<resolution>
The <resolution>
CSS data type, used for describing resolutions in media queries, denotes the pixel density of an output device, i.e., its resolution.
On screens, the units are related to CSS inches, centimeters, or pixels, not physical values.
Syntax
The <resolution>
data type consists of a strictly positive <number>
followed by one of the units listed below. As with all CSS dimensions, there is no space between the unit literal and the number.
Units
dpi
-
Represents the number of dots per inch. Screens typically contains 72 or 96 dots per inch, but the dpi for printed documents is usually much greater. As 1 inch is 2.54 cm,
1dpi ≈ 0.39dpcm
. dpcm
-
Represents the number of dots per centimeter. As 1 inch is 2.54 cm,
1dpcm ≈ 2.54dpi
. dppx
-
Represents the number of dots per
px
unit. Due to the 1:96 fixed ratio of CSSin
to CSSpx
,1dppx
is equivalent to96dpi
, which corresponds to the default resolution of images displayed in CSS as defined byimage-resolution
. x
-
Alias for
dppx
.
Note: Although the number 0
is always the same regardless of unit, the unit may not be omitted. In other words, 0
is invalid and does not represent 0dpi
, 0dpcm
, or 0dppx
.
Examples
Use in a media query
css
@media print and (min-resolution: 300dpi) {
/* … */
}
Valid resolutions
96dpi 50.82dpcm 3dppx
Invalid resolutions
72 dpi Spaces are not allowed between the number and the unit. ten dpi The number must use digits only. 0 The unit is required.
Specifications
Specification |
---|
CSS Values and Units Module Level 4 # resolution |
Browser compatibility
BCD tables only load in the browser
See also
- resolution media feature
- The
image-resolution
property - Using @media queries