SwiftUI - Conditional view modifiers

SwiftUI - conditions

struct SwiftUIView: View {
    var condition1: Bool = true
    var condition2: Bool = false
    var customColor: Color?

    var body: some View {
        Text("Hello, World!")
            .ifLet(customColor) { $0.foregroundColor($1) }
            .if(condition1) { $0.padding(16) }
            .if(condition2) { $0.hidden() }
            .if(condition1, if: { $0.padding(8) }, else: { $0.padding(16) })
    }
}

struct SwiftUIView_Previews: PreviewProvider {
    static var previews: some View {
        SwiftUIView()
    }
}

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

    @ViewBuilder
    func `if`<TrueContent: View, FalseContent: View>(
        _ condition: Bool,
        if ifTransform: (Self) -> TrueContent,
        else elseTransform: (Self) -> FalseContent
    ) -> some View {
        if condition {
            ifTransform(self)
        } else {
            elseTransform(self)
        }
    }

    @ViewBuilder
    func ifLet<V, Transform: View>(
        _ value: V?,
        transform: (Self, V) -> Transform
    ) -> some View {
        if let value = value {
            transform(self, value)
        } else {
            self
        }
    }

    @ViewBuilder
    func ignoreKeyboard() -> some View {
        if #available(iOS 14.0, *) {
            ignoresSafeArea(.keyboard)
        } else {
            self // iOS 13 always ignores the keyboard
        }
    }

    @ViewBuilder
    func insetGroupedListStyle() -> some View {
        if #available(iOS 14.0, *) {
            self.listStyle(InsetGroupedListStyle())
        } else {
            self
                .listStyle(GroupedListStyle())
                .environment(\.horizontalSizeClass, .regular)
        }
    }
}