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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The CSSKeyframesRule interface describes an object representing a complete set of keyframes for a CSS animation. It corresponds to the contents of a whole @keyframes at-rule. It implements the CSSRule interface with a type value of 7 (CSSRule.KEYFRAMES_RULE).

Properties

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

CSSKeyframesRule.name
Represents the name of the animation, used by the animation-name property.
CSSKeyframesRule.cssRules Read only
Returns a CSSRuleList of the CSS rules in the media rule.

Methods

As a CSSRule, CSSKeyframesRule also implements the methods of that interface. It has three specific methods:

CSSKeyframesRule.appendRule()
Inserts a new keyframe rule into the current CSSKeyframesRule. The parameter is a DOMString containing a keyframe in the same format as an entry of a @keyframes at-rule. If it contains more than one keyframe rule, a DOMException with a SYNTAX_ERR is thrown.
CSSKeyframesRule.deleteRule()
Deletes a keyframe rule from the current CSSKeyframesRule. The parameter is the index of the keyframe to be deleted, expressed as a DOMString resolving as a number between 0% and 100%.
CSSKeyframesRule.findRule()
Returns a keyframe rule corresponding to the given key. The key is a DOMString containing an index of the keyframe to be returned, resolving to a percentage between 0% and 100%. If no such keyframe exists, findRule returns null.

Specification

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
CSSKeyframesRule
Experimental
Chrome Full support 31
Full support 31
No support 1 — 31
Prefixed
Prefixed Implemented with the vendor prefix: WebKit
Edge Full support 12Firefox Full support 48
Full support 48
No support 5 — 48
Prefixed
Prefixed Implemented with the vendor prefix: Moz
IE Full support 10Opera Full support 18
Full support 18
No support 15 — 18
Prefixed
Prefixed Implemented with the vendor prefix: WebKit
No support 12.1 — 15
No support 12 — 12.1
Prefixed
Prefixed Implemented with the vendor prefix: O
Safari Full support 9.1
Full support 9.1
No support 4 — 9.1
Prefixed
Prefixed Implemented with the vendor prefix: WebKit
WebView Android Full support 4.4.3
Full support 4.4.3
No support 1 — 4.4.3
Prefixed
Prefixed Implemented with the vendor prefix: WebKit
Chrome Android Full support 31
Full support 31
No support 18 — 31
Prefixed
Prefixed Implemented with the vendor prefix: WebKit
Firefox Android Full support 48
Full support 48
No support 5 — 48
Prefixed
Prefixed Implemented with the vendor prefix: Moz
Opera Android Full support 18
Full support 18
No support 14 — 18
Prefixed
Prefixed Implemented with the vendor prefix: WebKit
No support 12.1 — 14
No support 12 — 12.1
Prefixed
Prefixed Implemented with the vendor prefix: O
Safari iOS Full support 9.3
Full support 9.3
No support 3.2 — 9.3
Prefixed
Prefixed Implemented with the vendor prefix: WebKit
Samsung Internet Android Full support 2.0
Full support 2.0
No support 1.0 — 2.0
Prefixed
Prefixed Implemented with the vendor prefix: WebKit
appendRule
Experimental
Chrome Full support 41
Full support 41
No support 1 — 45
Alternate Name
Alternate Name Uses the non-standard name: insertRule
Edge Full support 12Firefox Full support 22
Full support 22
No support 5 — 22
Alternate Name
Alternate Name Uses the non-standard name: insertRule
IE Full support 10Opera Full support 28
Full support 28
No support 15 — 31
Alternate Name
Alternate Name Uses the non-standard name: insertRule
No support 12 — 15
Safari Full support 9.1
Full support 9.1
Full support 4
Alternate Name
Alternate Name Uses the non-standard name: insertRule
WebView Android Full support 41
Full support 41
No support 1 — 45
Alternate Name
Alternate Name Uses the non-standard name: insertRule
Chrome Android Full support 41
Full support 41
No support 18 — 45
Alternate Name
Alternate Name Uses the non-standard name: insertRule
Firefox Android Full support 22
Full support 22
No support 5 — 22
Alternate Name
Alternate Name Uses the non-standard name: insertRule
Opera Android Full support 28
Full support 28
No support 14 — 32
Alternate Name
Alternate Name Uses the non-standard name: insertRule
No support 12 — 14
Safari iOS Full support 9.3
Full support 9.3
Full support 3.2
Alternate Name
Alternate Name Uses the non-standard name: insertRule
Samsung Internet Android Full support 4.0
Full support 4.0
No support 1.0 — 5.0
Alternate Name
Alternate Name Uses the non-standard name: insertRule
cssRules
Experimental
Chrome Full support 44Edge Full support 12Firefox Full support 5IE Full support 10Opera Full support 31Safari Full support 9.1WebView Android Full support 44Chrome Android Full support 44Firefox Android Full support 5Opera Android Full support 32Safari iOS Full support 9.3Samsung Internet Android Full support 4.0
deleteRule
Experimental
Chrome Full support 1Edge Full support 12Firefox Full support 5IE Full support 10Opera Full support 12Safari Full support 4WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 5Opera Android Full support 12Safari iOS Full support 3.2Samsung Internet Android Full support 1.0
findRule
Experimental
Chrome Full support 1Edge Full support 12Firefox Full support 5IE Full support 10Opera Full support 12Safari Full support 4WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 5Opera Android Full support 12Safari iOS Full support 3.2Samsung Internet Android Full support 1.0
name
Experimental
Chrome Full support 44Edge Full support 12Firefox Full support 5IE Full support 10Opera Full support 31Safari Full support 9.1WebView Android Full support 44Chrome Android Full support 44Firefox Android Full support 5Opera Android Full support 32Safari iOS Full support 9.3Samsung Internet Android Full support 4.0

Legend

Full support  
Full support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
Uses a non-standard name.
Uses a non-standard name.
Requires a vendor prefix or different name for use.
Requires a vendor prefix or different name for use.

See also

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