express Documentation

Fast, unopinionated, minimalist web framework for node.

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File: examples/README.md

Express examples

This page contains list of examples using Express.

File: Readme.md

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

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js
import express from 'express'

const app = express()

app.get('/', (req, res) => {
  res.send('Hello World')
})

app.listen(3000, () => {
  console.log('Server is running on http://localhost:3000')
})

Installation

This is a Node.js module available through the
npm registry.

Before installing, download and install Node.js.
Node.js 18 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:

bash
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

PROTIP Be sure to read the migration guide to v5

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:

bash
npm install express-generator@4

Create the app:

bash
express /tmp/foo && cd /tmp/foo

Install dependencies:

bash
npm install

Start the server:

bash
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 @ladjs/consolidate,
you can quickly craft your perfect framework.

Examples

To view the examples, clone the Express repository:

bash
git clone https://github.com/expressjs/express.git --depth 1 && cd express

Then install the dependencies:

bash
npm install

Then run whichever example you want:

bash
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.

This project has a Code of Conduct. By participating, you are expected to uphold this code.

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:

bash
npm install

Then run npm test:

bash
npm test

Current project team members

For information about the governance of the express.js project, see GOVERNANCE.md.

The original author of Express is TJ Holowaychuk

List of all contributors

TC (Technical Committee)

TC emeriti members

TC emeriti members

Triagers

Triagers emeriti members

Emeritus Triagers

License

MIT

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