atrules

Summary

At-rules are special instructions for the CSS parser. They are invoked by an at-keyword preceded by an “@” sign.

@charset

Specifies the character encoding of the style sheet.

@font-face

The @font-face CSS at-rule allows authors to specify online fonts to display text on their web pages. By allowing authors to provide their own fonts, @font-face eliminates the need to depend on the limited number of fonts users have installed on their computers.

@import

Imports an external style sheet.

@keyframes

Sets the keyframes for the CSS animation property.

@media

Sets the media types for a set of rules in a styleSheet object.

@namespace

Declares the default namespace and binds a namespace to a namespace prefix.

@page

Specifies properties of a page box, such as its dimensions, orientation, and margins. This is used for paged media, such as the printed page.

@region

Applies CSS styles to portions of content as it appears when flowing within a specified set of regions.

@supports

The CSS @supports at-rule lets authors detect support of CSS features directly in CSS.

@viewport

Specifies the size, zoom factor, and orientation of the viewport.