Express is a minimal and flexible Node.js web 

application framework that provides a robust set 

of features for web and mobile applications.

const express = require('express');

const app = express();

const port = 3000;

const rotas = require('./rotas');

​

app.use(express.json());

app.use(rotas); // app.get('/', (req, res) => {

 // res.send('Hello World!')

//})

​

app.listen(port, () => console.log(`Servidor rodando na porta ${port}!`))

const express = require('express')

const app = express()

const port = 3000

​

app.get('/', (req, res) => {

  res.send('Hello World!')

})

​

app.listen(port, () => {

  console.log(`Example app listening on port ${port}`)

})

1)Express is minimal node.js framework,higher level of abstraction.

2)Express contains robust set of features:complex routing,easier handling of request

and responses,middleware,server-side rendering etc.

3)express allows application into the MVC architecture.

​

//index.js

const express = require('express');

const app = express();

​

app.get('/', (req, res) => {

  res.json({ msg: 'Hello from server' });

});

​

app.listen(4000, () => {

  console.log('Hello from server');

});

​

const express = require('express')

const App = express()

const Port = 3000

​

App.get('/', (req, res) => {

  res.send('Hello World!')

})

​

App.listen(Port, () => {

  console.log(`Express app listening at ${Port}`)

})

const express = require('express');

const app = express();

const port = 3000;

​

app.get('/', (req, res) => {

  res.send('Hello World!')

});

​

app.listen(port, () => {

  console.log(`App listening at http://localhost:${port}`)

});

Express is a minimal and flexible Node.js web application framework

that provides a robust set of features for web and mobile

applications.

$ npm install express --save

const path = require('path');

const methodOverride = require('method-override');

engine = require('ejs-mate');

​

app.engine('ejs', engine);

app.set('views', path.join(__dirname, 'views'));

app.set('view engine', 'ejs');

app.use(express.static(path.join(__dirname, 'public')))

app.use(methodOverride("_method"));

app.use(express.urlencoded({ extended: true }))

app.use(express.json());

​