Using typescript in node.js

Question

Here is my code:

/// <reference path="typings/node/node.d.ts"/>

var net = require('net');
var x:net.net.Socket;

I wanna declare variable x as type Socket, but an error is reported TS2503: cannot find namespace net

This is a portion of node.d.ts :

declare module "net" {
    import stream = require("stream");

    export interface Socket extends stream.Duplex {
        // Extended base methods
        write(buffer: Buffer): boolean;
        write(buffer: Buffer, cb?: Function): boolean;
        write(str: string, cb?: Function): boolean;
        write(str: string, encoding?: string, cb?: Function): boolean;
        write(str: string, encoding?: string, fd?: string): boolean;

        connect(port: number, host?: string, connectionListener?: Function): void;
        connect(path: string, connectionListener?: Function): void;
        bufferSize: number;
        setEncoding(encoding?: string): void;
        write(data: any, encoding?: string, callback?: Function): void;
        destroy(): void;
        pause(): void;
        resume(): void;
        setTimeout(timeout: number, callback?: Function): void;
        setNoDelay(noDelay?: boolean): void;
        setKeepAlive(enable?: boolean, initialDelay?: number): void;
        address(): { port: number; family: string; address: string; };
        unref(): void;
        ref(): void;

Did you try to rename the net var to something else (like var netService = require('net');) and use the Socket interface of the module net with var x: net.Socket;? — Benoit
– Benoit, Commented Aug 9, 2015 at 7:00
Take a look at the typeof keyword as described in TypeScript Handbook: Optional Module Loading and Other Advanced Loading Scenarios — xmojmr
– xmojmr, Commented Aug 9, 2015 at 7:16

Vadim Macagon · Accepted Answer · 2015-08-09 14:35:01Z

4

In TypeScript 1.5+:

import * as net from 'net';

let mySocket: net.Socket;

Or

import { Socket } from 'net';

let mySocket: Socket;

answered Aug 9, 2015 at 14:35

Vadim Macagon

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