CSS transition property


CSS transition is a shorthand property of transition-property, transition-duration, transition-timing-function, and transition-delay.

We take an example of a box that rotates by 270 degree on mouse hover within duration of 4s but with different values of transition-delay.


transition : none | [ transition-property    transition-duration    transition-timing-function    transition-delay ]

Property values



transition starts its execution as soon as it starts.

transition-property: width;


+ve value (seconds)Default

It determnines the duration of transition. transition occurs instantly for 0s.

transition-duration: 0s;

+ve value (seconds)

transition-duration also accepts fractional values. Change in the property value occurs within 2.5s.

transition-duration: 2.5s;

+ve value (milliseconds)

time in milliseconds may also be used as the value. 2000ms means 2s.

transition-duration: 2000ms;



The speed of transition is constant over its duration. It represents normal behavior over the transition-duration.

transition-timing-function: ease;


The speed is slow at the start of transition i.e. It represents somooth behavior at the start only.

transition-timing-function: ease-in;


The speed is fast at the start of transition i.e. The transition is smooth at the end.

transition-timing-function: ease-out;


The speed of transition is slow at the start and end of transition-duration as compared to intermediate time. It represents smooth behavior at the start and end of the transition.

transition-timing-function: ease-in-out;


+ve value (seconds)Default

transition-delay accepts value in seconds. 0s means the transition starts its execution as soon as it starts.

transition-delay: 0s;

+ve value (seconds)

transition-delay also accepts fractional values. 2.5s means the transition starts execution after 2.5 seconds when it is applied.

transition-delay: 2.5s;

+ve value (milliseconds)

value in milliseconds may also be used. 2000ms means 2s. Wait for 2000ms to see the execution of transition.

transition-delay: 2000ms;

-ve value (seconds)

It starts execution partway through its life cycle. If the transition-duration is 3s and transition-delay is -2s, it shows a part of cycle that remains after subtracting transition-delay from transition-duration (1s).

transition-delay: -2s;

Applicable to

It applies to all elements

#CSS digger
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hover over me and wait for the change to occur with a delay