Unclear how to integrate in typescript projects

[ArsLucidum]

I'm trying to use jest-light-runner on a testing project, and can't really understand the process I'm supposed to be following, if there is support for such a setup.

What I'm currently doing is adding the runner: "jest-light-runner" option to my jest config (which by itself will output errors for Unknown file extension ".ts").

I understand this is due to on-the-fly compilation not being supported, as mentioned by the docs. It is mentioned that I should use something like ts-node/esm, which I set up with the flag --loader ts-node/esm as part of NODE_OPTIONS.

Doing so is getting me random errors (from pino, our logger, not sure why). Is there anything else I should do? Does typescript support actually rely on this experimental node option, or is there anything else I'm missing?

[ticup]

@kace91 You can just compile your typescript files with tsc and then instruct jest to run the compiled javascript files.