1 [![Express Logo](https://i.cloudup.com/zfY6lL7eFa-3000x3000.png)](http://expressjs.com/)
3 Fast, unopinionated, minimalist web framework for [node](http://nodejs.org).
5 [![NPM Version][npm-image]][npm-url]
6 [![NPM Downloads][downloads-image]][downloads-url]
7 [![Linux Build][travis-image]][travis-url]
8 [![Windows Build][appveyor-image]][appveyor-url]
9 [![Test Coverage][coveralls-image]][coveralls-url]
12 const express = require('express')
15 app.get('/', function (req, res) {
16 res.send('Hello World')
24 This is a [Node.js](https://nodejs.org/en/) module available through the
25 [npm registry](https://www.npmjs.com/).
27 Before installing, [download and install Node.js](https://nodejs.org/en/download/).
28 Node.js 0.10 or higher is required.
30 Installation is done using the
31 [`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
37 Follow [our installing guide](http://expressjs.com/en/starter/installing.html)
43 * Focus on high performance
44 * Super-high test coverage
45 * HTTP helpers (redirection, caching, etc)
46 * View system supporting 14+ template engines
48 * Executable for generating applications quickly
52 * [Website and Documentation](http://expressjs.com/) - [[website repo](https://github.com/expressjs/expressjs.com)]
53 * [#express](https://webchat.freenode.net/?channels=express) on freenode IRC
54 * [GitHub Organization](https://github.com/expressjs) for Official Middleware & Modules
55 * Visit the [Wiki](https://github.com/expressjs/express/wiki)
56 * [Google Group](https://groups.google.com/group/express-js) for discussion
57 * [Gitter](https://gitter.im/expressjs/express) for support and discussion
59 **PROTIP** Be sure to read [Migrating from 3.x to 4.x](https://github.com/expressjs/express/wiki/Migrating-from-3.x-to-4.x) as well as [New features in 4.x](https://github.com/expressjs/express/wiki/New-features-in-4.x).
63 If you discover a security vulnerability in Express, please see [Security Policies and Procedures](Security.md).
67 The quickest way to get started with express is to utilize the executable [`express(1)`](https://github.com/expressjs/generator) to generate an application as shown below:
69 Install the executable. The executable's major version will match Express's:
72 $ npm install -g express-generator@4
78 $ express /tmp/foo && cd /tmp/foo
93 View the website at: http://localhost:3000
97 The Express philosophy is to provide small, robust tooling for HTTP servers, making
98 it a great solution for single page applications, web sites, hybrids, or public
101 Express does not force you to use any specific ORM or template engine. With support for over
102 14 template engines via [Consolidate.js](https://github.com/tj/consolidate.js),
103 you can quickly craft your perfect framework.
107 To view the examples, clone the Express repo and install the dependencies:
110 $ git clone git://github.com/expressjs/express.git --depth 1
115 Then run whichever example you want:
118 $ node examples/content-negotiation
123 To run the test suite, first install the dependencies, then run `npm test`:
132 [Contributing Guide](Contributing.md)
136 The original author of Express is [TJ Holowaychuk](https://github.com/tj)
138 The current lead maintainer is [Douglas Christopher Wilson](https://github.com/dougwilson)
140 [List of all contributors](https://github.com/expressjs/express/graphs/contributors)
146 [npm-image]: https://img.shields.io/npm/v/express.svg
147 [npm-url]: https://npmjs.org/package/express
148 [downloads-image]: https://img.shields.io/npm/dm/express.svg
149 [downloads-url]: https://npmjs.org/package/express
150 [travis-image]: https://img.shields.io/travis/expressjs/express/master.svg?label=linux
151 [travis-url]: https://travis-ci.org/expressjs/express
152 [appveyor-image]: https://img.shields.io/appveyor/ci/dougwilson/express/master.svg?label=windows
153 [appveyor-url]: https://ci.appveyor.com/project/dougwilson/express
154 [coveralls-image]: https://img.shields.io/coveralls/expressjs/express/master.svg
155 [coveralls-url]: https://coveralls.io/r/expressjs/express?branch=master