: Optional. List. For animation you can define the duration (in milliseconds) and easing function manually.
Available are: linear, easeInQuad, easeOutQuad, easeInOutQuad, easeInCubic, easeOutCubic, easeInOutCubic, easeInQuart, easeOutQuart, easeInOutQuart, easeInQuint, easeOutQuint, easeInOutQuint.
Default to list(duration = 1500, easingFunction = "easeInOutQuad")