The new superclass static property provides a reference to a class' superclass.

The superclass static property exists for all subclasses of the Uize base class, and its value is set at the time that a subclass is created by calling the Uize.subclass static method. This static property is, therefore, not inherited in the traditional sense.

The inheritance system of the UIZE JavaScript Framework has been improved with regards to the inheritance of static properties.

Prior to this change, all static properties of a superclass were inherited by a subclass through a copy process. This meant that a property that was a reference to a subclass would be inherited by other subclasses created later. To use an example, if the class Uize.Widget.Button is defined, then there will be a static property Button on the Uize.Widget class. Previously, if you were to create another subclass of Uize.Widget named Uize.Widget.MyClass, then that class would inherit the Button static property, and so the property Uize.Widget.MyClass.Button would be a reference to the Uize.Widget.Button class. This behavior would interfere with the creation of Uize.Widget.MyClass.Button as a subclass of Uize.Widget.MyClass, where the Uize.Widget.MyClass.Button subclass may be nothing like Uize.Widget.Button.

With the new behavior, static properties that are subclasses are not inherited when subclassing - while all other static properties still are. Using the previous example, this means that Uize.Widget.MyClass would no longer end up with a Button static property that looks like it's a subclass - merely because that property existed on the superclass at the time that the subclass was created.