microsoft / microsoft/TypeScript
Does not find .mts file when doing extensionless import and Bundler
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Description
🔎 Search Terms
mts bundler
🕗 Version & Regression Information
- This is the behavior in every version I tried, and I reviewed the FAQ for entries about Bundler
⏯ Playground Link
cannot test modulerResolution in the playground
💻 Code
tsconfig.json
moduleResolution: "Bundler"
file.mts
export const hi = 1
file2.mts
import {hi} from './file'
🙁 Actual behavior
fails to find ./file
🙂 Expected behavior
should resolve just like a bundler, so it should find the .mts file
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
Reproduce the case using tsconfig.json with moduleResolution set to Bundler, file.mts, and file2.mts importing './file'. Start by tracing the compiler's Bundler module-resolution path for extensionless imports; done means the .mts file resolves and the behavior has regression coverage.
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
- Mostly clear
- Newbie friendliness
- 35/100