eslint rule no-document-import-in-page does not respect pageExtensions

[stefanprobst]

What version of Next.js are you using?

10.2.3

What version of Node.js are you using?

14.17.0

What browser are you using?

Firefox

What operating system are you using?

Ubuntu

How are you deploying your application?

Describe the Bug

when setting pageExtensions in next.config.js to e.g. page.tsx, the "no-document-import-in-page" rule included in eslint-plugin-next falsely warns that "next/document should not be imported outside of pages/_document.js."

Expected Behavior

eslint rule should respect pageExtensions

To Reproduce

• create next project with yarn create next-app --typescript and enable eslint
• add pageExtensions: ["page.tsx"] to next.config.js
• add pages/_document.page.tsx and see error

[pacexy]

The problem appears again in v11.1.2.

[balazsorban44]

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