Definition and Usage
The <ratio> CSS data type, used for describing aspect ratios in media queries, denotes the proportion between two unitless values. It is a strictly positive <integer> followed by a slash ('/', Unicode U+002F SOLIDUS) and a second strictly positive <integer>. There may be spaces before and after the solidus.
Examples
| Ratio | Usage |
|---|---|
| 4/3 | Traditional TV format in the 20th century. |
| 16/9 | Modern, 'widescreen', TV format. |
| 185/100 = 91/50(non-integer dividends and divisors are not allowed) | The most common movie format since the 1960s. |
| 239/100(non-integer dividends and divisors are not allowed) | The 'widescreen', anamorphic, movie format. |
Compatibility
Desktop browsers
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | <4 | 3.5 (1.9.1) | 9 | 9.5 | 1.0 (?) |
Mobile browsers
| Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | yes | yes | ? | yes | yes |
