<@U6CU87TBM> looks like it’s duplicate of <https://youtrack.jetbrains.com/issue/KT-19177>

# javascript

[bashor]

@eldc looks like it’s duplicate of https://youtrack.jetbrains.com/issue/KT-19177

[bashor]

Could you try compile your code with 1.1.4 EAP?

[eldc]

I don't know, how difficult it is to upgrade to 1.1.4 EAP?

[eldc]

I'm still kinda new to the IntelliJ IDE.

[bashor]

You can find more info here https://discuss.kotlinlang.org/t/kotlin-1-1-4-eap/3721

[eldc]

I upgraded to 1.1.4 and it works! Thank you all for your help.

[bashor]

You're welcome

[Himanshu Sharma]

Hi everyone, I am facing same issue but with Long.compareTo .

it leads to runtime error in my JS project compareTo_11rb$ is not a function

has anyone else experienced it?

Kotlin version 1.3.61

[bashor]

@Himanshu Sharma do you have a selfcontaind example to reproduce?

[Himanshu Sharma]

@bashor so my Kotlin common code looks like

list.sortedBy { it.fee }.find { (it.fee > 0L && it.minSpend == 0L) }

after running compileKotlinJs it generates below JS

if (element.list.compareTo_11rb$(L0) > 0 && element.minSpend.compareTo_11rb$(L0) > 0) {
  firstOrNull$result = element;
  break firstOrNull$break;
}

which fails at runtime compareTo_11rb$ is not a function

[Himanshu Sharma]

apparently > was replaced by compareTo_11rb$ 🤷‍♂️

[Himanshu Sharma]

This repo is private I can make a public example for reference

[bashor]

which version of Kotlin do you use?

[Himanshu Sharma]

1.3.61

[bashor]

whould be nice if you could share self-contained example

[Himanshu Sharma]

sure will try to share it soon

[bashor]

what are type of fee and minSpend?

[Himanshu Sharma]

both are Long

[Himanshu Sharma]

hi @bashor interestingly It worked when I change type of fee and minSpend to Int instead of Long.

looks like a bug to me?

[bashor]

probably, but I still can’t reproduce it

[ilya.gorbunov]

It's most likely that while the declared type of fee and minSpend properties is Long, the actual runtime type is JS Number. It can get there for example if you deserialize your elements from JSON using JSON.parse

[Himanshu Sharma]

interesting 🤔 . I am indeed doing something similar. so what do you do in this case write a wrapper to convert JS object to kotlin at runtime. I already had to do this to convert JS Array to List

[Himanshu Sharma]

I am writing wrapper to give it a try

[bashor]

kotlinx.serialization could help you to avoid such problems

[Himanshu Sharma]

Thank you @bashor and @ilya.gorbunov this was indeed the problem.. 🙏