Express NPM | npm.io

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

This project has a Code of Conduct.

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

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

Website and Documentation - [website repo]
#express on Libera Chat IRC
GitHub Organization for Official Middleware & Modules
Visit the Wiki
Google Group for discussion
Gitter for support and discussion

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

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

List of all contributors

TC (Technical Committee)

UlisesGascon - Ulises Gascón (he/him)
jonchurch - Jon Church
wesleytodd - Wes Todd
LinusU - Linus Unnebäck
blakeembrey - Blake Embrey
sheplu - Jean Burellier
crandmck - Rand McKinney
ctcpip - Chris de Almeida

TC emeriti members

dougwilson - Douglas Wilson
hacksparrow - Hage Yaapa
jonathanong - jongleberry
niftylettuce - niftylettuce
troygoode - Troy Goode

Triagers

aravindvnair99 - Aravind Nair
carpasse - Carlos Serrano
CBID2 - Christine Belzie
enyoghasim - David Enyoghasim
UlisesGascon - Ulises Gascón (he/him)
mertcanaltin - Mert Can Altin
0ss - Salah
import-brain - Eric Cheng (he/him)
3imed-jaberi - Imed Jaberi
dakshkhetan - Daksh Khetan (he/him)
lucasraziel - Lucas Soares Do Rego
IamLizu - S M Mahmudul Hasan (he/him)
Sushmeet - Sushmeet Sunger

Emeritus Triagers

AuggieH - Auggie Hudak
G-Rath - Gareth Jones
MohammadXroid - Mohammad Ayashi
NawafSwe - Nawaf Alsharqi
NotMoni - Moni
VigneshMurugan - Vignesh Murugan
davidmashe - David Ashe
digitaIfabric - David
e-l-i-s-e - Elise Bonner
fed135 - Frederic Charette
firmanJS - Firman Abdul Hakim
getspooky - Yasser Ameur
ghinks - Glenn
ghousemohamed - Ghouse Mohamed
gireeshpunathil - Gireesh Punathil
jake32321 - Jake Reed
jonchurch - Jon Church
lekanikotun - Troy Goode
marsonya - Lekan Ikotun
mastermatt - Matt R. Wilson
maxakuru - Max Edell
mlrawlings - Michael Rawlings
rodion-arr - Rodion Abdurakhimov
sheplu - Jean Burellier
tarunyadav1 - Tarun yadav
tunniclm - Mike Tunnicliffe

License

MIT

express framework sinatra web http rest restful router app api

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express v4.21.2

Table of contents

Installation

Features

Docs & Community

Quick Start

Philosophy

Examples

Contributing

Security Issues

Running Tests

People

TC (Technical Committee)

TC emeriti members

Triagers

Emeritus Triagers

License