CINXE.COM
CSS At-Rules
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="keywords" content="CSS at-rules, @-rule, listed alphabetically, alphabetical list of at-rules"> <meta name="Description" content="CSS at-rules listed alphabetically."> <link rel="canonical" href="https://www.quackit.com/css/at-rules/"> <title>CSS At-Rules</title> <script src="//ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script> <link rel="shortcut icon" href="/pix/favicon96.png"> <link rel="apple-touch-icon" href="/pix/apple-touch-icon.png"> <link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin> <link href="https://fonts.googleapis.com/css2?family=Lato:ital,wght@0,400;0,700;1,400&display=swap" rel="stylesheet"> <link href="/common/css/master.45.min.css" rel="stylesheet"> <script async src="https://cdn.fuseplatform.net/publift/tags/2/3499/fuse.js"></script> <!-- Global site tag (gtag.js) - Google Analytics --> <script async src="https://www.googletagmanager.com/gtag/js?id=G-Q3H025ZKLN"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-Q3H025ZKLN'); </script> </head> <body> <header class="site-header"> <div class="site-header-base"> <div class="site-logo"> <a title="Quackit Homepage" target="_top" href="/"><img src="/pix/quackit_logo_watermark.png" width="87" height="33" alt="Quackit Logo"></a> </div> <button id="site-nav-toggler" class="site-nav-toggler" aria-expanded="false" aria-controls="site-nav"> <span class="sr-only">Toggle navigation</span> ☰ </button> </div> <nav id="site-nav" class="site-nav"> <div class="site-links"> <ul> <li><a href="/"><i class="fa fa-home"></i> <span class="sr-only">Home</span></a></li> <li><a href="/html/">HTML</a></li> <li><a href="/css/">CSS</a></li> <li><a href="/scripting/">Scripting</a></li> <li><a href="/database/">Database</a></li> </ul> </div> <div class="site-search-top"> <form action="/search/" id="cse-search-box-bottom" class="site-search"> <div> <input type="hidden" name="cx" value="partner-pub-6331358926293806:98x0fk-bbgi"> <input type="hidden" name="cof" value="FORID:10"> <input type="hidden" name="ie" value="ISO-8859-1"> <input type="text" name="q" size="20" class="site-search-input"> <button type="submit" name="sa" class="site-search-button"><i class="fa fa-search"></i></button> </div> </form> </div> </nav> </header> <div class="main"> <article class="content"> <h1 class="page-title">CSS At-Rules</h1> <div class="ad ad-top"> <!-- GAM 71161633/QCKIT_quackit/category_header --> <div data-fuse="23059883638"></div> </div> <p class="lead">Alphabetical list of CSS at-rules.</p> <div class="index"> <div class="cell"> <ul class="col-2"> <li><a href="/css/at-rules/css_bottom-center_at-rule.cfm">@bottom-center</a></li> <li><a href="/css/at-rules/css_bottom-left_at-rule.cfm">@bottom-left</a></li> <li><a href="/css/at-rules/css_bottom-left-corner_at-rule.cfm">@bottom-left-corner</a></li> <li><a href="/css/at-rules/css_bottom-right_at-rule.cfm">@bottom-right</a></li> <li><a href="/css/at-rules/css_bottom-right-corner_at-rule.cfm">@bottom-right-corner</a></li> <li><a href="/css/at-rules/css_charset_at-rule.cfm">@charset</a></li> <li><a href="/css/at-rules/css_counter-style_at-rule.cfm">@counter-style</a></li> <li><a href="/css/at-rules/css_document_at-rule.cfm">@document</a></li> <li><a href="/css/at-rules/css_font-face_at-rule.cfm">@font-face</a></li> <li><a href="/css/at-rules/css_font-feature-values_at-rule.cfm">@font-feature-values</a></li> <li><a