1 [](https://expressjs.com/)

2

3 Fast, unopinionated, minimalist web framework for [node](http://nodejs.org).

4

5 [](https://badge.fury.io/js/express)

6 [](https://travis-ci.org/visionmedia/express)

7 [](https://coveralls.io/r/visionmedia/express)

8 [](https://www.gittip.com/dougwilson/)

9

10 ```js

11 var express = require('express')

12 var app = express()

13

14 app.get('/', function (req, res) {

15 res.send('Hello World')

16 })

17

18 app.listen(3000)

19 ```

20

21 **PROTIP** Be sure to read [Migrating from 3.x to 4.x](https://github.com/visionmedia/express/wiki/Migrating-from-3.x-to-4.x) as well as [New features in 4.x](https://github.com/visionmedia/express/wiki/New-features-in-4.x).

22

23 ### Installation

24

25 ```bash

26 $ npm install express

27 ```

28

29 ## Quick Start

30

31 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:

32

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

34

35 ```bash

36 $ npm install -g express-generator@4

37 ```

38

39 Create the app:

40

41 ```bash

42 $ express /tmp/foo && cd /tmp/foo

43 ```

44

45 Install dependencies:

46

47 ```bash

48 $ npm install

49 ```

50

51 Start the server:

52

53 ```bash

54 $ npm start

55 ```

56

57 ## Features

58

59 * Robust routing

60 * HTTP helpers (redirection, caching, etc)

61 * View system supporting 14+ template engines

62 * Content negotiation

63 * Focus on high performance

64 * Executable for generating applications quickly

65 * High test coverage

66

67 ## Philosophy

68

69 The Express philosophy is to provide small, robust tooling for HTTP servers, making

70 it a great solution for single page applications, web sites, hybrids, or public

71 HTTP APIs.

72

73 Express does not force you to use any specific ORM or template engine. With support for over

74 14 template engines via [Consolidate.js](https://github.com/visionmedia/consolidate.js),

75 you can quickly craft your perfect framework.

76

77 ## More Information

78

79 * [Website and Documentation](http://expressjs.com/) - [[website repo](https://github.com/visionmedia/expressjs.com)]

80 * [Github Organization](https://github.com/expressjs) for Official Middleware & Modules

81 * [#express](https://webchat.freenode.net/?channels=express) on freenode IRC

82 * Visit the [Wiki](https://github.com/visionmedia/express/wiki)

83 * [Google Group](https://groups.google.com/group/express-js) for discussion

84 * [Русскоязычная документация](http://jsman.ru/express/)

85 * [한국어 문서](http://expressjs.kr) - [[website repo](https://github.com/Hanul/expressjs.kr)]

86 * Run express examples [online](https://runnable.com/express)

87

88 ## Viewing Examples

89

90 Clone the Express repo, then install the dev dependencies to install all the example / test suite dependencies:

91

92 ```bash

93 $ git clone git://github.com/visionmedia/express.git --depth 1

94 $ cd express

95 $ npm install

96 ```

97

98 Then run whichever example you want:

99

100 $ node examples/content-negotiation

101

102 You can also view live examples here:

103

104 <a href="https://runnable.com/express" target="_blank"><img src="https://runnable.com/external/styles/assets/runnablebtn.png" style="width:67px;height:25px;"></a>

105

106 ## Running Tests

107

108 To run the test suite, first invoke the following command within the repo, installing the development dependencies:

109

110 ```bash

111 $ npm install

112 ```

113

114 Then run the tests:

115

116 ```bash

117 $ npm test

118 ```

119

120 ### Contributors

121

122 * Author: [TJ Holowaychuk](https://github.com/visionmedia)

123 * Lead Maintainer: [Douglas Christopher Wilson](https://github.com/dougwilson)

124 * [All Contributors](https://github.com/visionmedia/express/graphs/contributors)

125

126 ### License

127

128 [MIT](LICENSE)