This is absolutely incredible. We are now powering a pretty complex web-based feature from our Swift code base. We have been able to share a ton of logic and behavior between different view paradigms and deployment platforms, and it’s all thanks to our dedicated effort to prioritize domain modeling over view-related concerns.

We have been very strict with ourselves to extract as much of the logic and behavior of our features into a dedicated observable model, rather than sprinkling that code throughout the view. And it is now paying off.

But there is one last feature in our CounterModel that we explored for UIKit that we have not yet recreated in our web app. Back when dealing with UIKit we wanted to show how one can bind properties of an observable model to various UI controls, such as steppers and text fields. And we further wanted to show how even focus of text fields could be controlled via state.

Let’s explore what this looks like from the perspective of the web and Wasm.