Interfaces

The interfaces in core/interfaces/. Type-only — none of these exist at runtime.


import type { IBuilder, IHandler } from "@drashland/drash/core/Interfaces.js";

Each also has its own specifier, e.g. @drashland/drash/core/interfaces/IHandler.js.

`IBuilder<Product>`


interface IBuilder<Product = unknown> {
  build(): Product;
}

Implemented by AbstractChainBuilder and the resource group builder. Product is what build() returns. Standard declares a structurally identical Builder<C> that ResponseBuilder implements instead — see Builders.

`IHandler<Input>`


interface IHandler<Input = unknown> {
  handle<Res>(req: Input): Promise<Res>;
  setNext(h: IHandler): IHandler;
}

The contract for a link in the chain. Handler is the Standard implementation of it.

setNext() returns the handler it was given, not this, which is what lets a chain be linked in one pass:


a.setNext(b).setNext(c); // a -> b -> c

Notes

Every entry here is export type, so import type is the correct form. Importing them without the type keyword leaves a runtime import of a module with no runtime exports — harmless under a bundler, and a resolution error without one.