I have cypress in an angular project (using angular cli). It has a

cypress

folder in the root (which contains a

tsconfig.json

) and a

cypress.config.ts

at root level. There I am trying to import a file from my angular app which sits at

./src/app/foo

. If I try to import that, I get a

TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts"