typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Avoid allocations and no-op work during type inference
- Adds missing methods from checker api
- Speed up node lookup by position, import scanning, and node allocation
- Avoid allocations and redundant work when checking calls and object literals
- Pre-size member, export, and locals symbol tables
- Avoid unnecessary work and allocations when instantiating type
- Allow content mapper registrations to filter their files with an `include` glob, inherit default `extension` from manifest
- declaration emit depends on checker assignment; a type alias becomes `any` with no error
- Top-level await reparse keeps statements it already consumed when it reaches the end of the file
- Format Document is not idempotent when a line break moves a token that enclosing nodes start at
- Docs
- TypeScript not yet supported