TypeScript: extending imported enum

Question

I can merge enum declarations within a single file e.g.

export enum Test {
  value1 = \'value1\',
  value2 = \'value2\'
}

export enum          


        

Answer 1

In refer to https://github.com/Microsoft/TypeScript/pull/6213 you can do :

// test.enum.ts
export enum Test {
  value1 = 'value1',
  value2 = 'value2'
}

// place-to-extend-enum.ts
import { Test } from './test.enum';

declare module './test.enum' {
  export enum Test {
    value3 = 'value3'
  }
}

... Magic! ;)