require express

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//to run : node filename.js
2const express = require('express')
3const app = express()
4const port = 3000
5
6app.get('/', (req, res) => res.send('Hello World!'))
7
8app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))
9
10//visit localhost:3000
11// assuming you have done 1) npm init 2) npm install express

1const express = require('express')const app = express() app.get('/', function (req, res) {  res.send('Hello World')}) app.listen(3000)

1const express = require('express')