Hey there kotliners, I managed to find another bug...

# javascript

[andylamax]

Hey there kotliners, I managed to find another bug as well

Problem
When a function takes more than one argument, any attempt to use a previous argument to set the value of its successive argument, the JSIR compiler fails with a weird error

Reproducer
Reproducer can be found at https://github.com/andylamax/kotlin-battleground/blob/master/JSIR-DefaultArgumentU[…]rc/test/kotlin/battleground/problem/DefaultArgumentUsageTest.kt

Elaboration
Consider the following block of code

class UserService {
    fun createUser(
        name: String, tag: String = name
    ) = "User(name=$name,tag=$tag)"
}

This breaks the compiler and no output can be generated

Expected Behavior
This should work the same as it does in Kotlin/JVM and Kotlin/Native, or without @JsExport

Workaround
• Avoid using @JsExport
This problem appears to happen only when you mark interfaces and classes with @JsExport, so if you can, avoid using @JsExport

• Use nullables instead

class UserService {
    fun createUser(
        name: String, tag: String? = null
    ) = "User(name=$name,tag=${tag ?: name})"
}

Apprently, this has already been reported here. So give an up vote please