Option that treat each js file as module

[redradist]

Suggestion

Add option "typeJs": "module" (default could be "typeJs": "script")

🔍 Search Terms

How to say TypeScript that each js file is a module ?
How treat in TypeScript each js file as module ?

✅ Viability Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, new syntax sugar for JS, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

⭐ Suggestion

Add option "typeJs": "module" (default could be "typeJs": "script")

📃 Motivating Example

In NodeJs we have ability to say which module system we use by setting "type": "module" in package.json
But when I add allowJs option TypeScript compiler treat each js file as plain script and it complains about redeclaration of the same function.
It would be nice instead of renaming each js -> mjs or adding stub export {}; statement to treat each js file as module, to add option, the same way node did

💻 Use Cases

It is needed in case for example where in project bunch of scratches js files with some code that do not import or export something at this moment

[RyanCavanaugh]

See #14279

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.