npm install express

Fast, unopinionated, minimalist web framework

About express

Express is a fast, unopinionated, and minimalist web framework for Node.js, designed to build web applications and APIs with ease. It stands out in the developer community for its performance and simplicity, making it an optimal choice for both beginners and experienced developers. Express streamlines the development process by providing a robust set of features for web and mobile applications without obscuring the features of Node.js, allowing you to create powerful applications with minimal overhead.

To get started with Express in your project, you can simply run the command `npm install express` in your Node.js environment. This command installs the Express framework, adding it as a dependency in your project, which allows you to start building your web applications immediately. The installation process is straightforward, thanks to npm (Node Package Manager), which handles all the dependencies and versions for you, ensuring that you always have the latest features and security updates available.

The primary benefit of using Express is its ability to expedite the development process. With its set of HTTP utility methods and middleware, you can create robust APIs quickly and efficiently. Furthermore, Express has a vast ecosystem of plugins, contributing to its flexibility and adaptability to a wide range of needs. This makes it an invaluable tool for developers looking to create high-quality, maintainable, and scalable web applications. Whether you're building a simple website or a complex API, Express provides the simplicity and power you need to accomplish your project goals effectively.

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Dependencies

Core dependencies of this npm package and its dev dependencies.

accepts, array-flatten, body-parser, content-disposition, content-type, cookie, cookie-signature, debug, depd, encodeurl, escape-html, etag, finalhandler, fresh, http-errors, merge-descriptors, methods, on-finished, parseurl, path-to-regexp, proxy-addr, qs, range-parser, safe-buffer, send, serve-static, setprototypeof, statuses, type-is, utils-merge, vary, after, connect-redis, cookie-parser, cookie-session, ejs, eslint, express-session, hbs, marked, method-override, mocha, morgan, nyc, pbkdf2-password, supertest, vhost

Documentation

A README file for the express code repository. View Code

Express Logo

Fast, unopinionated, minimalist web framework for Node.js.

This project has a Code of Conduct.

Table of contents

NPM Version NPM Install Size NPM Downloads

const express = require('express')
const app = express()

app.get('/', function (req, res) {
  res.send('Hello World')
})

app.listen(3000)

Installation

This is a Node.js module available through the npm registry.

Before installing, download and install Node.js. Node.js 0.10 or higher is required.

If this is a brand new project, make sure to create a package.json first with the npm init command.

Installation is done using the npm install command:

$ npm install express

Follow our installing guide for more information.

Features

Docs & Community

PROTIP Be sure to read Migrating from 3.x to 4.x as well as New features in 4.x.

Quick Start

The quickest way to get started with express is to utilize the executable express(1) to generate an application as shown below:

Install the executable. The executable's major version will match Express's:

$ npm install -g express-generator@4

Create the app:

$ express /tmp/foo && cd /tmp/foo

Install dependencies:

$ npm install

Start the server:

$ npm start

View the website at: http://localhost:3000

Philosophy

The Express philosophy is to provide small, robust tooling for HTTP servers, making it a great solution for single page applications, websites, hybrids, or public HTTP APIs.

Express does not force you to use any specific ORM or template engine. With support for over 14 template engines via Consolidate.js, you can quickly craft your perfect framework.

Examples

To view the examples, clone the Express repo and install the dependencies:

$ git clone https://github.com/expressjs/express.git --depth 1
$ cd express
$ npm install

Then run whichever example you want:

$ node examples/content-negotiation

Contributing

Linux Build Windows Build Test Coverage

The Express.js project welcomes all constructive contributions. Contributions take many forms, from code for bug fixes and enhancements, to additions and fixes to documentation, additional tests, triaging incoming pull requests and issues, and more!

See the Contributing Guide for more technical details on contributing.

Security Issues

If you discover a security vulnerability in Express, please see Security Policies and Procedures.

Running Tests

To run the test suite, first install the dependencies, then run npm test:

$ npm install
$ npm test

People

The original author of Express is TJ Holowaychuk

The current lead maintainer is Douglas Christopher Wilson

List of all contributors

TC (Technical Committee)

TC emeriti members

TC emeriti members

Triagers

Triagers emeriti members

Emeritus Triagers

License

MIT