Conditional Views Bad Demonstration

applyIf.swift

//
//  ContentView.swift
//  ConditionalViews
//
//  Created by Michael Long on 5/28/25.
//

import SwiftUI


// per https://www.objc.io/blog/2021/08/24/conditional-view-modifiers/

extension View {
    @ViewBuilder
    func applyIf<M: View>(condition: Bool, transform: (Self) -> M) -> some View {
        if condition {
            transform(self)
        } else {
            self
        }
    }
}

struct ContentView: View {
    @State var counter: Int = 0
    @State var condition: Bool = false
    var body: some View {
        VStack(spacing: 20) {
            Button("Bump counter \(counter)") {
                counter += 1
            }
            Button("Toggle condition \(condition)") {
                condition.toggle()
            }
            idView(counter: counter)
        }
        .padding()
        .applyIf(condition: condition) {
            $0.background(Color.red.opacity(0.15))
        }
    }
}

struct idView: View {
    var counter: Int
    @State var id: UUID = UUID()
    var body: some View {
        VStack {
            Text("\(id)")
            Text("\(counter)")
        }
    }
}

#Preview {
    ContentView()
}