Abakada: Back to Basics > Language References > CSS Properties > Transition Properties > transition-timing-function Property

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Specifies the speed curve of the transition effect.

CSS	{ transition-timing-function: linear | ease | ease-in | ease-out | ease-in-out | step-start | step-end | steps(int,start | end) | cubic-bezier(n,n,n,n) }
Script	object.style.transitionTimingFunction = linear | ease | ease-in | ease-out | ease-in-out | step-start | step-end | steps(int,start | end) | cubic-bezier(n,n,n,n)

Parameter	Description	Valid Values
linear	Specifies a transition effect with the same speed from start to end (equivalent to cubic-bezier(0,0,1,1))
ease	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))
ease-in	Specifies a transition effect with a slow start (equivalent to cubic-bezier(0.42,0,1,1))
ease-out	Specifies a transition effect with a slow end (equivalent to cubic-bezier(0,0,0.58,1))
ease-in-out	Specifies a transition effect with a slow start and end (equivalent to cubic-bezier(0.42,0,0.58,1))
step-start	Equivalent to steps(1, start)
step-end	Equivalent to steps(1, end)
steps(int,start|end)	Specifies a stepping function, with two parameters. The first parameter specifies the number of intervals in the function.	It must be a positive integer (greater than 0). The second parameter, which is optional, is either the value "start" or "end", and specifies the point at which the change of values occur within the interval. If the second parameter is omitted, it is given the value "end"
cubic-bezier(n,n,n,n)	Define your own values in the cubic-bezier function. Possible values are numeric values from 0 to 1

The property is read/write with a default value of ease; this attribute is not inherited.

The transition-timing-function property describes how the intermediate values used during a transition will be calculated.

It allows for a transition to change speed over its duration. These effects are commonly called easing functions.

NOTE: This section is currently under major reconstruction. Please bear with whatever inconvenience you may encounter; we hope to complete the job at the soonest possible time.

For a brief overview, please see Understanding and Using CSS Transitions.

transition, transition-property, transition-duration, transition-delay, transition-behavior