Can I pass down a

MutableState

into a

@Composable

function, and use

var value by mutableState

at the outer function and expect a recomposition once the inner function changes

MutableState

?

If I understand correctly what you want to achieve, yes you can. In fact some use cases may only be achieved using that approach

don't forget to

remember

Do not pass down

MutableState

down to your composables. https://kotlinlang.slack.com/archives/CJLTWPH7S/p1644852692627449?thread_ts=1644783454.508379&cid=CJLTWPH7S

I don’t get why you should pass the lambda, why not just receive the

SomeData

object directly?

Only if you need to defer the state read to a scope further down in your composable tree. It’s an optimization to reduce recompositions. 99% of the time you don’t need it. Sometimes however it is a good idea.

Didn't need it after all, but thanks for the info, will keep in mind.

yeah I think I get it now, as long as the function is not re-created when whatever it is used inside to give the state changes, you will need to be careful with that, is not just “replacing X with Y” 🤔. Otherwise it will be the same as sending the State directly