【SwiftUI】shadow() with compositingGroup() 👉 https://android.benigumo.com/20240424/shadow-effect/

TestShadow.swift

import SwiftUI

struct TestShadow: View {
  var body: some View {
    VStack {
      Text("こちらへ")
      Text("▶")
    }
    .padding()
    .background(.yellow)

//    .contentShape(.rect) // NG
//    .clipShape(.rect) // OK
//    .clipped() // OK
    .compositingGroup() // OK

    .shadow(color: .secondary, radius: 2, x: 5, y: 5) // *
//    .opacity(0.5) // always
//    .foregroundStyle(.red) // always
//    .scaleEffect(2) // always

  }
}

#Preview("TestShadow") {
  TestShadow()
}