Bug: Cannon use processor and recommended configs together

[marekdedic]

Environment

ESLint version: v9.25.0
@eslint/markdown version: 6.4.0
Node version: v22.11.0
npm version: 11.3.0
Operating System: Ubuntu 24.04

Which language are you using?

commonmark

What did you do?

Configuration

export default tseslint.config(
  ...markdown.configs.processor,
  ...markdown.configs.recommended,
);

## Adding images dynamically to lightbox

###### Example:

```js
const lightbox = new ImageLightbox(
    document.querySelectorAll('a[data-imagelightbox="xyz"]'),
)
```

What did you expect to happen?

2 errors:

• About headings going from 2 -> 6 (MD error)
• About ImageLightbox not being defined (JS error)

What actually happened?

Just one error - the JS one.

Link to Minimal Reproducible Example

N/A

Participation

• I am willing to submit a pull request for this issue.

Additional comments

No response

[nzakas]

Yes, this is a limitation of ESLint. You need to either use the processor to lint JS examples or use the recommended config to lint the Markdown itself. Currently there's no way to use both at the same time. (we actually end up running ESLint twice, once to lint the Markdown and once to lint the embedded JS) We hope at some point in the future the core will have a solution for this.