CSS animation-range-start Property Reference

The CSS animation-range-start property is a experimental property in Scroll-driven Animations. Review its formal syntax, computed behavior, and practical declarations.

Updated 2026-08-12

animation-range-start overview

The CSS animation-range-start property is a experimental property in Scroll-driven Animations. 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

animation-range-start formal syntax

Field	Value
Formal syntax	[ normal \| <length-percentage> \| <timeline-range-name> <length-percentage>? ]#
Initial value	normal
Applies to	allElements
Inherited	No
Percentages	relativeToTimelineRangeIfSpecifiedOtherwiseEntireTimeline
Computed value	listEachItemConsistingOfNormalLengthPercentageOrNameLengthPercentage
Animation type	notAnimatable
Media	visual
Specification group	Scroll-driven Animations
Status	Experimental

Practical examples

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

animation-range-start live example

CSS

.reset-example {
  animation-range-start: initial;
}

.inherit-example {
  animation-range-start: inherit;
}

@supports (animation-range-start: initial) {
  .supported {
    animation-range-start: initial;
  }
}