Definition and Usage
The <time> CSS data type denotes time dimensions expressed in seconds or milliseconds. They consists of a <number> immediately followed by the unit. Like for any CSS dimension, there is no space between the unit literal and the number.
The following units may be used :
- s which represents a time in seconds. E.g. 0s, 1.5s, -60s.
- ms which represents a time in milliseconds. E.g. 0ms, 1500ms, -60000ms.
Conversion between s and ms follows the logical 1s = 1000ms.
Even if all units represent the same time for the value 0, the unit may not be omitted in that case as it isn't a <length>: 0 is invalid and does not represent 0s, 0ms.
Examples
These are valid time values:
12s Positive integer -456ms Negative integer 4.3ms Non-integer 14mS The unit is case-insensitive, though capital letters are not recommended for s and ms. +0s Zero, with a leading + and the unit -0ms Zero, with a leading - and the unit (Though strange, this is an allowed value)
These are invalid time values:
0 While unitless zero is allowed for <length>, it's invalid for all other units. 12.0 This is a <number>, not a <time>, it must have a unit 7 ms No space is allowed between the <number> and the unit
Compatibility
Desktop browsers
| Feature | Chrome (Webkit) | Firefox (Gecko) | Internet Explorer | Opera (Presto) | Safari (Webkit) |
|---|---|---|---|---|---|
| Basic support | <=11 (?) | 4.0 (2.0) | 9.0 | 10.5 (2.3) | <=3.2 (?) |
Mobile browsers
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | NA | NA | NA | Not supported | NA |
