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kotlinlang

Is there a way to use @JsExport annotations (or other annotations, specific to its own platform) in common code?

If you figure this out (I’m told it is possible using version 1.4-M2 of Kotlin and the js plugin), I’d love to see what your build.gradle.kts looks like. I’m hoping to use that patterns to auto generate typescript defs for my nodeJs library target.

You can declare an annotation with `expect` and declare `actual typealias` in platform code.

But I had problems using Java annotations with parameters this way.

If the annotation has parameters then you need `expect`/`actual` for them as well. It’s doable, but it’s a bit of a pain because you can’t make use of `@OptionalExpectation`

For `@JsExport` in particular, it’s coming in 1.4-M2 and tracked here <https://youtrack.jetbrains.com/issue/KT-35966>

I've just tested the `expect`/`actual` for annotations with parameters and something had to be fixed in Kotlin in the last six months, because it works fine for me now. Even with `@OptionalExpectation`.

That's great - I can use spring data annotations in common code now.