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kotlinlang

Hey there, can smbd please explain me, what’s the purpose of `state {…}`? Is it smth that’s used to control the state of the UI? If possible with an example, pls.
AFAIK, the source of truth for the UI should be a model class (Model annotated class). Correct me if I’m wrong here.

It's an alias for
```remember { mutableStateOf(...) }```


`mutableStateOf&lt;T&gt;(initialValue)` returns a `MutableState&lt;T&gt;`, which also implements the read-only interface `State&lt;T&gt;`. The returned implementation is backed by the same `@Model` infrastructure, so changing its `.value` property has the same effect as changing a property of a `@Model` class

it also supports property delegation, so you can write
```var myState by state { 0 }```
and simply reference `myState` as an `Int` var that will be observed by the composition when it changes

it's useful when you don't need a whole new class or type as a holder of mutable state

oh I see, that clears it out for me. I wasn’t sure if I have to create Model class for every state of my component. Thanks :+1:

nope! That would be kind of a pain, and `MutableState&lt;T&gt;` would be one of the first things you'd write to avoid having to do that all over, so it's built-in :slightly_smiling_face:

exactly :smile: thanks for the clarification!

Definitely check out state hoisting patterns though, a bunch of private state in your composables can start to get a bit difficult to work with as your app grows.