Type Alias WithExtensions<T, E>

WithExtensions: T extends { extensions: infer Existing }
? Omit<T, "extensions"> & { extensions: Existing & E }
: T & { extensions: E }

Type utility to merge extensions properly when chaining. If T already has extensions, merge them; otherwise add new extensions.

Type Parameters

T
E

Example

// Chaining multiple extensions preserves all types:
const client = withBazaar(withOtherExtension(new HTTPFacilitatorClient()));
// Type: HTTPFacilitatorClient & { extensions: OtherExtension & BazaarExtension }