Package Exports

origin

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (origin) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Origin

This library provides an easily extendable base class that comes with some very convenient built-in instance methods and class methods. It differs from other implementations of extend in that it makes adding class methods very easy and provides a parent() method that makes calling methods from parent classes easy and reliable.

Installation

npm install origin

Quick Start/Example

First, require Origin

var Origin = require('origin');

Use the extend class method on Origin or any subclass of origin to create a new class.

var MyClass = Origin.extend({
  
  // This function will become the constructor for your
  // new class
  initializer: function(arg1, arg2) {
    ...
  },
  
  // You can define the variables and methods that will be
  // present in each instance of your new class. Sublasses
  // of this class, created using MyClass.extend() will
  // persist these these properties unless they are overridden
  // by the subclass.
  properties : {
    
    someVariable : "some value",
    
    someFunction : function(arg1, arg2) {
      
      // All instances have a cls method that will return
      // the class of the object.
      if (arg1 instanceof this.cls()) {
        ...
      }
      
    }
    
    someOtherFunction : function(arg1) {
      
      // All objects that extend from Origin have a parent
      // method that allows you to call a method of any parent
      // class.
      this.parent(ParentClass).someOtherFunction(arg1);
      ...

    }
  },
  
  classProperties : {
    
    // You can easily attach class methods to any class you define.
    // Subclasses of this class, created with MyClass.extend(), will
    // persist these class methods unless they're overriden by a 
    // subclass.
    aClassMethod : function(arg1) {
      ...
    }
  }
});

var myClassInstance = new MyClass(arg1, arg2);

The Origin Class Documentation

+ extend(options)

var Subclass = Class.extend({ initializer : function() { ... }, 
                              properties : { ... },
                              classMethods : { ... }
                            });

Exactly as Origin.extend() allows you to create a subclass of Origin, calling the extend class method on any subclass of Origin creates a subclass of that class. extend() takes a single dictionary that may contain an "initializer" function (the constructor for the resulting class), a "properties" object containing values or methods to attach to instances of your new class, and a "classProperties" object that contains any class methods that you'd like attached to your new class.

+ inheritsFrom(cls)

if ( Class.inheritsFrom(OtherClass) ) {
  ...
}

Returns true if the class you're calling inheritsFrom on is a subclass of the class that you pass in as an argument. Returns false otherwise.

+ superclass()

var ParentClass = Class.superclass();

Returns the parent class.

- parent(cls)

var MyClass = ParentClass.extend({
  properties : {
    myFunction : function(arg1) {
      ...
      this.parent(ParentClass).myFunction(arg1);
      ...
    }
  }
});

Takes a superclass of the current object's class and returns a dictionary with methods corresponding to the methods available in that superclass. Calling one of those methods behaves as expected and maintains the correct context of 'this'.

- cls()

var MyClass = ParentClass.extend({
  properties : {
    isAParentClassObject : function(arg1) {  
      if (arg1.cls().inheritsFrom(ParentClass)) {
        return true;
      }
      else {
        return false;
      }
    }
  }
});

Returns the class of the current object.

License

Released under the MIT license. See file called LICENSE for more details.