![]() This will allow the developer team to spend more time on unit and integration tests of business logic and provide automated verification for the core of the app which is your business logic. With Declarative UIs we can reduce dedicated code to 10–25% of the whole code which is running on a specific platform. ![]() This gives us the possibility to build apps for all platforms, which share 75–90% of the codebase and have the latest native UI/UX in use. This can be the future of (mobile) systems programming. To solve the issue of cross-platform limitations we can consider a new Declarative UI approach and Kotlin Multiplatform as a solution. This causes that still pure native development is the most popular but also not a cheap approach. These technologies allow us to create apps with almost one codebase, but usually, some edge cases or new OS features cannot be easily covered. On the other hand, we have cross-platform or hybrid solutions like Flutter, React Native, Xamarin, Ionic. This usually does not allow the user to use the app in offline mode and it also sometimes provides limitations. Nowadays, to have the best native support, companies build separate apps for each platform (Android, iOS, Web, and Desktop) To limit the amount of code being replicated for each platform, instead of shared code, most apps tend to be ‘ thin client’ and whole business logic is moved to server-side and it is shared via webservices. Separation of concerns: ( UI no longer affects the code and they can be designed independently (still need a common interface to be agreed).Reusable: declarative UIs can be used with a different code (logic) and code can use a different UI and still work.More focus on code: implement behavior and ignore stuff that is not relevant.And based on that we can say that:ĭeclarative UIs build their user interface to reflect the current data/state of your app ![]() That function uses the data to describe the UI by calling UI elements and passes the appropriate data to those elements, and on down the hierarchy. In that case or when new data are available, the app logic provides data to the top-level composable function. The app logic responds to the event, then the composable functions are automatically called again with new parameters, if necessary. In Declarative UIs like Jetpack Compose the user interacted with a UI element, causing an event to be triggered. ![]()
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