Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Stencil Version

4.28.0

Current Behavior

After updating to the latest StencilJS version, which includes an upgrade to the latest Rollup version, Rollup no longer processes .mts files correctly. This issue affects our setup using @floating-ui and i18next. The same configuration worked fine in previous StencilJS versions.

Expected Behavior

To support .mts files like previous versions

System Info

No response

Steps to Reproduce

• Update StencilJS to the latest version, which includes the Rollup upgrade.
• Use a project that includes .mrt files (e.g., when using @floating-ui or i18next).
• Run the StencilJS build process.
• Observe that Rollup fails to process .mts files, causing the build to break.

Code Reproduction URL

https://github.com/a7medm7med/stencils-rollup-issue

Additional Information

No response