Interface IStaggerCustomEasingOptions

constant	accelerate	decelerate	accelerate-decelerate	decelerate-accelerate
linear	ease-in / in	ease-out / out	ease-in-out / in-out	ease-out-in / out-in
ease	in-sine	out-sine	in-out-sine	out-in-sine
steps	in-quad	out-quad	in-out-quad	out-in-quad
step-start	in-cubic	out-cubic	in-out-cubic	out-in-cubic
step-end	in-quart	out-quart	in-out-quart	out-in-quart
	in-quint	out-quint	in-out-quint	out-in-quint
	in-expo	out-expo	in-out-expo	out-in-expo
	in-circ	out-circ	in-out-circ	out-in-circ
	in-back	out-back	in-out-back	out-in-back
	in-bounce	out-bounce	in-out-bounce	out-in-bounce
	in-elastic	out-elastic	in-out-elastic	out-in-elastic
	spring / spring-in	spring-out	spring-in-out	spring-out-in

All Elastic easing's can be configured using theses parameters,

*-elastic(amplitude, period)

Each parameter comes with these defaults

Parameter	Default Value
amplitude	1
period	0.5

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All Spring easing's can be configured using theses parameters,

spring-*(mass, stiffness, damping, velocity)

Each parameter comes with these defaults

Parameter	Default Value
mass	1
stiffness	100
damping	10
velocity	0

You can create your own custom cubic-bezier easing curves. Similar to css you type cubic-bezier(...) with 4 numbers representing the shape of the bezier curve, for example, cubic-bezier(0.47, 0, 0.745, 0.715) this is the bezier curve for in-sine.

Note: the easing property supports the original values and functions for easing as well, for example, steps(1), and etc... are supported.

Note: you can also use camelCase when defining easing functions, e.g. inOutCubic to represent in-out-cubic