This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The CSSKeyframeRule interface describes an object representing a set of style for a given keyframe. It corresponds to the contains of a single keyframe of a @keyframes at-rule. It implements the CSSRule interface with a type value of 8 (CSSRule.KEYFRAME_RULE).


As a CSSRule, CSSKeyframeRule also implements the properties of these interfaces. It has two specific properties:

Represents the key of the keyframe, like '10%', '75%'. The from keyword maps to '0%' and the to keyword maps to '100%'.
CSSKeyframe.style  Read only
Returns a CSSStyleDeclaration of the CSS style associated with the keyfrom.


As a CSSRule, CSSKeyframeRule also implements the methods of that interface. It has no specific methods.


Specification Status Comment
CSS Animations
The definition of 'CSSKeyframeRule' in that specification.
Working Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes) 5.0 (5.0) -moz
48 (48)
10 12 -o
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support (Yes) 5.0 (5.0) -moz
48 (48)
? ? ?

[1] See the blog post to Opera 12.50.

See also

Document Tags and Contributors

 Contributors to this page: Sebastianz, ttromey, Sheppy, fscholz, teoli, kscarfone
 Last updated by: Sebastianz,