打字稿枚举扩展未定义的值

Question

I'm trying to extend an existing enum in typescript. It's look like working when typing but value for extended enum member is undefined.

I'm using node.js 8.0.0 with tsc 2.4.2

--- ecategorytype.ts ---

export enum eCategoryType {
    generic = 'generic',

    resources = 'resources',
    friendGroup = 'friendGroup'
}

--- enumextend.ts ---

import eCategoryType from './ecategorytype';

declare module './ecategorytype' {
    export enum eCategoryType {
        classGroup = 'classGroup',
        testGroup = 'testGroup'
    }
}

--- usage ---

import eCategoryType from '../models/category/ecategorytype';
import '../models/category/enumextend';
console.log(eCategoryType.friendGroup);
console.log(eCategoryType.classGroup);
console.log(eCategoryType.testGroup);

--- enumextend.d.ts ---

declare module './ecategorytype' {
    enum eCategoryType {
        classGroup = "classGroup",
        testGroup = "testGroup",
    }
}
export {};

--- enumextend.js ---

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
//# sourceMappingURL=typeext.js.map

--- expected console output ----

friendGroup
testGroup
classGroup

--- reality console output ---

friendGroup
undefined
undefined

---

What could be wrong please?

Answer 1

You import is wrong:

import eCategoryType from '../models/category/ecategorytype';

Should be:

import {eCategoryType} from '../models/category/ecategorytype';