rehype-katex fails with new NextJS TypeScript Project about remark-math

[ChristianMurphy]

This is not an issue with remark-math, rehype-katex, ormdx. I'm not sure it's an issue with next either.
Running MDX 2 and Next 12, with the official @mdx-js/loader, it's able to run remark-math and rehype-katex fine.
https://codesandbox.io/s/next-mdx-math-katex-vd1qx?file=/next.config.mjs

next.config.mjs

// ⚠️ Important! Please make sure the dependencies are up to date.
import remarkMath from "remark-math";
import rehypeKatex from "rehype-katex";


const configuration = {
  // Support MDX files as pages:
  pageExtensions: ["md", "mdx", "tsx", "ts", "jsx", "js"],
  // Support loading `.md`, `.mdx`:
  webpack(config, options) {
    config.module.rules.push({
      test: /\.mdx?$/,
      use: [
        // The default `babel-loader` used by Next:
        options.defaultLoaders.babel,
        {
          loader: "@mdx-js/loader",
          /** @type {import('@mdx-js/loader').Options} */
          options: {
            /* jsxImportSource: …, otherOptions… */
            remarkPlugins: [remarkMath],
            rehypePlugins: [rehypeKatex]
          },
        },
      ],
    });

    return config;
  },
};

export default configuration;

This is likely related to using mdx 1 (https://github.com/msukmanowsky/rehype-katex-issue/blob/8967ab668bbb59aae1354991728589eb271222cb/package.json#L11) with remark and rehype plugins which are compatible with mdx 2 (https://codesandbox.io/s/next-mdx-math-katex-vd1qx?file=/package.json)

As for the log you provide, it may be a next issue, there are a number of open issues related to caching strategy https://github.com/vercel/next.js/issues?q=is%3Aissue+is%3Aopen+webpack.cache.PackFileCacheStrategy
It should not however cause the issue you are seeing.

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[github-actions]

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Thanks,
— bb

[eric-burel]

Hi, for the record rehype-mathjax doesn't have an error message but seems to fail silently as well. Will try mdx v2.

[ChristianMurphy]

@eric-burel if @next/mdx is silently swallowing errors it would be something to raise with the maintainers https://github.com/vercel/next.js/issues