indicatorExpansion property

EdgeInsetsGeometry indicatorExpansion
final

How far the jelly indicator's leading and trailing edges expand past the tab boundary as the indicator translates between tabs. Higher values give a more dramatic "puff" stretch; lower values a tighter, more iOS-native feel.

Defaults to EdgeInsets.symmetric(horizontal: 12, vertical: 8) which matches the iOS 26 bottom-bar pill proportions (slightly wider than tall). To restore the previous symmetric behaviour pass indicatorExpansion: const EdgeInsets.all(8.0).

Implementation

final EdgeInsetsGeometry indicatorExpansion;