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---
title: CSS - Referência
slug: Web/CSS/Referência_CSS
tags:
- CSS
- Referencia
- Resumo
- Sinopse
- 'l10n:priority'
translation_of: Web/CSS/Reference
---
<div>{{CSSRef}}</div>
<p class="summary">Utilize esta <strong>referência de CSS </strong>para explorar<strong> </strong>um <a href="/pt-PT/docs/Web/CSS/Referência_CSS#Índex_de_palavra-chave">índex alfabético</a> de todas as propriedades de <a href="/pt-PT/docs/Web/CSS">CSS</a> padrão, <a href="/pt-PT/docs/Web/CSS/Pseudoclasses">pseudoclasses, </a><a href="/pt-PT/docs/Web/CSS/Pseudoelementos">pseudoelementos</a>, <a href="/pt-PT/docs/Web/CSS/CSS_Tipos">tipos de dados</a>, e <a href="/pt-PT/docs/Web/CSS/At-rule">regras "at"</a>. Também pode explorar uma lista de todos os <a href="/pt-PT/docs/Web/CSS/Refer%C3%AAncia_CSS">seletores de CSS organizados pelo tipo</a> e uma lista de <a href="/pt-PT/docs/Web/CSS/Refer%C3%AAncia_CSS$edit#Concepts">conceitos de CSS chave</a>. Também incluido nesta breve <a href="/pt-PT/docs/Web/CSS/Refer%C3%AAncia_CSS$edit#DOM-CSS_CSSOM">referência de DOM-CSS / CSSOM</a>.</p>
<h2 id="Sintaxe_Básica">Sintaxe Básica</h2>
<h3 id="Estilo_padrão_de_sintaxe">Estilo padrão de sintaxe</h3>
<pre class="syntaxbox notranslate"><strong><var>selectorlist</var> {
<var>property</var>: <var>value</var>;</strong>
<var>[more property:value; pairs]</var>
<strong>}</strong>
... where <var>selectorlist</var> is: <var>selector[:pseudo-class] [::pseudo-element] [, more selectorlists]</var>
See <a href="#Selectors"><em>selector</em></a>, <a href="#pcls"><em>pseudo-class</em></a>, <em><a href="#pelm">pseudo-element</a></em> lists below.
</pre>
<h4 id="Exemplos_de_regra_de_estilo">Exemplos de regra de estilo</h4>
<pre class="brush: css notranslate">strong {
color: red;
}
div.menu-bar li:hover > ul {
display: block;
}
</pre>
<p>For a beginner-level introduction to the syntax of CSS selectors, please see <a href="/en-US/docs/Learn/CSS/Introduction_to_CSS/Selectors">this tutorial</a>. Be aware that any <a href="/en-US/docs/Web/CSS/syntax">CSS syntax</a> error in a rule definition invalidates the entire rule. Invalid rules are ignored by the browser. Note that CSS rule definitions are entirely (ASCII) <a href="https://www.w3.org/TR/css-syntax-3/#intro">text-based</a>, whereas DOM-CSS / CSSOM (the rule management system) is <a href="https://www.w3.org/TR/cssom/#introduction">object-based</a>.</p>
<h3 id="Sintaxe_de_regra_At">Sintaxe de regra "At"</h3>
<p>As the structure of at-rules varies widely, please see <a href="/en-US/docs/Web/CSS/At-rule">At-rule</a> to find the syntax of the specific one you want.</p>
<h2 id="Índex_de_palavra-chave">Índex de palavra-chave</h2>
<div class="blockIndicator note">
<p><strong>Nota:</strong> Os nomes das propriadades neste índex <strong>não</strong> incluem os <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Properties_Reference">nomes de JavaScript </a>onde eles diferem com nomes padrão de CSS.</p>
</div>
<div>{{CSS_Ref}}</div>
<h2 id="Seletors"><a href="/en-US/docs/Web/CSS/CSS_Selectors">Seletors</a></h2>
<div class="hidden">
<div class="blockIndicator todo">
<p><strong>TODO:</strong> Consider using the <code><a href="https://github.com/mdn/kumascript/blob/master/macros/page.ejs">\{{Page}}</a></code> macro for this section.</p>
</div>
</div>
<h3 id="Seletores_básicos"><a href="/en-US/docs/Web/CSS/CSS_Selectors#Basic_selectors">Seletores básicos</a></h3>
<ul>
<li><a href="/en-US/docs/Web/CSS/Type_selectors">Type selector</a> <code>elementname</code></li>
<li><a href="/en-US/docs/Web/CSS/Class_selectors">Class selector</a> <code>.classname</code></li>
<li><a href="/en-US/docs/Web/CSS/ID_selectors">ID selector</a> <code>#idname</code></li>
<li><a href="/en-US/docs/Web/CSS/Universal_selectors">Universal selector</a> <code>*</code>, <code>ns|*</code>, <code>*|*</code>, <code>|*</code></li>
<li><a href="/en-US/docs/Web/CSS/Attribute_selectors">Attribute selector</a> <code>[attr=value]</code></li>
</ul>
<h3 id="Combinadores"><a href="/en-US/docs/Web/CSS/CSS_Selectors#Combinators">Combinadores</a></h3>
<ul>
<li><a href="/en-US/docs/Web/CSS/Adjacent_sibling_selectors">Adjacent sibling combinator</a> <code>A + B</code></li>
<li><a href="/en-US/docs/Web/CSS/General_sibling_selectors">General sibling combinator</a> <code>A ~ B</code></li>
