Hassan Algoz HassanAlgoz

Node.js HTTP Server

YouTube Lesson by Hassan Algoz.

let http = require('http')

let server = http.createServer(function(req, res) {

    // req: methods and properties for request
    // res: method and properties for response

Tutorial by: Hassan Algoz
YouTube Channel: https://www.youtube.com/channel/UCaD5hX1OzVezzbIqHm3VHsQ
Vocabulary: API, fetch, XMLHttpRequest, promises, GET, HTTP, asynchronous.
- json (JSON): JavaScript Object Notation

fetch is the modern equivalent to XMLHttpRequest. fetch uses promises.

A function that uses promises can chain .thens to allow for asynchronous flow that listens for when the task is completed, rather than wait.

	sudo apt-get install linux-headers-$(uname -r) build-essential dkms

	VERSION=6.1.34
	wget http://download.virtualbox.org/virtualbox/$VERSION/VBoxGuestAdditions_$VERSION.iso
	sudo mkdir /media/VBoxGuestAdditions
	sudo mount -o loop,ro VBoxGuestAdditions_$VERSION.iso /media/VBoxGuestAdditions
	sudo sh /media/VBoxGuestAdditions/VBoxLinuxAdditions.run
	rm VBoxGuestAdditions_$VERSION.iso
	sudo umount /media/VBoxGuestAdditions
	sudo rmdir /media/VBoxGuestAdditions

	// Arrow Functions
	function isEven(number) {
	return (number % 2 === 0);
	}
	let isEven = function (number) {
	return (number % 2 === 0);
	}
	// drop the 'function' keyword, and append '=>' after function parameters
	let isEven = (number) => {
	return (number % 2 === 0);

	const http = require('http')
	// The `url` module splits up a web address into readable parts
	const url = require('url')

	http.createServer((req, res) => {
	res.writeHead(200, {'Content-Type': 'text/html'})

	// url.parse() will return a URL object with each part of the address as properties

	let urlObject = url.parse(req.url, true)

	// Callback Functions: passing functions to functions

	function processArray(array, func) {
	let resultArray = []
	for(let i = 0; i < array.length; i++) {
	resultArray[i] = func(array[i])
	}
	return resultArray
	}

	console.log('script-DOM.js') // DOM: Document Object Model

	// Selection by Id
	let title = document.getElementById("main-title")
	title.innerHTML += " Hello World"; // Modifying Text

	// Also Selection by Id, using CSS selectors
	let subtitle = document.querySelector('#subtitle')

	// The querySelector(string) is powerful in that you can

	window.addEventListener('load', function() {

	// Recursion and loops (repetition)

	function greetings(str) {
	console.log(str)
	console.log(str)
	console.log(str)
	}

	window.addEventListener('load', function() {

	console.log("Hello from script.js")

	// Functions
	let a = Math.max(10, 43)

	console.log( myMax(99, 45) )
	console.log( myMin(34, 12) )

	developer tools > console
	4 + 5
	9 * 2
	12 / 4
	2 ** 3
	true && false
	true \|\| false

	age = 19
	name = "Hasssan"