-attachment', 'background-attachment')}}</td>
   <td>{{Spec2('CSS3 Backgrounds')}}</td>
   <td>The shorthand property has been extended to support multiple backgrounds and the <code>local</code> value.</td>
  </tr>
  <tr>
   <td>{{SpecName('CSS2.1', 'colors.html#propdef-background-attachment', 'background-attachment')}}</td>
   <td>{{Spec2('CSS2.1')}}</td>
   <td>Mudança não significativa.</td>
  </tr>
  <tr>
   <td>{{SpecName('CSS1', '#background-attachment', 'background-attachment')}}</td>
   <td>{{Spec2('CSS1')}}</td>
   <td>Mudança não significativa</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Compatibilidade com navegadores</h2>

<p>{{CompatibilityTable}}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>1.0</td>
   <td>{{CompatGeckoDesktop("1.0")}}</td>
   <td>4.0</td>
   <td>3.5</td>
   <td>1.0</td>
  </tr>
  <tr>
   <td>Multiple backgrounds</td>
   <td>1.0</td>
   <td>{{CompatGeckoDesktop("1.9.2")}}</td>
   <td>9.0</td>
   <td>10.5</td>
   <td>1.3</td>
  </tr>
  <tr>
   <td><code>local</code></td>
   <td>4.0</td>
   <td>{{CompatGeckoDesktop("25")}}</td>
   <td>9.0</td>
   <td>10.5</td>
   <td>5.0</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Phone</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>2.1</td>
   <td>{{CompatGeckoMobile("1.9.2")}}</td>
   <td>{{CompatUnknown}}</td>
   <td>10.0</td>
   <td>3.2</td>
  </tr>
  <tr>
   <td>Multiple backgrounds</td>
   <td>2.1</td>
   <td>{{CompatGeckoMobile("1.9.2")}}</td>
   <td>{{CompatUnknown}}</td>
   <td>10.0</td>
   <td>3.2</td>
  </tr>
  <tr>
   <td><code>local</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatGeckoMobile("25")}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="Veja_também">Veja também</h2>

<ul>
 <li><a href="/en-US/docs/CSS/Multiple_backgrounds" title="CSS/Multiple backgrounds">Multiple backgrounds</a></li>
</ul>