Can anyone tell me what scenarios `rememberUpdatedState` applies to? I saw `rememberUpdatedState` is...

# compose

[Chachako]

Can anyone tell me what scenarios rememberUpdatedState applies to? I saw rememberUpdatedState is used in Compose Dialog to remember content, but I still can’t understand what describes in kdoc. Could someone please explain it to me. I am grateful.

[Albert Chang]

I think the doc is quite easy to understand. Basically it's used to create a value holder which always holds the latest value. If you still don't understand, reading the source of rememberUpdatedState may help.

@Composable
fun <T> rememberUpdatedState(newValue: T): State<T> = remember {
    mutableStateOf(newValue)
}.apply { value = newValue }

[Albert Chang]

As for the reason why it's used in Dialog, I believe it's that the content lambda is executed in another setContent call, which means that the content will not be correctly updated if recomposition is not explicitly triggered by the State.

[Chachako]

Thanks