The CSS @-webkit-keyframes Apple @-rule extension specifies keyframes for CSS visual effect animation properties. This @-rule is followed by the name of the target animation and a set of style rules. You set the animation name using the -webkit-animation-name property. This rule is the last rule encountered in sorted rules order that matches the name of the transition. This rule does not cascade; therefore, an animation never derives keyframes from more than one @-webkit-keyframes rule.