Javascript is the most confusing programming language, it does not have built-in OOP elements like class, private, public, static properties, methods. Fortunately, Javascript flexibility allows us to customize and bend it to our needs. This project will show you how to implement OOP style in Javascript. You will see how class, private, public, static members are introduced into pure Javascript, Coffeescipt - another way of writing Javascript. Furthermore, you will see how a nodejs module can be used as a class as well as a singleton
Detail sample implementation is inside src/ directory
Running the test by mocha or npm test offers an insight into the implementation
Coffeescript class
private properties/methods
✓ cannot be accessed from outside
public properties/methods
✓ can be accessed from outside
✓ can access private properties
✓ can access private methods
static members
static methods
✓ can be access directly via class name
✓ cannot be called from object instance
public static properties
✓ can be access directly via class name from outside
private static properties
✓ cannot be access from outside
✓ can be access via a public static method
Node module as a singleton
private properties/methods
✓ cannot be accessed from outside
public properties/methods
✓ can be accessed from outside
✓ can access private properties
✓ can access private methods
pure Javascript class
private properties/methods
✓ cannot be accessed from outside
public properties/methods
✓ can be accessed from outside
✓ can access private properties
✓ can access private methods
static method
✓ can be access directly via class name
✓ cannot be called from object instance
Node module as both class and singleton
as normal class
private properties/methods
✓ cannot be accessed from outside
public properties/methods
✓ can be accessed from outside
✓ can access private properties
✓ can access private methods
static method
✓ can be access directly via class name
✓ cannot be called from object instance
as singleton
private properties/methods
✓ cannot be accessed from outside
public properties/methods
✓ can be accessed from outside
✓ can access private properties
✓ can access private methods
relationship between members of singleton and normal class
singleton
✓ cannot access instance private members
✓ cannot use instance public members
class instance
✓ cannot access singleton private members
✓ cannot use singleton public members