typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Fixed crash related to index type deferral on generic mapped types with name types
- [ServerErrors][JavaScript] 5.8.0-dev.20241117 vs 5.6.3
- [ServerErrors][TypeScript] 5.8.0-dev.20241117 vs 5.6.3
- [NewErrors] 5.8.0-dev.20241117 vs 5.6.3
- v5.5.4 regression "Error: Debug Failure. False expression." when using incremental `const x = { ...({} as { [K in keyof { someKey?: any }]?: undefined }) }`
- Missing Boolean.toString definition and loose valueOf definition
- Non-null assertion operator whitespace allowances can create confusing conditional statements
- Inconsistent type narrowing behavior between compound assignment operators and their expanded equivalents
- Proposal: Enchance typeguards to infer type based on the returned type
- Remove getNonNullableType application in checkIdentifier
- Docs
- TypeScript not yet supported