Hasitha N. Liyanage hliyan

1. Basics

<script>
	let name = 'world';
</script>

<h1>Hello {name}!</h1>

mkdir hello
cd hello

npm init
...
test command: jest --coverage
...

Until ECMA6, JavaScript had no classes. It had (and still has) prototypes.
A class is like a mold from which you build an object. A prototype is itself an object.

// think of this as the class AND its constructor
var Person = function() {
  this.canTalk = true;
};

// this is a 'class method'

	<html>

	<body>
	<div>
	<button onClick="onButton()">Hello</button>
	</div>
	<script>
	// credit: https://dbaron.org/log/20100309-faster-timeouts
	const eventQueue = [];

	const TodoTx = require('./src/app/todo-tx');

	// the transmission layer is the app
	const app = new TodoTx();
	app.run();

	const Emitter = require('../../lib/emitter');
	const vorpal = require('vorpal');

	const events = {
	INIT:'init',
	CREATE_TODO: 'CREATE_TODO',
	GET_TODO_LIST: 'GET_TODO_LIST'
	};

	const constants = {

	const Emitter = require('../../lib/emitter');

	const events = {
	INIT:'init',
	CREATE_TODO: 'createTodo'
	};

	const constants = {
	status: {
	TODO: 'TODO',

	// import the engine and shell as two independent modules
	const TodoEngine = require('../engine/todo-engine');
	const TodoShell = require('../shell/todo-shell');

	/**
	* This is the app -- it connects the business logic of the
	* TodoEngine to the presentation capabilities of the TodoShell
	*/
	class TodoTx {
	constructor() {

	// connectivity: ITERATION 1
	var database = new Database('companydb');
	database.connect(function(db) {
	if (db.error) {
	// handle error
	}
	// continue db ops
	});