IsVisibleModifier.swift

import SwiftUI

struct IsVisibleModifier: ViewModifier {
    @Binding var isVisible: Bool

    func body(content: Content) -> some View {
        content
            .onAppear {
                self.isVisible = true
            }
            .onDisappear {
                self.isVisible = false
            }
    }
}

extension View {
    public func isVisible(_ isVisible: Binding<Bool>) -> some View {
        return self.modifier(IsVisibleModifier(isVisible: isVisible))
    }
}