Description

This project demonstrates a typescript compilation issue that occurs when compiling types generated by apollo client:codegen when the following are true:

• Typescript compiler is version 3.7 or above
• The named mutation matches the called mutation (see UpdateBookMutation.ts)

Prerequisites

Apollo should be installed globally.

• yarn global add apollo

Start local graphql server

• cd server
• yarn
• yarn start

Generate client types

• cd client
• yarn
• yarn gql:gen
• yarn build <- this is where error occurs

The exact error message is:

error TS2440: Import declaration conflicts with local declaration of 'UpdateBook'.