ViewModifierBuilder

import SwiftUI
import ViewModifierBuilder

struct ContentView: View {

  @State
  private var toggler = false
  
  var body: some View {
    VStack {
      Button("Toggle Modifier") {
        toggler.toggle()
      }
    }
    .modifiers {
      CustomModifier1()
      CustomModifier2()
      if toggler {
        CustomModifier3()
      }
    }
  }
}