If you are encountering a TypeError while trying to load MDX in Next.js using mdx-js/react, there could be a few possible reasons. Let's go through some common issues and solutions:

  1. Missing MDX Loader: Ensure that you have installed the required dependencies for MDX support in Next.js. You need to have @mdx-js/loader installed along with mdx-js/react. Install them using the following command:
npm install @mdx-js/loader mdx-js/react
  1. Missing MDX Configuration: Make sure you have set up the MDX configuration in your Next.js project. Create a next.config.js file in the root of your project (if you don't have one already) and include the necessary MDX configuration:
// next.config.js const withMDX = require('@next/mdx')(); module.exports = withMDX({ // Add other Next.js configuration options as needed });
  1. Missing MDX Loader in Next.js Custom Webpack Configuration: If you have a custom Webpack configuration in your Next.js project, ensure that you have added the MDX loader to it. Include the following rule in your Webpack configuration:
// next.config.js const withMDX = require('@next/mdx')(); module.exports = withMDX({ webpack(config, options) { config.module.rules.push({ test: /\.mdx?$/, use: [ options.defaultLoaders.babel, { loader: '@mdx-js/loader', }, ], }); return config; }, });
  1. Versions Compatibility: Check the versions of the dependencies you have installed. Sometimes, incompatible versions of packages can lead to TypeErrors. Ensure that you have compatible versions of Next.js, @mdx-js/react, and @mdx-js/loader.

  2. File Extension: Make sure that your MDX files have the .mdx extension. The MDX loader will only process files with this extension.

After addressing any of the above potential issues, restart your Next.js development server and try loading the MDX content again. If the TypeError persists, double-check your MDX usage and make sure it aligns with the official Next.js documentation for MDX support. If the problem still persists, provide more specific details about the TypeError and the code that triggers it, so we can further assist you in troubleshooting the issue.

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