opps.js is a simple OOP library for Javascript.
- Supports methods and attributes inheritance .
- Supports getters and setters inheritance. ([Defining getters and setters] (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Defining_getters_and_setters))
- Supports calling the base class constructor method through "this.__base__".
// Class Animal
// Implement the constructor method of the class Animal
function Animal() {
console.log("Animal constructor is called");
}
// Assign attributes and methods to Animal
Animal = Animal.Extend(Object, {
_color: '',
setColor: function(color) {
this._color = color;
},
getColor: function() {
return this._color;
}
});
// Class Bird
function Bird() {
// Optional: call the base class constructor.
// Please note that the __base__ is added to this object automatically.
this.__base__();
console.log("Bird constructor is called");
}
// Extend Animal, add more methods or/and attributes
Bird = Bird.Extend(Animal, {
fly: function() {
// ....
}
});
b = new Bird();
b.setColor('red'); // Calling the inherited method.
console.log(typeof b);
console.log(b instanceof Bird);
console.log(b instanceof Animal);
Animal constructor is called
Bird constructor is called
object
true
true