[GH-ISSUE #659] `rsc:scan-strip` parses MDX files as JS before `@mdx-js/rollup` transforms them, causing parse errors #138

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opened 2026-05-06 12:37:34 +02:00 by BreizhHardware · 0 comments

BreizhHardware commented

2026-05-06 12:37:34 +02:00

Owner

Originally created by @keufcp on GitHub (Mar 22, 2026).
Original GitHub issue: https://github.com/cloudflare/vinext/issues/659

Environment

vinext: 0.0.34
@vitejs/plugin-rsc: 0.5.21
@mdx-js/rollup: (installed, auto-detected by vinext)

Problem

When using import.meta.glob to dynamically load MDX files in an RSC page,
the rsc:scan-strip plugin attempts to parse .mdx files as JavaScript
before @mdx-js/rollup has a chance to transform them. This causes a parse error.

Error

[plugin rsc:scan-strip] src/content/posts/2025/08/20/second-post/index.mdx
Error: Parse error @:1:1

The MDX files contain standard frontmatter (YAML between ---) and JSX syntax
(e.g. <span className='text-red-500'>), which are valid MDX but invalid JavaScript.

Root cause

rsc:scan-strip runs before @mdx-js/rollup in the plugin pipeline,
so it sees raw MDX instead of the transformed JS output.

Reproduction

Create an App Router project with MDX content files containing frontmatter
Use import.meta.glob('/src/content/posts/**/*.mdx') in a lib file
Run vite build

Expected behavior

@mdx-js/rollup should transform MDX files to JS before rsc:scan-strip processes them,
or rsc:scan-strip should skip non-JS files that will be handled by other plugins.

Workaround

None found without changing the content file structure.

Originally created by @keufcp on GitHub (Mar 22, 2026). Original GitHub issue: https://github.com/cloudflare/vinext/issues/659 ## Environment - vinext: 0.0.34 - @vitejs/plugin-rsc: 0.5.21 - @mdx-js/rollup: (installed, auto-detected by vinext) ## Problem When using `import.meta.glob` to dynamically load MDX files in an RSC page, the `rsc:scan-strip` plugin attempts to parse `.mdx` files as JavaScript before `@mdx-js/rollup` has a chance to transform them. This causes a parse error. ## Error ``` [plugin rsc:scan-strip] src/content/posts/2025/08/20/second-post/index.mdx Error: Parse error @:1:1 ``` The MDX files contain standard frontmatter (YAML between `---`) and JSX syntax (e.g. `<span className='text-red-500'>`), which are valid MDX but invalid JavaScript. ## Root cause `rsc:scan-strip` runs before `@mdx-js/rollup` in the plugin pipeline, so it sees raw MDX instead of the transformed JS output. ## Reproduction 1. Create an App Router project with MDX content files containing frontmatter 2. Use `import.meta.glob('/src/content/posts/**/*.mdx')` in a lib file 3. Run `vite build` ## Expected behavior `@mdx-js/rollup` should transform MDX files to JS before `rsc:scan-strip` processes them, or `rsc:scan-strip` should skip non-JS files that will be handled by other plugins. ## Workaround None found without changing the content file structure.