Debugging coroutines in kotlinJs?

Last time I tried to use coroutines in javascript, breakpoints did not work within the coroutine contexts because of source map mismatches and exceptions thrown within the context only mention the coroutine core stuff without mentioning where the exception was thrown. Has this changed at all in the last few years? I have an older library in KotlinJS that I’ve been wanting to convert from using Promises to Coroutines, but as far as I can tell coroutines in JS are still impossible to debug.