Note that jest before v27, and some other runtimes, don't support export maps.

paulddraper · on Sept 24, 2023

Jest and every other major runtime/bundler has supported exports for a couple years.

I.e. if you're releasing a package today, you probably don't have to worry about support.

rattray · on Sept 25, 2023

A package I help maintain was released about a month ago, and we've had bug reports related to this: https://github.com/openai/openai-node/issues/304#issuecommen...

We simply chose to mark Jest 27 as unsupported in this case, but it did cost some debugging time.