# Class.js

Summary

Class.js |
Constructor |
OpenLayers.Class | Base class used to construct all other classes.
Functions |
extend | Copy all properties of a source object to a destination object.

### Constructor

### OpenLayers.Class

Base class used to construct all other classes. Includes support for multiple inheritance.

This constructor is new in OpenLayers 2.5. At OpenLayers 3.0, the old syntax for creating classes and dealing with inheritance will be removed.

#### To create a new OpenLayers-style class, use the following syntax

>     var MyClass = OpenLayers.Class(prototype);

To create a new OpenLayers-style class with multiple inheritance, use the following syntax:

>     var MyClass = OpenLayers.Class(Class1, Class2, prototype);

Note that instanceof reflection will only reveal Class1 as superclass.

### Functions

### extend

Copy all properties of a source object to a destination object. Modifies the passed in destination object. Any properties on the source object that are set to undefined will not be (re)set on the destination object.

#### Parameters

destination | {Object} The object that will be modified
source | {Object} The object with properties to be set on the destination

#### Returns

{Object} The destination object.

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