Constructor Pattern Implementation

constructor.js

/* We will use an IIFE wrapping-function to keep the global scope clean and 
to prevent things from being created in the global scope. We will use strict mode in a controlled enviroment, 
also without triggering it in the global scope. */
    



var Todo = (function() {
	'use strict';

	function todo(name) {
		// Enforces NEW even if called as an function
		if (!(this instanceof todo)) {
			return new todo();
		}
		// Adds the name of the object created and returned to the passed name.
		this.name = name;
		// By default completed is set to false.
		this.completed = false;
	}

	/* Unlike constructor function todo() prototype methods are not initialized 
	to every single instance of object created.*/
	todo.prototype.complete = function() {
		console.log('Completed!');
		this.completed = true;
	}
	/* This method is just loaded once and all objects are linked to it. 
	So all instances have access to this method but not copies of it. */
	todo.prototype.toString = function() {
		return this.name;
	}
	/* Return Object in case you are booting it as module in 
	something like an angular application */
	return todo;

}());



// Testing Module 
var t1 = new todo('Fix bug #2342');
var t2 = new todo('Feature #23');
var t3 = new todo('Call XYZ');
t1.complete();
console.log(t1);
t1.toString()