href="/css/at-rules/css_import_at-rule.cfm">@import</a></li> <li><a href="/css/at-rules/css_left-bottom_at-rule.cfm">@left-bottom</a></li> <li><a href="/css/at-rules/css_left-middle_at-rule.cfm">@left-middle</a></li> <li><a href="/css/at-rules/css_left-top_at-rule.cfm">@left-top</a></li> <li><a href="/css/at-rules/css_keyframes_at-rule.cfm">@keyframes</a></li> <li><a href="/css/at-rules/css_media_at-rule.cfm">@media</a></li> <li><a href="/css/at-rules/css_namespace_at-rule.cfm">@namespace</a></li> <li><a href="/css/at-rules/css_page_at-rule.cfm">@page</a></li> <li><a href="/css/at-rules/css_right-bottom_at-rule.cfm">@right-bottom</a></li> <li><a href="/css/at-rules/css_right-middle_at-rule.cfm">@right-middle</a></li> <li><a href="/css/at-rules/css_right-top_at-rule.cfm">@right-top</a></li> <li><a href="/css/at-rules/css_supports_at-rule.cfm">@supports</a></li> <li><a href="/css/at-rules/css_top-center_at-rule.cfm">@top-center</a></li> <li><a href="/css/at-rules/css_top-left_at-rule.cfm">@top-left</a></li> <li><a href="/css/at-rules/css_top-left-corner_at-rule.cfm">@top-left-corner</a></li> <li><a href="/css/at-rules/css_top-right_at-rule.cfm">@top-right</a></li> <li><a href="/css/at-rules/css_top-right-corner_at-rule.cfm">@top-right-corner</a></li> </ul> </div> </div> <h2>About CSS at-rules</h2> <p>CSS is made up of properties, functions, at-rules (or @-rules), and more. The CSS specification defines how these features work by explaining the feature, and listing the values or data types that they accept. </p> <p>An <dfn>at-rule</dfn> is a CSS statement beginning with an at sign, <code>@</code> (U+0040 <a target="_blank" href="/html/html_editors/scratchpad/?app=charset_ref&entity=commat&hexadecimal=00040&decimal=64&unicodeName=COMMERCIAL_AT">COMMERCIAL AT</a>), followed by an identifier and includes everything up to the next semi-colon, <code>;</code> (U+003B <a target="_blank" href="/html/html_editors/scratchpad/?app=charset_ref&entity=semi&hexadecimal=0003B&decimal=59&unicodeName=SEMICOLON">SEMICOLON</a>), or the next CSS block, whichever comes first.</p> <p>For example, the <a href="/css/at-rule/css_font-face_at_rule.cfm"><code>@font-face</code></a> at-rule allows you to use a custom font so that you aren't solely reliant on the fonts that are installed on the user's computer. And the <a href="/css/at-rule/css_import_at_rule.cfm"><code>@import</code></a> at-rule can be used to import another style sheet into the current style sheet.</p> <p>While you could easily create a website that doesn't use any at-rules, they do provide extra functionality that could be difficult (or impossible) to achieve otherwise.</p> </article> <div class="sidebar"> <nav> <ul> <li> <h3><a href="/css/at-rules/">CSS @-rules</a></h3> <ul> <li><a href="/css/at-rules/css_bottom-center_at-rule.cfm">@bottom-center</a></li> <li><a href="/css/at-rules/css_bottom-left_at-rule.cfm">@bottom-left</a></li> <li><a href="/css/at-rules/css_bottom-left-corner_at-rule.cfm">@bottom-left-corner</a></li> <li><a href="/css/at-rules/css_bottom-right_at-rule.cfm">@bottom-right</a></li> <li><a href="/css/at-rules/css_bottom-right-corner_at-rule.cfm">@bottom-right-corner</a></li> <li><a href="/css/at-rules/css_charset_at-rule.cfm">@charset</a></li> <li><a href="/css/at-rules/css_counter-style_at-rule.cfm">@counter-style</a></li> <li><a href="/css/at-rules/css_document_at-rule.cfm">@document</a></li> <li><a href="/css/at-rules/css_font-face_at-rule.cfm">@font-face</a></li> <li><a