jest-module-field-resolver

This package is for jest to use packages that don't have main field in their package.json.

Usage

1. install the package

   $ npm i -D jest-module-field-resolver
   

2. add jest-module-field-resolver as the resolver of jest, and transformIgnorePattern so that the package missing main field can be transpiled correctly when running jest.

   In your package.json, please add them as follows:

   {
     ...
     "jest": {
       ...
       "transformIgnorePattern": "node_modules/(?!(package_1|package_2)/)",
       "resolver": "jest-module-field-resolver"
     }
   }

Note

Ref: https://github.com/facebook/jest/issues/2702#issuecomment-585595612

This is based on https://gist.github.com/loklaan/9fe7768576466c5a31c2e7af4cfdecd0.