Is it possible to include a NodeJS module in a TypeScript Project with "import"

Question

I am converting my NodeJS + ExpressJS project to typescript and I got a Typescript definition for ExpressJS from https://github.com/borisyankov/DefinitelyTyped.

Before Typescript I imported Express with a "require" statement

var express = require("express")

No I need to import it in way that I can use Typescript Syntax and capabilities while ensuring that the Typescript compiler compiles it to the statement shown above. Here's the code I wrote:

/// <reference path="express.d.ts" />
import express = require("express");
var app = express.express();
app.use(express.logger());

This however throws the error: Unresolved function or method express() at:

var app = express.express();

Does the definition file not already declare an express namespace? Maybe this is causing a naming clash? — thomaux
– thomaux, Commented Dec 13, 2013 at 8:16
The express namespace is there. But doesn't have an express() function inside it. I've added that manually and seems to work for now. — EternallyCurious
– EternallyCurious, Commented Dec 13, 2013 at 14:08

basarat · Accepted Answer · 2013-12-13 23:21:19Z

5

I believe that should be :

import express = require('express');
var app = express();

See example : https://github.com/borisyankov/DefinitelyTyped/blob/master/express/express-tests.ts#L3-L4

answered Dec 13, 2013 at 23:21

basarat

278k60 gold badges475 silver badges528 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

EternallyCurious Over a year ago

Hi, You pointed me to "express-tests.ts" and I'm using "express.d.ts". Whats the difference? Which one should I add to my project? I got this working eventually but I had to add the "express()" function manually to express.d.ts file.

basarat Over a year ago

You should import express.d.ts. The file express-tests.ts shows you how you can use express.d.ts in your own application.

Collectives™ on Stack Overflow

Is it possible to include a NodeJS module in a TypeScript Project with "import"

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related