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# javascript

[Slackbot]

This message was deleted.

[spand]

What if you ?.let instead of !! ?

[spand]

refs are null on unmount

[Harrison]

No luck 😞 I had it behind a null check too when I first noticed it

[Harrison]

getClientRects also causes the same issue

[Harrison]

Also just want to add that the functions return, just that the rendering seems to stop after calling it

[Harrison]

And i am calling this inside

useEffect(*emptyArray())

[Harrison]

Also strangely if I run the function outside useeffect in a coroutine I don’t have the issue

scope.launch {
    delay(2000)
    val b = parentDivRef.current!!.getClientRects()

}

[Harrison]

Seems like it is related to this. Have a delay seems to fix it somehow. So not kotlinjs related. Very odd bug

https://stackoverflow.com/a/26348974/7954697