How to solve the "module has no exported member" error?

Question

I am following instructions from the this answer, but cannot make the solution work.

Overview

I want to use import { Type } from "Module" instead of /// <reference path="..." />

Structure

-app\
  -ViewModel.ts
  -Program.ts

ViewModel.ts

export module Demo {
    export class ViewModel {
        constructor(public test: string) {
        }
    }
}

Program.ts

import { ViewModel } from "ViewModel";

Module 'C:/DemoApp/app/ViewModel' has no exported member 'ViewModel'.

and...

Only 'amd' and 'system' modules are supported alongside --outFile.

Goal

I want to be able to reference dependencies so that they compile to a single file in order.

If I add "module": "system" I still get the 1st of the aforementioned errors.

As per the 1st solution, I do not want to lose namespaces.

Possible duplicate: http://stackoverflow.com/questions/30357634/how-do-i-use-namespaces-with-typescript-external-modules — artem, Jan 25 '17 at 21:55

Ali Baig · Accepted Answer · 2017-01-25T21:41:22.003

22

Remove the line below from your statement

export module Demo

and use it like

export class ViewModel {
    constructor(public test: string) {
    }
}

Edit: For namespace, just do something like

namespace Demo {
  export class ViewModel {
        constructor(public test: string) {
        }
    }
}

edited Jan 25 '17 at 21:41

answered Jan 25 '17 at 21:31

Ali Baig

I've updated my answer, see if it works now. Read more about it here: https://www.typescriptlang.org/docs/handbook/namespaces-and-modules.html – Ali Baig Jan 25 '17 at 21:43
When I do this I get the error File 'pathtofile' is not a module – greg Jul 14 '18 at 17:32

score 0 · Answer 2 · answered Feb 22 '22 at 14:59

0

One reason can be typo.

export const Demo = () => {} cannot be exported if it does not return a value.

export const Demo =()=> () can be exported without return.

answered Feb 22 '22 at 14:59

AhuraMazda

score -2 · Answer 3 · answered Jul 26 '22 at 07:02

-2

May not be or check the module which you're using there.

export a () => {
   console.log("Hello world!");
}

answered Jul 26 '22 at 07:02

user19622927

As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Goutham J.M Jul 28 '22 at 09:10
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3 Answers3