NPM @types/node Package

Table of Contents

  • Usage
  • Installation
  • Usage
  • Configuration
  • Best Practices

Usage

The @types/node package provides type definitions for the Node.js JavaScript APIs. These type definitions allow you to use Node.js APIs in TypeScript code with full type checking.

To use the @types/node package, you must first install it using a package manager such as npm. Once installed, you can import the types into your TypeScript code using the following syntax:

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

Once you have imported the types, you can use the Node.js APIs in your TypeScript code as you would in JavaScript. For example, the following code loads the fs module and uses it to read the contents of a file:

import * as fs from "fs";

const data = fs.readFileSync("file.txt", "utf8");

Installation

The @types/node package can be installed using npm:

npm install @types/node --save-dev

Configuration

There are no configuration options for the @types/node package.

Best Practices

When using the @types/node package, it is important to follow these best practices:

  • Always import the types using the /// <reference path="node.d.ts" /> syntax.
  • Use the types to help you write correct and type-safe TypeScript code.
  • Keep the @types/node package up to date.

Examples

The following are some examples of how to use the @types/node package:

  • Example 1: Use the fs module to read the contents of a file
import * as fs from "fs";

const data = fs.readFileSync("file.txt", "utf8");
  • Example 2: Use the http module to create a server
import * as http from "http";

const server = http.createServer((req, res) => {
  res.writeHead(200, {"Content-Type": "text/plain"});
  res.end("Hello, world!");
});

server.listen(3000);
  • Example 3: Use the typescript module to compile TypeScript code
import * as typescript from "typescript";

const program = typescript.createProgram(["file.ts"]);
const emitResult = typescript.emit(program);