Notes

Using Classes in ES6

• Aggregation : When you have instance variables of objects and not just primitive types.

• Steps to Writing a Class:
  • Create your class.
  • Add a constructor.
  • Store instance variables into your constructor.
  • Create instance methods.
  • Use aggregation to create instance variables of objects.
  • Refactor by finding duplicate behavior and creating a parent class to use inheritance.

Find duplicate behavior between classes. Then, extract the common pieces to make a parent class.