href="/css/at-rules/css_font-feature-values_at-rule.cfm">@font-feature-values</a></li> <li><a href="/css/at-rules/css_import_at-rule.cfm">@import</a></li> <li><a href="/css/at-rules/css_left-bottom_at-rule.cfm">@left-bottom</a></li> <li><a href="/css/at-rules/css_left-middle_at-rule.cfm">@left-middle</a></li> <li><a href="/css/at-rules/css_left-top_at-rule.cfm">@left-top</a></li> <li><a href="/css/at-rules/css_keyframes_at-rule.cfm">@keyframes</a></li> <li><a href="/css/at-rules/css_media_at-rule.cfm">@media</a></li> <li><a href="/css/at-rules/css_namespace_at-rule.cfm">@namespace</a></li> <li><a href="/css/at-rules/css_page_at-rule.cfm">@page</a></li> <li><a href="/css/at-rules/css_right-bottom_at-rule.cfm">@right-bottom</a></li> <li><a href="/css/at-rules/css_right-middle_at-rule.cfm">@right-middle</a></li> <li><a href="/css/at-rules/css_right-top_at-rule.cfm">@right-top</a></li> <li><a href="/css/at-rules/css_supports_at-rule.cfm">@supports</a></li> <li><a href="/css/at-rules/css_top-center_at-rule.cfm">@top-center</a></li> <li><a href="/css/at-rules/css_top-left_at-rule.cfm">@top-left</a></li> <li><a href="/css/at-rules/css_top-left-corner_at-rule.cfm">@top-left-corner</a></li> <li><a href="/css/at-rules/css_top-right_at-rule.cfm">@top-right</a></li> <li><a href="/css/at-rules/css_top-right-corner_at-rule.cfm">@top-right-corner</a></li> </ul> </li> <li> <h3><a href="/css/at-rules/descriptors/">@-Rule Descriptors</a></h3> <ul> <li><a href="/css/at-rules/descriptors/css_additive-symbols_descriptor.cfm">additive-symbols</a></li> <li><a href="/css/css3/properties/css_bleed.cfm">bleed</a></li> <li><a href="/css/at-rules/descriptors/css_fallback_descriptor.cfm">fallback</a></li> <li><a href="/css/at-rules/descriptors/css_font-family_descriptor.cfm">font-family</a></li> <li><a href="/css/at-rules/descriptors/css_font-feature-settings_descriptor.cfm">font-feature-settings</a></li> <li><a href="/css/at-rules/descriptors/css_font-style_descriptor.cfm">font-style</a></li> <li><a href="/css/at-rules/descriptors/css_font-weight_descriptor.cfm">font-weight</a></li> <li><a href="/css/at-rules/descriptors/css_font-stretch_descriptor.cfm">font-stretch</a></li> <li><a href="/css/at-rules/descriptors/css_font-variant_descriptor.cfm">font-variant</a></li> <li><a href="/css/properties/css_marks.cfm">marks</a></li> <li><a href="/css/at-rules/descriptors/css_negative_descriptor.cfm">negative</a></li> <li><a href="/css/at-rules/descriptors/css_pad_descriptor.cfm">pad</a></li> <li><a href="/css/at-rules/descriptors/css_prefix_descriptor.cfm">prefix</a></li> <li><a href="/css/at-rules/descriptors/css_range_descriptor.cfm">range</a></li> <li><a href="/css/at-rules/descriptors/css_speak-as_descriptor.cfm">speak-as</a></li> <li><a href="/css/at-rules/descriptors/css_src_descriptor.cfm">src</a></li> <li><a href="/css/at-rules/descriptors/css_suffix_descriptor.cfm">suffix</a></li> <li><a href="/css/at-rules/descriptors/css_symbols_descriptor.cfm">symbols</a></li> <li><a href="/css/at-rules/descriptors/css_system_descriptor.cfm">system</a></li> <li><a href="/css/at-rules/descriptors/css_unicode-range_descriptor.cfm">unicode-range</a></li> </ul> </li> <li> <h3>Paged Media Concepts</h3> <ul> <li><a href="/css/at-rules/what_is_a_page-margin_box_in_css.cfm">What is a Page-Margin Box?