CSS timeline-scope Property Reference

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

Updated 2026-08-12

timeline-scope overview

The CSS timeline-scope 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

timeline-scope formal syntax

Field	Value
Formal syntax	none \| <dashed-ident>#
Initial value	none
Applies to	allElements
Inherited	No
Percentages	no
Computed value	noneOrOrderedListOfIdentifiers
Animation type	notAnimatable
Media	interactive
Specification group	Scroll-driven Animations
Status	Experimental

Practical examples

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

timeline-scope live example

CSS

.reset-example {
  timeline-scope: initial;
}

.inherit-example {
  timeline-scope: inherit;
}

@supports (timeline-scope: initial) {
  .supported {
    timeline-scope: initial;
  }
}