indicatorExpansion property

EdgeInsetsGeometry indicatorExpansion
final

Expansion padding applied to the active indicator pill during interaction.

The pill grows by this amount beyond its cell boundary as the user drags, creating the iOS 26 "jelly" overshoot. Defaults to EdgeInsets.symmetric(horizontal: 12, vertical: 8) for a consistent look across all indicator widgets.

Implementation

final EdgeInsetsGeometry indicatorExpansion;