?? Why is Smart UI a Problem?

When your UI manages business logic, you run into these issues:

1?? Hard to test: UI testing is tricky, time-consuming, and less reliable.

2?? Tight coupling: The UI gets directly linked to APIs or data sources.

3?? Difficult to maintain: Changes to logic might break the UI, and scaling becomes harder.

? Here’s an example of what not to do:

?? What’s wrong?

1?? The UI directly depends on UserApi, breaking separation of concerns.

2?? The UI handles fetching data (api.getUserProfile()), which isn’t its job.

3?? Logic like api.followUser() is embedded in the UI, making it harder to test.

? Here’s how to fix it with a "dumb UI" approach:

?? Benefits of a Dumb UI:

1?? Separation of Concerns: The UI only displays data, leaving logic to the ViewModel.

2?? Improved Testability: You can easily test the ViewModel in isolation, while UI testing focuses on layout and visuals.

3?? Scalability: Changes to business logic don’t affect the UI, making your code easier to scale and maintain.