Repository navigation
Cannot export a value if re-exporting a type with same name #42633
Description
Bug Report
TypeScript usually allows exporting values and types with the same name.
// a.ts
export const a = 1
export type a = stringBut it doesn't work when re-exporting a type from a third-party library and exporting an arbitrary value at the same time.
// b.ts
export const a = 1
export type { a } from './a' 🔎 Search Terms
export type re-export error
🕗 Version & Regression Information
- Bug present in 4.1.3
- This is the behavior in every version I tried, and I reviewed the FAQ for entries about re-export
⏯ Playground Link
https://codesandbox.io/s/misty-field-16f9f?file=/src/index.ts
💻 Code
export type { A } from "./a";
export const A = Symbol("A");
🙁 Actual behavior
Error:
Cannot redeclare exported variable 'A'. ts(2323)
🙂 Expected behavior
I would expect this to work since the re-exported name is purely a type.
Activity
DanielRosenwasser commentedon Feb 4, 2021
I think this is working as intended. Import/export aliases can't merge with local declarations in TypeScript. What's more,
export typedoesn't strictly import the type side of things, it only restricts the things you can do with that import to type-like positions, so even if we wanted to ease the restriction just forexport type, we still couldn't.See
paul-marechal commentedon Feb 4, 2021
Should this limitation on merging behavior be documented in the appropriate section of the official documentation?
typescript-bot commentedon Feb 7, 2021
This issue has been marked 'Working as Intended' and has seen no recent activity. It has been automatically closed for house-keeping purposes.