<https://twitter.com/intelligibabble/status/1273339533891788800> This tweet referes to using compos...

# compose

[andylamax]

https://twitter.com/intelligibabble/status/1273339533891788800

This tweet referes to using compose in any tree. Does this mean it can be applicable to kotlin/jvm for desktop? or even used in kotlin/js?

[shikasd]

As long as you have compiler plugin and runtime working on these platforms, it can be
I experimented with something like this recently in non-android jvm and managed to get it working

[andylamax]

Whooooooaaaaaaa . . . . . . . !! This opens a lot of doors

[Tristan]

@shikasd you've been working on jetpack compose for WebUI with server side rendering. How much work do you think it would take to have it working with kotlin/js?

[shikasd]

I'd wait for release of WeakRefs on js and kotlin 1.4, where k/js will have IR backend, then it should be easier 🙂

[shikasd]

Otherwise, not sure about exact estimates

[Leland Richardson [G]]

@shikasd what is it you need weak references for?

[shikasd]

@Leland Richardson [G]
Last time I have checked, compose used them in ObserverMap
I was also thinking to replace it with WeakMap, feels kinda same
mostly I was looking for IR generation for JS, and in 1.4-m2 it is still quite in progress 🙂

[Leland Richardson [G]]

ahhh, observermap

[Leland Richardson [G]]

didn’t think about that

[Leland Richardson [G]]

was thinking you were thinking about the Compositions holder map which should probably go away…

[Leland Richardson [G]]

cc @Chuck Jazdzewski [G] might have some thoughts. would ObserverMap in js need a WeakMap?

[Chuck Jazdzewski [G]]

Yes. Much of ObserverMap is trying to work around Java allowing custom equals implementation and not having ephemerals so a WeakMap is the right actual for JS.

[shikasd]

That's for confirming 🙂
Btw, do you have a timeline for merging compiler upstream?

[Leland Richardson [G]]

Btw, do you have a timeline for merging compiler upstream?

Depends what you mean by this. If you mean making the compose compiler plugin part of kotlin proper, there are no plans for that currently.

[Leland Richardson [G]]

If you mean when will we rebase our version of kotlin with master, the answer is as soon as we get the build to go green 🙂

[Leland Richardson [G]]

and if you mean when will compose work with a proper version of kotlin… the hopeful but not certain answer for that is 1.4

[shikasd]

I meant current master, but thanks for this extensive reply :)