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scripting
scripting is a CSS media feature that can be used to check whether scripting (e.g., JavaScript) is available.update
update is a CSS media feature that can be used to check how quickly (if at all) the output device is able to modify the appearance of the content.width
The width CSS descriptor is shorthand for setting both the min-width and the max-width of the viewport. By providing one viewport length value, that value will determine both the min-width and the max-width to the value provided.
At-rule
An at-rule is a CSS statement beginning with an at sign, '
@' (U+0040 COMMERCIAL AT), followed by an identifier and includes everything up to the next semi-colon, ';' (U+003B SEMICOLON), or the next CSS block, whichever comes first.content
The
content CSS property is used with the ::before and ::after pseudo-elements to generate content in an element. Objects inserted using the content property are anonymous replaced elements.CSS Columns
CSS Columns is a module of CSS that defines a multi-column layout, allowing to express how content should flow between columns and how gaps and rules are handled.
CSS Miscellaneous
These pages contain CSS properties that are highly experimental or don't fit in any other categories.
Using URL values for the cursor property
Gecko 1.8 (Firefox 1.5, SeaMonkey 1.0) supports URL values for the CSS
cursor property on Windows and Linux. Mac support was added in Gecko 2 (Firefox 4). This allows specifying arbitrary images as mouse cursors — any image format supported by Gecko can be used.CSS3
CSS3 is the latest evolution of the Cascading Style Sheets language and aims at extending CSS2.1. It brings a lot of long-awaited novelties, like rounded corners, shadows, gradients, transitions or animations, as well as new layouts like multi-columns, flexible box or grid layouts. Experimental parts are vendor-prefixed and should either be avoided in production environments, or used with extreme caution as both their syntax and semantics can change in the future.
direction
Set the
direction CSS property to match the direction of the text: rtl for languages written from right-to-left (like Hebrew or Arabic) text and ltr for other scripts. This is typically done as part of the document (e.g., using the dir attribute in HTML) rather than through direct use of CSS.font-smooth
The
font-smooth CSS property controls the application of anti-aliasing when fonts are rendered.height
The
height CSS property specifies the height of the content area of an element. The content area is inside the padding, border, and margin of the element.line-height
On block level elements, the
line-height property specifies the minimum height of line boxes within the element.margin
The
margin CSS property sets the margin for all four sides. It is a shorthand to avoid setting each side separately with the other margin properties: margin-top, margin-right, margin-bottom and margin-left.margin-bottom
The margin-bottom CSS property of an element sets the margin space required on the bottom of an element. A negative value is also allowed.