WindowSpec.BackgroundOpacity property

Borderless windows only: poll-diffed black background opacity (0 = transparent, 1 = fully black). Applied to the root’s existing click-blocker Image so the background fills the entire window rect and expands when the user resizes height — no separate child GO needed. Null = no background (default).

public Func<float>? BackgroundOpacity { get; set; }

See Also

• record WindowSpec
• namespace Stellar.Abstractions.Domain