CSS transition-duration Property Reference

The CSS transition-duration property is a standard property in CSS Transitions. Review its formal syntax, computed behavior, and practical declarations.

Updated 2026-08-12

transition-duration overview

The CSS transition-duration property is a standard property in CSS Transitions. Review its formal syntax, computed behavior, and practical declarations.

The property is not inherited by default. Use an explicit global keyword when inheritance is intended.

Syntax and formal definition

transition-duration formal syntax

Field	Value
Formal syntax	<time>#
Initial value	0s
Applies to	allElementsAndPseudos
Inherited	No
Percentages	no
Computed value	asSpecified
Animation type	notAnimatable
Media	interactive
Specification group	CSS Transitions
Status	Standard

Practical examples

These declarations demonstrate valid ways to set transition-duration. The initial and inherit global keywords remain available even when a property-specific value is preferable.

transition-duration live example

CSS

.reset-example {
  transition-duration: initial;
}

.inherit-example {
  transition-duration: inherit;
}

@supports (transition-duration: initial) {
  .supported {
    transition-duration: initial;
  }
}