Function isHandlerByMethod

packages/fresh/src/handlers.ts:100–105

(
  handler: RouteHandler<D, S> | RouteHandler<D, S>[] | null,
)

  | HandlerByMethod<Data, State>;

export function isHandlerByMethod<D, S>(
  handler: RouteHandler<D, S> | RouteHandler<D, S>[] | null,
): handler is HandlerByMethod<D, S> {
  return handler !== null && !Array.isArray(handler) &&
    typeof handler === "object";
}

/**
 * A handler function that is invoked when a request is made to a route. The