I'm trying to make a multiplatform WeakrefMap, but for some reason WeakRef/WeakMap is not available ...

# multiplatform

[martmists]

I'm trying to make a multiplatform WeakrefMap, but for some reason WeakRef/WeakMap is not available on the JS target. What can I do instead?

[ephemient]

the WeakRef proposal for JS was only accepted for ES12 and Kotlin/JS still targets ES5, so you can't really do anything (in a cross-platform safe way)

[martmists]

But isn't it already available in every browser and nodejs? https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap

[ephemient]

Kotlin/JS isn't up to date with the latest JS standards

[ephemient]

https://youtrack.jetbrains.com/issue/KT-8373/JS-support-ES6-as-compilation-target

[martmists]

I see, so there's currently no way to have a weakmap equivalent in Kotlin/JS?

[CLOVIS]

In case anyone searches for this in the future, it's been added to the kotlin-js module in the official Kotlin Wrappers

I made a multiplatform wrapper: https://opensavvy.gitlab.io/groundwork/pedestal/api-docs/weak/index.html (discussion in #C078Z1QRHL3)