This class contains a series of function definitions used to modify values during an animation. They describe how the intermediate values used during a transition will be calculated. It allows for a transition to change speed over its duration. The following options are available:
Note that cubic-bezier will create a custom easing curve following the CSS3 transition-timing-function specification http://www.w3.org/TR/css3-transitions/.transition-timing-function_tag. The four values specify points P1 and P2 of the curve
as (x1, y1, x2, y2). All values must be in the range [0, 1] or the definition is invalid.