We can combine all transition-related properties into one line.

transition: <property> <time> <time_function> <delay>;

Let's imagine we need to add a transition property to the element. We expect:

• the change of the background-color property;
• the time duration is 1.2s;
• the time function must be ease-in-out;
• the delay is 250ms.

Long form

transition-property: background-color;
transition-duration: 1200ms;
transition-timing-function: ease-in-out;
transition-delay: 250ms;

Shorthand form

transition: background-color 1200ms ease-in-out 250ms;

Note

There isn't any difference in syntax for the browser. We can select any option we like more.