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Answers for "hello world express"

Javascript
53

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
49

express hello world

//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
Posted by: Guest on July-17-2020
2

express hello world example

const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const cors = require('cors')
const bcrypt = require('bcrypt')
const jwt = require('jsonwebtoken')

//connecting to my cluster database online
mongoose.connect('mongodb+srv://username:[email protected]/databasename?retryWrites=true&w=majority', {useUnifiedTopology: true, useNewUrlParser: true, useCreateIndex: true });

//initializing the app 
const app = express()

//required middlware
app.use(cors())
app.use(bodyParser.json())
app.use(bodyParser.urlencoded({ extended: false }))

//Setting default port for the backend server
const PORT = process.env.PORT || 3333
// run in the terminal : export PORT=3333 {{justincase}}


//Test server page running
app.get('/', (req, res) => {
    res.send(`Hello World ,,,, backend is running on port ${PORT}`)
})

// Console log for terminal for server listening
app.listen(PORT, (err) => {
    if(err) return console.log(err);
    console.log(`Server listening on port ${PORT}`)
})
Posted by: Guest on June-25-2021
6

express hello world

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}`)
})
Posted by: Guest on February-28-2021
6

require express server.js

const express = require('express')const app = express() app.get('/', function (req, res) {  res.send('Hello World')}) app.listen(3000)
Posted by: Guest on March-19-2020

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