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1[![Express Logo](https://i.cloudup.com/zfY6lL7eFa-3000x3000.png)](http://expressjs.com/)
2
3 Fast, unopinionated, minimalist web framework for [node](http://nodejs.org).
4
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]
10
11```js
12const express = require('express')
13const app = express()
14
15app.get('/', function (req, res) {
16 res.send('Hello World')
17})
18
19app.listen(3000)
20```
21
22## Installation
23
24This is a [Node.js](https://nodejs.org/en/) module available through the
25[npm registry](https://www.npmjs.com/).
26
27Before installing, [download and install Node.js](https://nodejs.org/en/download/).
28Node.js 0.10 or higher is required.
29
30Installation is done using the
31[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
32
33```bash
34$ npm install express
35```
36
37Follow [our installing guide](http://expressjs.com/en/starter/installing.html)
38for more information.
39
40## Features
41
42 * Robust routing
43 * Focus on high performance
44 * Super-high test coverage
45 * HTTP helpers (redirection, caching, etc)
46 * View system supporting 14+ template engines
47 * Content negotiation
48 * Executable for generating applications quickly
49
50## Docs & Community
51
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
58
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).
60
61### Security Issues
62
63If you discover a security vulnerability in Express, please see [Security Policies and Procedures](Security.md).
64
65## Quick Start
66
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:
68
69 Install the executable. The executable's major version will match Express's:
70
71```bash
72$ npm install -g express-generator@4
73```
74
75 Create the app:
76
77```bash
78$ express /tmp/foo && cd /tmp/foo
79```
80
81 Install dependencies:
82
83```bash
84$ npm install
85```
86
87 Start the server:
88
89```bash
90$ npm start
91```
92
93 View the website at: http://localhost:3000
94
95## Philosophy
96
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
99 HTTP APIs.
100
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.
104
105## Examples
106
107 To view the examples, clone the Express repo and install the dependencies:
108
109```bash
110$ git clone git://github.com/expressjs/express.git --depth 1
111$ cd express
112$ npm install
113```
114
115 Then run whichever example you want:
116
117```bash
118$ node examples/content-negotiation
119```
120
121## Tests
122
123 To run the test suite, first install the dependencies, then run `npm test`:
124
125```bash
126$ npm install
127$ npm test
128```
129
130## Contributing
131
132[Contributing Guide](Contributing.md)
133
134## People
135
136The original author of Express is [TJ Holowaychuk](https://github.com/tj)
137
138The current lead maintainer is [Douglas Christopher Wilson](https://github.com/dougwilson)
139
140[List of all contributors](https://github.com/expressjs/express/graphs/contributors)
141
142## License
143
144 [MIT](LICENSE)
145
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
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