Re-export type from another module

[magic-akari]

Suggestion

🔍 Search Terms

• TS1383
• re-export type

List of keywords you searched for before creating this issue. Write them down here so that others can find this suggestion more easily and help provide feedback.

✅ 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

Allow re-export type.

We can use export from statement in JavaScript..

export { foo } from "mod"

and in TypeScript, we can export type from another module.

export type { foo } "mod";
// or
export { type foo } from "mod";

Note: They are different when transforming to JavaScript.
The first statement will be removed and the second will be export {} from "mod" or import "mod".

When it comes to re-export, for example,

export * from "mod";

If we try to write

export type * from "mod";

We will get a TS1383 error.

Only named exports may use 'export type'.

📃 Motivating Example

To be added.

I have no strong need for it, just as a record.

💻 Use Cases

export * from "mod" will generate runtime export statement. To avoid this, one has to list all the type.

export type { foo, bar, baz, ...and more } from "mod";

[whzx5byb]

Duplicate of #37238

[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.