<time>

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The <time> CSS data type represents a time value expressed in seconds or milliseconds. It is used in animation, transition, and related properties.

Syntax

The <time> data type consists of a​ ​​​​​​<number> followed by one of the units listed below. Optionally, it may be preceded by a single + or - sign. As with all dimensions, there is no space between the unit literal and the number.

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 0s or 0ms.

Units

s
Represents a time in seconds. Examples: 0s, 1.5s, -60s.
ms
Represents a time in milliseconds. Examples: 0ms, 150.25ms, -60000ms.

Note: Conversion between s and ms follows the logical 1s = 1000ms.

Examples

Valid times

12s         Positive integer
-456ms      Negative integer
4.3ms       Non-integer
14mS        The unit is case-insensitive, although capital letters are not recommended.
+0s         Zero with a leading + and a unit
-0ms        Zero with a leading - and a unit

Invalid times

0           Although unitless zero is allowed for <length>s, it's invalid for <time>s.
12.0        This is a <number>, not a <time>, because it's missing a unit.
7 ms        No space is allowed between the number and the unit.

Specifications

Specification Status Comment
CSS Values and Units Module Level 4
The definition of '<time>' in that specification.
Editor's Draft  
CSS Values and Units Module Level 3
The definition of '<time>' in that specification.
Candidate Recommendation Normative definition of s and ms.
CSS Level 2 (Revision 1)
The definition of '<time>' in that specification.
Recommendation Informal definition of s and ms.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
<time>Chrome Full support 1Edge Full support 12Firefox Full support 4IE Full support 9Opera Full support 10.1Safari Full support 3.1WebView Android Full support 2Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 2Samsung Internet Android Full support 1.0

Legend

Full support  
Full support