<li><a href="/en-US/docs/Web/CSS/Child_selectors">Child combinator</a> <code>A > B</code></li>
<li><a href="/en-US/docs/Web/CSS/Descendant_selectors">Descendant combinator</a> <code>A B</code></li>
<li><a href="/en-US/docs/Web/CSS/Column_combinator">Column combinator</a> <code>A || B</code> {{Experimental_Inline}}</li>
</ul>
<h3 id="Pseudoclasses"><a href="/pt-PT/docs/Web/CSS/Pseudoclasses">Pseudoclasses</a></h3>
<div class="index">
<ul>
<li class="hidden">{{Page("/en-US/docs/Web/CSS/Pseudo-classes", "index")}}</li>
</ul>
</div>
<h3 id="Pseudoelementos"><a href="/pt-PT/docs/Web/CSS/Pseudoelementos">Pseudoelementos</a></h3>
<div class="index">
<ul>
<li class="hidden">{{Page("/en-US/docs/Web/CSS/Pseudo-elements", "index")}}</li>
</ul>
</div>
<div class="blockIndicator note">
<p><strong>Consulte também:</strong> uma <a href="https://www.w3.org/TR/selectors/#selectors">lista de seletores</a> completa na especificação de Seletores Nível 3.</p>
</div>
<h2 id="Conceitos">Conceitos</h2>
<h3 id="Sintaxe_e_semântica">Sintaxe e semântica</h3>
<ul>
<li><a href="/en-US/docs/Web/CSS/Syntax">CSS syntax</a></li>
<li><a href="/en-US/docs/Web/CSS/At-rule">At-rules</a></li>
<li><a href="/en-US/docs/Web/CSS/Cascade">Cascade</a></li>
<li><a href="/en-US/docs/Web/CSS/Comments">Comments</a></li>
<li><a href="/en-US/docs/Glossary/Descriptor_(CSS)">Descriptor</a></li>
<li><a href="/en-US/docs/Web/CSS/inheritance">Inheritance</a></li>
<li><a href="/en-US/docs/Web/CSS/Shorthand_properties">Shorthand properties</a></li>
<li><a href="/en-US/docs/Web/CSS/Specificity">Specificity</a></li>
<li><a href="/en-US/docs/Web/CSS/Value_definition_syntax">Value definition syntax</a></li>
</ul>
<h3 id="Valores">Valores</h3>
<ul>
<li><a href="/en-US/docs/Web/CSS/actual_value">Actual value</a></li>
<li><a href="/en-US/docs/Web/CSS/computed_value">Computed value</a></li>
<li><a href="/en-US/docs/Web/CSS/initial_value">Initial value</a></li>
<li><a href="/en-US/docs/Web/CSS/resolved_value">Resolved value</a></li>
<li><a href="/en-US/docs/Web/CSS/specified_value">Specified value</a></li>
<li><a href="/en-US/docs/Web/CSS/used_value">Used value</a></li>
</ul>
<h3 id="Layout">Layout</h3>
<ul>
<li><a href="/en-US/docs/Web/Guide/CSS/Block_formatting_context">Block formatting context</a></li>
<li><a href="/en-US/docs/Web/CSS/box_model">Box model</a></li>
<li><a href="/en-US/docs/Web/CSS/All_About_The_Containing_Block">Containing block</a></li>
<li><a href="/en-US/docs/Web/CSS/Layout_mode">Layout mode</a></li>
<li><a href="/en-US/docs/Web/CSS/CSS_Box_Model/Mastering_margin_collapsing">Margin collapsing</a></li>
<li><a href="/en-US/docs/Web/CSS/Replaced_element">Replaced elements</a></li>
<li><a href="/en-US/docs/Web/CSS/CSS_Positioning/Understanding_z_index/The_stacking_context">Stacking context</a></li>
<li><a href="/en-US/docs/Web/Guide/CSS/Visual_formatting_model">Visual formatting model</a></li>
</ul>
<h2 id="DOM-CSS_CSSOM">DOM-CSS / CSSOM</h2>
<h3 id="Major_object_types">Major object types</h3>
<ul>
<li>document.<a href="/en-US/docs/Web/API/Document/styleSheets">styleSheets</a></li>
<li>styleSheets[i].<a href="/en-US/docs/Web/API/CSSRuleList">cssRules</a></li>
<li>cssRules[i].<a href="/en-US/docs/Web/API/CSSRule/cssText">cssText</a> (selector & style)</li>
<li>cssRules[i].<a href="/en-US/docs/Web/API/CSSStyleRule/selectorText">selectorText</a></li>
<li>elem.<a href="/en-US/docs/Web/API/HTMLElement/style">style</a></li>
<li>elem.style.<a href="/en-US/docs/Web/API/CSSStyleDeclaration/cssText">cssText</a> (just style)</li>
<li>elem.<a href="/en-US/docs/Web/API/Element/className">className</a></li>
<li>elem.<a href="/en-US/docs/Web/API/Element/classList">classList</a></li>
</ul>
<h3 id="Métodos_importantes">Métodos importantes</h3>
<ul>
<li>{{domxref("CSSStyleSheet.insertRule")}}</li>
<li>{{domxref("CSSStyleSheet.deleteRule")}}</li>
</ul>
<h2 id="Consultar_também">Consultar também:</h2>
<ul>
<li><a href="/en-US/docs/Web/CSS/Mozilla_Extensions">Mozilla CSS extensions</a> (prefixed with <code>-moz</code>)</li>
<li><a href="/en-US/docs/Web/CSS/Webkit_Extensions">WebKit CSS extensions</a> (mostly prefixed with <code>-webkit</code>)</li>
<li><a href="/en-US/docs/Web/CSS/Microsoft_CSS_extensions">Microsoft CSS extensions</a> (prefixed with <code>-ms</code>)</li>
</ul>
|
