`JSON.stringify(data class)` adds `_` underscore t...

# javascript

[shaktiman_droid]

JSON.stringify(data class) adds _ underscore to parameters. is there a way to avoid that?

data class Test(val email: String)
val test = Test("<mailto:[e-mail]|[e-mail]>")
val json = JSON.stringify(test)

resulting json is {"_email":"<mailto:[e-mail]|[e-mail]>"}

why is there an underscore before email ?

[ankushg]

Are you using the new JS IR? What happens if you @JsExport your entire data class?

[ankushg]

Unfortunately Kotlin just doesn't represent `data class`es as plain JS Objects, so options are limited.

We use kotlinx.serialization `encodeToDynamic`/`decodeFromDynamic` in some places for this, and manually convert to/from `external interface`s in other places for this

Not an ideal workflow

[shaktiman_droid]

Let me try JsExport there.

[shaktiman_droid]

yeah both data and regular class with @JsExport has same result with _

[shaktiman_droid]

Yes I'm using JS IR.

js(IR) {
        binaries.library()
        nodejs()
    }

[shaktiman_droid]

so without kotlinx.serialialization what option do I have?
Just manually creating a json object on kotlin/js side?

[Big Chungus]

JSON.stringify should only be used with external interfaces. Declare one yourself and convert your data class before stringifying. Alternatively you can use Json {} builder from stdlib

[Big Chungus]

There's also KON to help you

[shaktiman_droid]

Yeah I wanted to avoid manual creation if possible so we have more in common code. Let me try to add some manual code to see if I can have a graceful solution

[Big Chungus]

It's either living with manual conversions or adding heavy dependency on kotlinx.serialization

[shaktiman_droid]

😞

[ankushg]

yup, this is a big issue with using kotlin/js in a multiplatform project right now 😞