why should I use express.js

/* ====== 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

express in node js

$ npm init --y //add the package.json file

$ npm install express --no-save

const express = require('express')
const app = express()

//cors to fix cors origin, body-parser to fix the post value on the server
const cors = require('cors');
const bodyParser = require('body-parser');
app.use(cors());
app.use(bodyParser.json());

const port = 3000

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

router.get('/admin/:id?', (req, res) => {
  let id = req.params.id;
}

app.post('/admin', (req, res) => {
  const user = req.body.user;
  res.send('Hello World!', user)
})

app.listen(port, () => {
  console.log(`Example app listening at http://localhost:${port}`)
})

Posted by: Guest on August-28-2021

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