I used to develop web apps using React for a long time and as recently I had to work with IOS Mobile development team inside my company helping to port web application to IOS and I noticed the Apple SwiftUI framework, indeed it is heavily inspired by React.js as data and state driven rendering technique, and it does apply MVVM architecture that i find a very clean approach, therefor I decided to cheat 🙂

So let's first look at simple plain SwiftU implementation of MVVM and see how clean it look

// Model
struct Task {
    var id: UUID = UUID()
    var title: String
    var complete: Bool
}

// ViewModel
class TodoManagerViewModel: ObservableObject
{
    // value publishers (publish change to view state and force view render)
    @Published var tasks: [Task] = []

    func addTask(title: String)
    {
        tasks.append(Task(title: title, complete: false))
    }

    func complete(id: UUID)
    {
        for i in tasks.indices
        {
            if tasks[i].id == id
            {
                tasks[i].complete = true
            }
        }
    }

    func clear()
    {
        tasks.removeAll()
    }
}


struct ContentView: View {
    // Observe ModelView and request render
    // if any @Published variables changed
    @StateObject var todoManger = TodoManagerViewModel()



    var body: some View {
        // Render logic same as
        // React Components composition style
        return AnyView()
    }
}

and by compiling this code we get this app

So the key design points is:

• ViewModel with @Published properties
• attach the ViewModel to the View to receive published changes.

Now let us construct the same design using Reactjs

I built this typescript module to help us construct a ViewModel and publish it state .

react-mvvm-like

now let us see how we can build MVVM react TodoManager application with this module the same way as Apple SwiftUI do.

1) install react-mvvm-like

2) creating Task Model with autoDoneAfter property so task gonna flip to done after a few seconds if not done by user.

3) construct the ViewModel class extending ObservableObject
and define published properties

4) receive the changes inside React Component.

thats it, we are done, please check full example below:

If you have any feedback on this article, please let me know!