There was a module parsing error that occurred due to an unexpected token being found while the 'use client' statement was present

Currently, I am in the process of creating an npm package specifically designed for nextjs projects. Everything has been going smoothly so far. However, my package includes multiple server components and one client component. This particular file contains 'use client' at the top. When trying to load this component in my nextjs project, I encounter the following error:

Module parse failed: Unexpected token (7:43)
You may need an appropriate loader to handle this file type, as currently no loaders are configured to process this file. For more information on loaders, please visit https://webpack.js.org/concepts#loaders

By removing the 'use client' statement, the error disappears and the component is rendered successfully. Nevertheless, it is essential for me to keep it as a client component in order to utilize certain client methods.

The source files for my package consist of both ts and tsx files, which build into .js and .jsx files in the dist folder. While this setup works well for server components, it seems to present challenges when dealing with client components. How can I resolve this issue?

typescriptnext.jsjsxnext.js13

Answer №1

To resolve this issue, follow these steps:

  1. In the tsconfig.ts file of the module, ensure you have the following: 

    "plugins": [ { "name": "next" } ]

  2. In the next.config.ts file for the host app, make sure to include your new module in the configuration:

  transpilePackages: [
    '@mydomain/newModule', 
  ],

For more information, refer to: How to fix "You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file."

(In my experience, the most effective way to create shared modules for next apps is to publish them as untranspiled TypeScript and let Next.js handle the transpilation during the build process. This approach simplifies and streamlines the development workflow)

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