basic express app

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

Posted by: Guest on January-13-2021

//to run : node filename.js 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 at http://localhost:${port}`)) //visit localhost:3000 // assuming you have done 1) npm init 2) npm install express

const express = require('express'); const app = express(); const PORT = process.env.PORT || 3000; app.get('/', (req, res) => { res.send('<h1>Some HTML</h1>'); res.send('<p>Even more HTML</p>'); }); app.listen(PORT, () => console.log(`Server is listening on port ${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 at http://localhost:${port}`))

## Command $ npx express-generator : 'For earlier Node versions, install the application generator as a global npm package and then launch it': $ npm install -g express-generator $ express ## Display the command options with the -h option: $ express -h

basic server const express =require('express'); const app = express(); const PORT = 5000; app.get('/',(req,res)=>{ res.json({message: 'Welcome to the backend'}) }) app.listen(PORT ,()=>console.log(`Connected to ${PORT}`)

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