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setupServer / setupWorker type issues on ts strict mode

See original GitHub issue

Describe the bug

After upgrading to 0.21.0 typescript in strict mode is complaining when registering handlers to setupServer or setupWorker.

Tried it both using the new RequestBodyType and without.

Environment

msw: 0.21.0
nodejs: 12.18.3
npm: 6.14.6

To Reproduce

Steps to reproduce the behavior:

Clone https://github.com/deini/msw-types
npm install
npm run test

Expected behavior

No typing errors

Issue Analytics

State:
Created 3 years ago
Reactions:6
Comments:11 (5 by maintainers)

Top GitHub Comments

1reaction

kettanaitocommented, Sep 12, 2020

@aldis-ameriks, @emmenko, thank you for the follow up! I’ve issued https://github.com/mswjs/msw/pull/382 where we drop all the unknown generics altogether. Could you see if that PR fixes your usage? Thanks.

1reaction

aldis-amerikscommented, Sep 12, 2020

After pulling 0.21.1, I’m seeing these types of typing errors.

Type error: Argument of type 'ResponseTransformer<{ errors: Partial<GraphQLError>[]; }>' is not assignable to parameter of type 'ResponseTransformer<unknown>'.
137
  Types of parameters 'res' and 'res' are incompatible.
138
    Type 'MockedResponse<unknown>' is not assignable to type 'MockedResponse<{ errors: Partial<GraphQLError>[]; }>'.
139
      Type 'unknown' is not assignable to type '{ errors: Partial<GraphQLError>[]; }'.

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