i have a LazyColumn with a VerticalScrollbar. how can i know if the vertical scrollbar is at the bot...

# compose-desktop

[Zoff]

i have a LazyColumn with a VerticalScrollbar. how can i know if the vertical scrollbar is at the bottom position?
so that in my chat messages view it will only scoll to bottom on new incoming message when it was at the bottom.
but when the user scrolls somewhere it should not automatically scroll to bottom on a new message incoming

[Stefan Oltmann]

LazyListState has a canScrollForward property that you can check.

And scrolling on new messages can be achieved by an LaunchEffect.

[Zoff]

is there a minial example. for some reason that property seems randomly true/false even when the scrollbar is in the same positon

[Zoff]

also the scrollbar always scrolls down. maybe i am doing something wrong with my items data

[Stefan Oltmann]

What is your condition for the launch effect?

[Zoff]

LaunchedEffect(messages.last().msgDatabaseId)

[Stefan Oltmann]

Looks plausible

[Stefan Oltmann]

For the randomly true/false I would suggest that you create a small reproducer app and report an issue.

[Stefan Oltmann]

This is the template I usually use for that: https://github.com/JetBrains/compose-multiplatform-template