<ratio>
The <ratio>
CSS data type, used for describing aspect ratios in media queries, denotes the proportion between two unitless values.
Syntax
In Media Queries Level 3, the <ratio>
data type consisted of a strictly positive <integer>
followed by a forward slash ('/', Unicode U+002F SOLIDUS
) and a second strictly positive <integer>
. Spaces before and after the slash are optional. The first number represents the width, while the second represents the height.
In Media Queries Level 4, the <ratio>
date type is updated to consist of a strictly positive <number>
followed by a forward slash ('/', Unicode U+002F SOLIDUS
) and a second strictly positive <number>
. In addition a single <number>
as a value is allowable.
Formal syntax
<ratio> =
<number [0,∞]> [ / <number [0,∞]> ]?
Examples
Use in a media query
css
@media screen and (min-aspect-ratio: 16/9) {
/* … */
}
Common aspect ratios
Ratio | Usage | |
---|---|---|
4/3 |
Traditional TV format in the twentieth century. | |
16/9 |
Modern "widescreen" TV format. | |
185/100 = 91/50 |
The most common movie format since the 1960s. | |
239/100 |
"Widescreen," anamorphic movie format. |
Specifications
Specification |
---|
Media Queries Level 4 # values |
Browser compatibility
BCD tables only load in the browser
See also
aspect-ratio
media feature