Day 27 || Express js || Express Framework || Get method in Express || Post Method in Express

 Node.js Topics

Day 27:

• Express Framework

• Get

• Post

Express.js

const express = require('express');

const callingData = require('./Data.js')

const app = express()

const bodyParser = require('body-parser')

app.use(bodyParser.json())

app.use(bodyParser.urlencoded({extended:false}))

app.get('/',(req,res)=>{

res.send("Hello, Hema coding school");

})

app.get('/about',(req,res)=>{

    res.send("About , Hema coding school")

})

app.get('/item',(req,res)=>{

    res.send(`

    <h1>Hema Codning School</h1>

    <h2>${callingData[0].id}</h2>

    <h2>${callingData[0].name}</h2>

    <h2>${callingData[1].id}</h2>

    <h2>${callingData[1].name}</h2>

    <h2>${callingData[2].id}</h2>

    <h2>${callingData[2].name}</h2>

    `)

})

app.post('/api',(req,res)=>{

    newData={

        id:req.body.id,

        name: req.body.name

    }

    callingData.push(newData)

    res.json(callingData)

})

const PORT = 3000;

const HOSTNAME = "127.0.0.1";

const BACKLOG = 551;

app.listen(PORT, HOSTNAME, BACKLOG,()=>{

    console.log(`Server is running at http://${HOSTNAME}:${PORT}`)

})

Data.js

const items = [

    {

      id: 1,

      name: "Hema",

    },

    {

      id: 2,

      name: "Mahesh",

    }

   

  ];

  module.exports = items

Interview Questions:

1. How does routing work in Express.js?

2. What is middleware in Express and how is it used in the context of a GET request?

3. How do you handle a POST request in Express?