install express code example

Example 1: install express

$ npm install express --save

Example 2: express.js server

/* ====== create node.js server with express.js framework ====== */
// dependencies
const express = require("express");

const app = express();

app.get("/", (req, res) => {
   res.send("This is home page.");
});

app.post("/", (req, res) => {
   res.send("This is home page with post request.");
});

// PORT
const PORT = 3000;

app.listen(PORT, () => {
   console.log(`Server is running on PORT: ${PORT}`);
});


// ======== Instructions ========
// save this as index.js
// you have to download and install node.js on your machine
// open terminal or command prompt
// type node index.js
// find your server at http://localhost:3000

Example 3: install express globally

$ npm install express --no-save

Example 4: install express

npm i express

Example 5: npm express

$ npm install express

Example 6: npm express

// npm install express
const express = require('express');
const app = express();

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

app.listen(3000,()=>{
 console.log("starting...");
});