Overriding `tsconfig.json` for ts-node in mocha

Question

Is it possible to override which tsconfig.json ts-node uses when called from mocha?

My main tsconfig.json contains \"module\": \"es20

Answer 1

While there doesn't seem to be a unified linux/windows command line phrasing that works, you can set the compiler-options from the command line. In my case, much like the OP, I have a tsconfig.json with a module: esnext. I was able to override on the command line:

Ran on Windows, w/ts-node installed globally, but in different shell types:

bash/mingw64:
ts-node --compiler-options={"module":"commonJS"} xxx.ts

cmd:
ts-node --compiler-options={\"module\":\"commonJS\"} xxx.ts

Answer 2

In package.json - scripts section:

"test": "TS_NODE_PROJECT=src mocha"

picks up my tsconfig.json in the src directory of my project, overriding the default tsconfig.json.

OP can achieve same by using test instead of src