mb-extend
v0.1.0
Published
Super-lightweight inheritance framework for JavaScript
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mb-extend
Super-lightweight inheritance framework for JavaScript.
Installation
Include mb-extend.js
<script src='/path/to/mb-extend.js></script>
(Optional) Enable unsafe
mode, which makes the framework much easier to use, but may create unintended side-effects if used with other libraries.
mb.extend.unsafe()
Usage
There are no changes to defining normal prototypes/classes
var Vehicle = function(make, model, wheels, doors) {
this.make = make;
this.model = model;
this.wheels = wheels;
this.doors = doors;
};
Vehicle.prototype.identify = function() {
return this.make + ' ' + this.model;
};
Usafe - unsafe mode
Extending a class:
var Car = Vehicle.extend(function(make, model) {
// ...
});
Calling the parent's constructor
var Car = Vehicle.extend(function(make, model) {
this.super(make, model, 4, 4);
});
Usage - safe mode
Extending a class:
var Car = mb.extend(Vehicle, function(make, model) {
// ...
});
Calling the parent's constructor
var Car = mb.extend(Vehicle, function(make, model) {
mb.extend.super(this, make, model, 4, 4);
});
Why Extend?
By extending a class, your subclass is now an instance of both its constructor and its parent's constructor.
var car = new Car('Honda', 'Accord');
console.log( car instanceof Car ); // true
console.log( car instanceof Vehicle ); // true
This means that you will also have access to any methods of the superclass
var car = new Car('Honda', 'Accord');
console.log( car.identify() ); // Honda Accord
Any instances of your subclass will also have access to the parent class via instance.parent
var car = new Car('Honda', 'Accord');
console.log( car.parent == Vehicle ); // true
Contact & License Info
Author: Matthew Balmer
Twitter: @mattbalmer
Website: http://mattbalmer.com
License: MIT