Exporting classes and interfaces to a module in typescript for the node.js package

I have one interface for Exception and one concrete class that inherits from this interface. I want to export these types to a module as a node.js package.

iexp.ts

interface IException {}

      

        
        
        
      

    

exp.ts

class Exception implements IException {}

      

        
        
        
      

    

index.ts

module AB_Company {
    export IException;
    export Exception;
}
export {AB_Company};

      

        
        
        
      

    

Codes below for viewing the scene. But I was unable to achieve this in order to export this module.

client will be used like this

import {AB_Company} from "AB_Company_Exception";
let exp:AB_Company.IException;