Is it possible to use the built-in Node 18 fetch with ts-jest?

[finn-wa]

Starting from Node 18, a built-in fetch global is available. It's also available in Node 17.5 and above with the flag --experimental-fetch.
I'm able to use it just fine with my node application (written in TS and built by esbuild), but when I try to run tests with ts-jest, it seems to be unable to resolve the global. I get an error along the lines of ReferenceError: Headers is not defined. I can provide a repro or open an issue if needed.

[ahnpnl]

I think this might be Jest issue. You can try checking with js test files and test sources to verify it. ts-jest only transforms ts to js, which doesn’t produce Reference Error

[thw0rted]

Are you referring to this issue? DefinitelyTyped/DefinitelyTyped#60924