glassEffectUnionId property

String? glassEffectUnionId
final

Optional ID for glass effect union.

When multiple buttons share the same glassEffectUnionId, they will be combined into a single unified Liquid Glass effect. This is useful for creating grouped button effects that appear as one cohesive shape.

Only applies on iOS 26+ and macOS 26+ when using glass styles.

Implementation

final String? glassEffectUnionId;