typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Native printer: `o?.tag`hi`` emits `(o?.tag) `hi`` (drops TS1358 on reparse)
- Native incremental: cached build-info drops `mapRoot`/`sourceRoot` → false emit invalidation
- Native LS: under-filled trailing-rest end-alignment labels wrong param after spreads (regressed in #64410)
- Native printer: `??`/`||`/`&&` mix after `as` elision emits SyntaxError JS
- Native parser: false TS1005 on `additive as/satisfies type` then `*/%`
- Native LS: signature help `activeParameter` wrong for expanded trailing-rest after spreads
- dirty.SyncMap: Delete then Change on same entry deadlocks
- Native declaration emit: JSDoc `@this` in `@callback`/`@overload` prints tag text as a parameter name
- Native moduleResolution: failed `typesVersions` substitution falls back to `types`/`main` (misses TS2307)
- Erasing `as` or `satisfies` can expose an invalid left operand of `**`
- Docs
- TypeScript not yet supported