Express Module
What you’ll learn
- How to import and initialize the Express module.
- What key exports are available from
express. - How to combine app factory, routers, and body parsers.
- How to structure a clean Express bootstrap file.
Basic module usage
javascript
const express = require('express');
const app = express();
const router = express.Router();1
Create app and mount parsers
javascript
const express = require('express');
const app = express();
app.use(express.json());
app.use(express.urlencoded({ extended: true }));📋 Common Express exports
| Export | Purpose | Example use |
|---|---|---|
express() | Create app instance | const app = express() |
express.Router() | Create modular router | const router = express.Router() |
express.json() | Parse JSON request body | app.use(express.json()) |
express.urlencoded() | Parse URL-encoded form data | app.use(express.urlencoded({ extended: true })) |
express.static() | Serve static files | app.use(express.static('public')) |
❓ FAQ
It is the package you import with require('express') or import express from 'express' to create apps and middleware.
It returns an application instance (app) used for routes, middleware, settings, and server startup.
Common ones include express.json(), express.urlencoded(), and express.static().
Yes. express.Router() is exported by the same module and creates modular routing stacks.
No. Use only what your app needs for cleaner and more maintainable setup.
Did you know?
The express module exports factory APIs like express(), express.Router(), and built-in middleware helpers.
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