Example.swift

import Foundation
import SwiftUI
import PlaygroundSupport

typealias OnClickHandler = (() -> Void)

struct ParentView: View {
    @State var loveEnabled = false
    
    var body: some View {
        VStack {
            ChildView1(loveEnabled: $loveEnabled)
            Spacer()
            ChildView2 {
                // print("We love closures") print crashes my playgrounds
                self.loveEnabled = true
            }
        }
    }
}

struct ChildView1: View {
    @Binding var loveEnabled: Bool
    
    var message: String {
        if loveEnabled {
            return "But in a platonic way"
        } else {
            return "We love closures"
        }
    }
    
    var body: some View {
        Text(message)
    }
}

struct ChildView2: View {
    let callback: OnClickHandler
    
    var body: some View {
        Button(action: callback) {
            Text("Tap me and then just hurt me")
        }
    }
}

PlaygroundPage.current.setLiveView(ParentView())