CSS logical properties and values
The CSS logical properties and values module introduces logical properties and values that provide the ability to control layout through logical, rather than physical, direction and dimension mappings.
The module also defines logical properties and values for properties previously defined in CSS 2.1. Logical properties define direction‐relative equivalents of their corresponding physical properties.
Block vs. inline
Logical properties and values use the abstract terms block and inline to describe the direction in which they flow. The physical meaning of these terms depends on the writing mode.
- Block dimension
-
The dimension perpendicular to the flow of text within a line, i.e., the vertical dimension in horizontal writing modes, and the horizontal dimension in vertical writing modes. For standard English text, it is the vertical dimension.
- Inline dimension
-
The dimension parallel to the flow of text within a line, i.e., the horizontal dimension in horizontal writing modes, and the vertical dimension in vertical writing modes. For standard English text, it is the horizontal dimension.
New properties and values
CSS was initially designed with only physical coordinates in its controls. The module defines new flow–relative equivalents for many values and properties.
Some physical properties now have logical equivalents. Properties that accept physical values (top
, bottom
, left
, right
) now also accept flow-relative logical values (block-start
, block-end
, inline-start
, inline-end
).
The transition to logical axes is ongoing and not fully defined by the module; some properties don't yet have logical equivalents.
Reference
Properties for sizing
Properties for margins
Properties for paddings
Properties for borders
border-block
border-block-color
border-block-end
border-block-end-color
border-block-end-style
border-block-end-width
border-block-start
border-block-start-color
border-block-start-style
border-block-start-width
border-block-style
border-block-width
border-color
border-inline
border-inline-color
border-inline-end
border-inline-end-color
border-inline-end-style
border-inline-end-width
border-inline-start
border-inline-start-color
border-inline-start-style
border-inline-start-width
border-inline-style
border-inline-width
border-style
border-width
Properties for border radius
Properties for positioning
Properties for size containment
Properties for scrolling
Properties for floating
Other properties
caption-side
(inline-end
andinline-start
keywords)resize
(block
andinline
keywords)text-align
(end
andstart
keywords)
Deprecated properties
offset-block-end
(nowinset-block-end
)offset-block-start
(nowinset-block-start
)offset-inline-end
(nowinset-inline-end
)offset-inline-start
(nowinset-inline-start
)
Unsupported properties
The following properties don't have logical equivalents:
Unsupported values
The following properties accept only physical values:
Guides
Specifications
Specification |
---|
CSS Logical Properties and Values Level 1 |
Browser compatibility
See the individual property pages for full compatibility information.