1/* ====== create node.js server with express.js framework ====== */
2// dependencies
3const express = require("express");
4
5const app = express();
6
7app.get("/", (req, res) => {
8   res.send("This is home page.");
9});
10
11app.post("/", (req, res) => {
12   res.send("This is home page with post request.");
13});
14
15// PORT
16const PORT = 3000;
17
18app.listen(PORT, () => {
19   console.log(`Server is running on PORT: ${PORT}`);
20});
21
22
23// ======== Instructions ========
24// save this as index.js
25// you have to download and install node.js on your machine
26// open terminal or command prompt
27// type node index.js
28// find your server at http://localhost:3000

1// this is your code
2// ZDev1#4511 on discord if you want more help!
3// first you should install express in the terminal
4// `npm i express`.
5const express = require('express');
6const app = express();
7
8// route
9app.get('/', (req,res)=>{
10  // Sending This is the home page! in the page
11  res.send('This is the home page!');
12});
13
14// Listening to the port
15let PORT = 3000;
16app.listen(PORT)
17
18// FINISH!

1const express = require('express');
2const app = express();
3const PORT = process.env.PORT || 3000;
4
5app.get('/', (req, res) => {
6  res.send('<h1>Some HTML</h1>');
7  res.send('<p>Even more HTML</p>');
8});
9
10app.listen(PORT, () => console.log(`Server is listening on port ${PORT}`));

1// npm init
2// npm i express
3
4const express = require('express');
5const server = express();
6
7const PORT = 3000;
8
9// Body parser
10server.use(express.json());
11
12// Homme page
13server.get('/', (req, res) => {
14  return res.send("<h1 style='text-align: center;'>Hello,<br />from the Express.js server!</h1>");
15})
16
17// About page
18server.get('/about', (req, res) => {
19  return res.send('<h2 style="text-align:center">About us</h2>');
20})
21
22// 404 page
23server.use((req, res, next) =>{
24  res.status(404);
25
26  // respond with html page
27  if (req.accepts('html')) {
28    res.sendFile(__dirname + '/error404.html');
29    return;
30  }
31  // respond with json
32  else if (req.accepts('json')){
33    res.send({
34      status: 404,
35      error: 'Not found'
36    });
37    return;
38  }
39  // respond with text
40  else {
41    res.type('txt').send('Error 404 - Not found');
42  }
43});
44
45// Listening to the port
46server.listen(PORT, () => {
47  console.log(`Server is running on port ${PORT}`);
48});

1You can run the application generator with the npx command (available in Node.js 8.2.0).
2$ npx express-generator
3For earlier Node versions, install the application generator as a global npm package and then launch it:
4$ npm install -g express-generator
5For example, the following creates an Express app named myapp. The app will be created in a folder named myapp in the current working directory and the view engine will be set to Pug:
6$ express --view=pug myapp
7
8   create : myapp
9   create : myapp/package.json
10   create : myapp/app.js
11   create : myapp/public
12   create : myapp/public/javascripts
13   create : myapp/public/images
14   create : myapp/routes
15   create : myapp/routes/index.js
16   create : myapp/routes/users.js
17   create : myapp/public/stylesheets
18   create : myapp/public/stylesheets/style.css
19   create : myapp/views
20   create : myapp/views/index.pug
21   create : myapp/views/layout.pug
22   create : myapp/views/error.pug
23   create : myapp/bin
24   create : myapp/bin/www
25Then install dependencies:
26$ cd myapp
27$ npm install
28On MacOS or Linux, run the app with this command:
29$ DEBUG=myapp:* npm start
30On Windows Command Prompt, use this command:
31> set DEBUG=myapp:* & npm start
32On Windows PowerShell, use this command:
33PS> $env:DEBUG='myapp:*'; npm start
34Then load http://localhost:3000/ in your browser to access the app.
35The generated app has the following directory structure:
36.
37├── app.js
38├── bin
39│   └── www
40├── package.json
41├── public
42│   ├── images
43│   ├── javascripts
44│   └── stylesheets
45│       └── style.css
46├── routes
47│   ├── index.js
48│   └── users.js
49└── views
50    ├── error.pug
51    ├── index.pug
52    └── layout.pug
53
547 directories, 9 files
55The app structure created by the generator is just one of many ways to structure Express apps. Feel free to use this structure or modify it to best suit your needs.

1const http = require('http')
2const express = require('express')
3
4const app = express()
5const server = http.Server(app)
6app.set('port', 8888)
7server.listen(8888)
8
9app.get('/', (req, res) => {
10  res.json({teste: true})
11})
12