transition-timing-function:ease

transition-timing-function:linear,transition-delay:300ms

transition-timing-function:ease-in

transition-timing-function:ease-out

transition-timing-function:ease-in-out

transition-timing-function:step-start

transition-timing-function:step-end

transition-timing-function:step(4,start)

transition-timing-function:step(4,end)

transition-timing-function:cubic-bezier(0.1,0.6,0.8,0.9)