routing-controllers/types/decorator/JsonController.d.ts

import { ControllerOptions } from '../decorator-options/ControllerOptions';
/**
 * Defines a class as a JSON controller. If JSON controller is used, then all controller actions will return
 * a serialized json data, and its response content-type always will be application/json.
 *
 * @param baseRoute Extra path you can apply as a base route to all controller actions
 * @param options Extra options that apply to all controller actions
 */
export declare function JsonController(baseRoute?: string, options?: ControllerOptions): (object: Function) => void;