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CSS Animations

CSS Animations is a module of CSS that lets you animate the values of CSS properties over time, using keyframes. The behavior of these keyframe animations can be controlled by specifying their timing function, duration, their number of repetitions, and other attributes.

Reference

CSS Properties

CSS At-rules

@keyframes

Guides

Detecting CSS animation support: Describes a technique for detecting if a browser supports CSS animations.
Using CSS animations: Step-by-step tutorial about how to create animations using CSS. This article describes each relevant CSS property and at-rule and explains how they interact with each other.
CSS animations tips and tricks: Tips and tricks to help you get the most out of CSS animations. Currently offers a technique for replaying an animation which has already run through to completion, which the API doesn't support inherently.

Specifications

Specification	Status	Comment
CSS Animations	Working Draft	Initial definition.

Browser compatibility

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	(Yes)-webkit 43.0	(Yes)	5.0 (5.0)-moz 16.0 (16.0)	10	12-o 12.10^[2]	4.0-webkit

Feature	Android	Edge	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
Basic support	2.1 -webkit [1] 4.0 -webkit	(Yes)	5.0 (5.0)-moz 16.0 (16.0)	?	?	(Yes)-webkit

[1] Partial support: animation-fill-mode property is not supported in Android browser below 2.3.

[2] See the release notes to Opera 12.50.