Making a "class" in JavaScript. What we typically see when we code up the M in MVC.

constructor-prototype.js

/** ****************************************
 * Constructor for say hi feature.
 * @constructor SayHiConstructor
 * @returns {object}
 */
function SayHiConstructor() {
	this.greeting = "Basic module says, 'hallo'!"
}
SayHi.prototype.sayHi = function sayHi() {
	this.writeToConsole());
}
SayHi.prototype.writeToConsole = function writeToConsole() {
	console.log(this.greeting);
}
// module.exports = SayHiConstructor;

/** 
 * Pros: memory effecient for programs
 * Cons: dependency on implicit environment, no privates, more complex mental model, 
 * 	 mutable properties
 * 
 * Gang of Four says ...
 * 1) "Program to an 'interface', not an 'implementation'."
 * 2) "Favor 'object composition' over 'class inheritance'."
 * 
 * This method does not normally adhere to these principles
 */