transition

The transition CSS property is a shorthand property for transition-property, transition-duration, transition-timing-function, and transition-delay. It enables you to define the transition between two states of an element. Different states may be defined using pseudo-classes like :hover or :active or dynamically set using JavaScript.

Initial value	as each of the properties of the shorthand: transition-delay: 0s transition-duration: 0s transition-property: all transition-timing-function: ease
Applies to	all elements, ::before and ::after pseudo-elements
Inherited	no
Media	interactive
Computed value	as each of the properties of the shorthand: transition-delay: as specified transition-duration: as specified transition-property: as specified transition-timing-function: as specified
Animation type	discrete
Canonical order	order of appearance in the formal grammar of the values

Syntax

/* Apply to 1 property */
/* property name | duration */
transition: margin-left 4s;

/* property name | duration | delay */
transition: margin-left 4s 1s;

/* property name | duration | timing function | delay */
transition: margin-left 4s ease-in-out 1s;

/* Apply to 2 properties */
transition: margin-left 4s, color 1s;

/* Apply to all changed properties */
transition: all 0.5s ease-out;

/* Global values */
transition: inherit;
transition: initial;
transition: unset;

Note that order is important within the items in this property: the first value that can be parsed as a time is assigned to the transition-duration, and the second value that can be parsed as a time is assigned to transition-delay.

See how things are handled when lists of property values aren't the same length. In short, extra transition descriptions beyond the number of properties actually being animated are ignored.

Formal syntax

<single-transition>#
where 
<single-transition> = [ none | <single-transition-property> ] || <time> || <single-transition-timing-function> || <time>
where 
<single-transition-property> = all | <custom-ident>
<single-transition-timing-function> = ease | linear | ease-in | ease-out | ease-in-out | step-start | step-end | steps( <integer> [, [ start | end ] ]? ) | cubic-bezier( <number>, <number>, <number>, <number> )

Examples

There are several more examples of CSS transitions included in the main CSS transitions article.

Specifications

Specification	Status	Comment
CSS Transitions The definition of 'transition' in that specification.	Working Draft	Initial definition

Browser compatibility

[1] In addition to the unprefixed support, Gecko 44.0 (Firefox 44.0 / Thunderbird 44.0 / SeaMonkey 2.41) added support for a -webkit prefixed version of the property for web compatibility reasons behind the preference layout.css.prefixes.webkit, defaulting to false. Since Gecko 49.0 (Firefox 49.0 / Thunderbird 49.0 / SeaMonkey 2.46) the preference defaults to true.

[2] PPK test

See also

• Using CSS transitions
• TransitionEvent