Bundled type definitions for bundled dependencies?
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Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 25/100
- Issue type
- Feature
- Clarity
- Needs clarification
- Activity status
- Stale
- Tech stack
- javascript, typescript
- Domain
- build-system, tooling
Research direction
Start with the context in #454 and the linked Microbundle dependency-bundling guidance. Reproduce the case where a JavaScript dependency is bundled but its exported type definitions still import that dependency, using TypeScript with skipLibCheck set to false. Done means the project has a decided scope for handling bundled dependency types and a verified reproduction or test.
Written by the indexing model from the issue text.
Description
Context: As documented in #454 and How Microbundle decides which dependencies to bundle, one recommended way to bundle dependencies is to put the dependency in devDependencies rather than dependencies.
Problem: my-bundled-dependency is bundled into my-parent-library, and affects its exported type definitions. Recently a downstream user of my package reported an issue that surprised me – while the JavaScript is bundled as expected, the type definitions are not bundled, and contain an import from my-bundled-dependency. This causes builds to fail for users of my-parent-library if they've enabled TypeScript's skipLibCheck: false. If this is unexpected and a simple repro example would be helpful, I'm happy to create that.
Alternatives: Should the type definitions also be bundled by Microbundle? By TypeScript? Am I perhaps making a mistake by using a bundled dependency in my exported TypeScript API? I'm inclined to the idea that this is something TypeScript, not Microbundle, should ideally handle. But they've historically been pretty unenthusiastic about such requests.
Related:
- Dominant language
- JavaScript
- Stars
- 8.1k
- Forks
- 358
- PR merge metrics
- No merged PRs in 30d
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