Options

parserTs and parserTsx accept the same single option, extension, which rewrites the import and export extensions the TypeScript parser emits.

Options overview

Option details

extension

Rewrites the extensions emitted in import/export statements. Keys are the source extension, values the output, and '' drops it. Only the module-specifier string changes, never the on-disk filename.

Use it to emit .js imports from .ts sources for an ESM dual package, or to keep the source extension for Node16/NodeNext resolution.

The same mapping applies to runtime templates a plugin copies into the output, such as the .kubb/ runtime files of @kubb/plugin-fetch. Their top-level import and export … from statements become import and export nodes, so the whole output follows one convention.

parserTs({ extension: { '.ts': '.js' } }) // import './api.js' instead of './api'
parserTs({ extension: { '.ts': '.ts' } }) // import './api.ts' instead of './api'