How can data be stored inside a ViewModel for further reuse?

To store data within a ViewModel and reuse it, class fields of the ViewModel are usually used, which preserve the state throughout the lifecycle of the associated UI component.

If you need to save data when the process is destroyed (for example, during screen rotation or app closure), you can use SavedStateHandle — a special object that allows saving and restoring state.

Example of using SavedStateHandle:

class MyViewModel(private val state: SavedStateHandle) : ViewModel() {
    var userName: String?
        get() = state.get<String>("userName")
        set(value) = state.set("userName", value)
}

Thus, data is saved and restored automatically, which improves user experience and prevents data loss.