microsoft / microsoft/TypeScript
Default type imported with `import type` from not-found module not flagged when used as a value
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Description
🔎 Search Terms
cannot be used as a value because it was imported using import type
🕗 Version & Regression Information
- This is the behavior in every version I tried
⏯ Playground Link
💻 Code
import type T from
// @ts-expect-error
'mod';
const t = T;
import {type U} from
// @ts-expect-error
'mod';
const u = U;
🙁 Actual behavior
TS does not error on the usage of T.
TS errors on the usage of U with the error
'U' cannot be used as a value because it was imported using 'import type'.(1361)
🙂 Expected behavior
TS errors on the usage of T with the error
'T' cannot be used as a value because it was imported using 'import type'.(1361)
TS errors on the usage of U with the error
'U' cannot be used as a value because it was imported using 'import type'.(1361)
Additional information about the issue
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked TypeScript Playground reproduction and compare the default import type T case with the named import {type U} case. Trace the type-checking path for value usage of imported symbols, then add coverage showing that both usages produce diagnostic 1361.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 35/100