Represents an animation curve type.
Default value. Specifies a transition effect with a slow start, then fast, then end slowly (equivalent to cubic-bezier(0.25,0.1,0.25,1))
An ease-in curve causes the animation to begin slowly, and then speed up as it progresses.
An ease-in ease-out curve causes the animation to begin slowly, accelerate through the middle of its duration, and then slow again before completing.
An ease-out curve causes the animation to begin quickly, and then slow down as it completes.
A linear animation curve causes an animation to occur evenly over its duration.
A spring animation curve causes an animation to produce a spring (bounce) effect.
A custom cubic bezier function defined by its two control points. Possible values are numeric values from 0 to 1