notes/oxc-transform/configuration.md
Oxc accepts ES2015 through ES2026/ESNext and versioned engine targets such as node24.15.0 (ES targets, engine targets). Before option overrides, unknown or query-bearing paths fall back to default JavaScript module parsing; lang restores TS/TSX language classification, while sourceType separately overrides parser module kind (extension map, fallback, NAPI source type).
The NAPI transform receives only filename, source text, and explicit transform options; its public options expose no tsconfig input or discovery field (options, transform path). JSX defaults to the automatic React runtime (JSX defaults); legacy decorators/metadata and TypeScript class-field behavior require explicit options (decorators, class fields). Import-elision option semantics are documented in import elision.