Node.js Module in Typescript

Question

What must the module code (writen in typescript) look like to be able to use it like this:

/// <reference path="./onoff.ts" />

//import * as onoff from "./onoff";
var onoff = require("./onoff");

var app = onoff();

var computers: Onoff.Computer[] = [];
app.start(computers);

I was sure it must be this, but it does not work:

import * as express from "express";
export module Onoff {    

    export class Computer {

    }

    export class OnoffApp {


        start(computers:Computer[], port:number = 3489) {
           ...
        }
    }

    export default function() {
        return new OnoffApp();
    }
}

Typescript complains:

service/example.ts(5,11): error TS2349: Cannot invoke an expression whose type lacks a call signature.
service/example.ts(7,16): error TS2503: Cannot find namespace 'Onoff'.
service/example.ts(8,21): error TS2503: Cannot find namespace 'Onoff'.
typings/express/express.d.ts(14,1): error TS6053: File 'typings/serve-static/serve-static.d.ts' not found.
typings/express/express.d.ts(28,34): error TS2307: Cannot find module 'serve-static'.

thank you very much! I have no Idea what I've done wrong...

Leon Adler · Accepted Answer · 2015-11-20 11:39:30Z

1

Judging from the error description, moving the import outside of your module should fix your problem:
```
import * as express from "express";
export module Onoff {
    ...
}
```

You import your module as onoff but are trying to use Onoff

var onoff = require("./onoff");
    ^
var computers: Onoff.Computer[] = [];
               ^

edited Nov 20, 2015 at 11:39

answered Nov 19, 2015 at 20:34

Leon Adler

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4 Comments

Databyte Over a year ago

Thanks, that fixed the error in onoff.ts but not the other errors. I modified the question accordingly.

Leon Adler Over a year ago

you import your module as onoff but are trying to use Onoff

Databyte Over a year ago

If i do that it says error TS2305: Module '"service/onoff"' has no exported member 'Computer'..

Leon Adler Over a year ago

export default function() { return new OnoffApp(); } var onoff = require(...); onoff does not have a member Computer, does it? So if your main module is written in ES6, you can do import Computer from "./onoff". Alternatively, export an element that also exports Computer`.

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