The document defines several JavaScript concepts including classes, inheritance, and object-oriented programming principles. It defines an Animal class that is extended by a Snake class which overrides the move method. It also defines SceneMain class that extends an enchant.Scene class, a constructor function, and a Hoge class with a getter method to return the name property.
The document defines several JavaScript concepts including classes, inheritance, and object-oriented programming principles. It defines an Animal class that is extended by a Snake class which overrides the move method. It also defines SceneMain class that extends an enchant.Scene class, a constructor function, and a Hoge class with a getter method to return the name property.