[Feature Request] Try `jsconfig.json` if no `tsconfig.json` is found when `resolve.tsconfigPaths` is set to true

[yangmingshan]

Description

Vite only reads tsconfig.json when resolve.tsconfigPaths is set to true. It might be worth considering jsconfig.json as a fallback when no tsconfig.json is found. This would be more convenient for JS users.

Suggested solution

Search for tsconfig.json first. If it is not found, try falling back to jsconfig.json.

Alternative

A jsconfigPaths option?

Additional context

Reference: https://github.com/privatenumber/get-tsconfig

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[bluwy]

jsconfig.json isn't quite standard and is largely only used by VS Code. I did some research of it at https://github.com/bluwy/tsconfig-grimoire#jsconfigjson before and I think it's best to only support tsconfig.json.

If we want to support jsconfig.json, we'd need to keep it consistent with other TS compilations as well (for .ts files), not just for tsconfig paths, which will be a lot of overhead to support.