</a></li> <li><a href="/css/at-rules/css_page-margin_properties_list.cfm">Page-Margin Properties List</a></li> <li><a href="/css/at-rules/css_page_properties_list.cfm">Page Properties List</a></li> </ul> </li> <li> <h3><a href="/css/reference/">CSS Reference</a></h3> <ul> <li><a href="/css/examples/" title="Copy & paste code examples.">CSS Examples</a></li> <li><a href="/css/properties/" title="All CSS properties listed alphabetically.">CSS Properties</a></li> <li><a href="/css/functions/" title="All CSS functions listed alphabetically.">CSS Functions</a></li> <li><a href="/css/data_types/" title="">CSS Data Types</a></li> <li><a href="/css/at-rules/" title="">CSS @-Rules</a></li> <li><a href="/css/selectors/" title="All CSS selectors.">CSS Selectors</a></li> <li><a href="/css/css3/animations/animatable_properties/" title="Properties that support CSS animations.">CSS Animatable Properties</a></li> <li><a href="/css/color/" title="Full CSS color reference, includes color picker, charts, generators, and more.">CSS Color</a></li> <li><a href="/css/css_color_codes.cfm" title="">CSS Color Codes</a></li> <li><a href="/css/tutorial/" title="">CSS Tutorial</a></li> <li><a href="/css/flexbox/tutorial/" title="">Flexbox Tutorial</a></li> <li><a href="/css/grid/tutorial/" title="">Grid Tutorial</a></li> <li><a href="/css/css_media_types.cfm" title="Use CSS to apply a separate style depending on the media type that is displaying your web page">CSS Media Types</a></li> <li><a href="/css/css_media_features.cfm" title="Use CSS to apply a separate style depending on the media features available in the output device">CSS Media Features</a></li> <li><a href="/bootstrap/tutorial/" title="Bootstrap is a free and open-source framework for creating websites and web applications.">Bootstrap Tutorial</a></li> <li><a href="/sass/tutorial/" title="Sass is a CSS preprocessor to help create maintainable style sheets.">Sass Tutorial</a></li> </ul> </li> </ul> </nav> <div class="ad ad-left"> <!-- GAM 71161633/QCKIT_quackit/category_vrec_2 --> <div data-fuse="23059883641"></div> </div> </div> <div class="ads"> <div class="ad ad-right"> <!-- GAM 71161633/QCKIT_quackit/category_vrec_1 --> <div data-fuse="23059511718"></div> </div> </div> </div> <div class="searchbox-bottom"> <form action="/search/" id="cse-search-box-bottom" class="site-search"> <div> <input type="hidden" name="cx" value="partner-pub-6331358926293806:npmuvy-i8kk"> <input type="hidden" name="cof" value="FORID:10"> <input type="hidden" name="ie" value="ISO-8859-1"> <input type="text" name="q" size="30" class="site-search-input"> <button type="submit" name="sa" class="site-search-button"><i class="fa fa-search"></i></button> </div> </form> <script src="//cse.google.com/cse/brand?form=cse-search-box-bottom&lang=en"></script> </div> <footer> <p class="about"><a href="/"><i class="fa fa-home"></i> Home</a> | <a href="/about.cfm" rel="nofollow">About</a> | <a href="/contact.cfm" rel="nofollow">Contact</a> | <a href="/terms_of_use.cfm" rel="nofollow">Terms of Use</a> | <a href="/privacy_policy.cfm" rel="nofollow">Privacy Policy</a></p> <p>© Copyright 2000 - 2025 Quackit.com </p> </footer> <script src="/common/js/spectrum/spectrum.js"></script> <script src="/common/js/lightbox2-master/dist/js/lightbox.min.js" charset="utf-8"></script> <script> $(document).ready(function(){ $( "#site-nav-toggler" ).click(function() { $( "#site-nav" ).toggle( "slow" ); }); }); </script> <script> $(function(){var a=window.location.href;$(".sidebar nav a").each(function(){a==this.href&&$(this).closest("li").addClass("selected")})}); </script> </body> </html>