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    Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
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    Express Logo

    Fast, unopinionated, minimalist web framework for node.

    NPM Version NPM Downloads Linux Build Windows Build Test Coverage

    var express = require('express')
    var app = express()
    
    app.get('/', function (req, res) {
      res.send('Hello World')
    })
    
    app.listen(3000)
    

    Installation

    $ npm install express
    

    Features

    • Robust routing
    • Focus on high performance
    • Super-high test coverage
    • HTTP helpers (redirection, caching, etc)
    • View system supporting 14+ template engines
    • Content negotiation
    • Executable for generating applications quickly

    Docs & Community

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

    ###Security Issues

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

    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
    

    Philosophy

    The Express philosophy is to provide small, robust tooling for HTTP servers, making it a great solution for single page applications, web sites, 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 git://github.com/expressjs/express.git --depth 1
    $ cd express
    $ npm install
    

    Then run whichever example you want:

    $ node examples/content-negotiation
    

    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 TJ's Gratipay

    The current lead maintainer is Douglas Christopher Wilson Doug's Gratipay

    List of all contributors

    License

    MIT

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