Typescript declaration of decomposed class

Question

I have a I am trying to create a typing for a node module. I found that when I am using decomposed class, the code is not compiling.

This is my declaration file

declare namespace DemoNs {
  interface Foo_static {
    new(): Foo_instance;
  }

  interface Foo_instance {}

  export var Foo: Foo_static;
}


declare module 'demo-ns' {
  export = DemoNs
}

and this is my test file

/// <reference path="demo.d.ts" />

import { Foo } from 'demo-ns';

var a: Foo;

When trying to compile last line of the test file says:

error TS2304: Cannot find name 'Foo'.

Answer 1

Found the problem.

The compiler throw the error because even tough I exported Foo, there is no place saying it's a type. And therefore he isn't finding Foo.

I fixed by adding to my namespace Foo in my declaration file, the line:

export type Foo = Foo_instance;