Transform the Import Attributes proposal (import ... from '...' with { ... }
) to the previous version known as Import Assertions (import ... from '...' assert { ... }
).
Transform json modules imports (import '...' with { type: 'json' }
) to work in browsers and Node.js.
Transform source phase imports (import source ... from '...'
) to work in browsers and Node.js, assuming that the imported source is a WebAssembly module.
First-class ECMAScript decorators for caching, binding, and concurrency patterns
Ponyfill's for some native ES2017+ built-in methods