Flutter for Beginners

Mixins – adding behavior to a class

In OOP, mixins are a way to include functionalities on a class without the need for associations between the parts, such as inheritance.

The most common contexts where mixins can be used are in places where multiple inheritances may be needed, as it is an easy way for classes to use common functionality.

In Dart, there are several ways in which to declare a mixin:

• By declaring a class and using it as a mixin, allowing it to also be used as an object
• By declaring an abstract class, allowing it to be used as a mixin or to be inherited, but not instantiated
• By declaring it as a mixin, allowing it to be used only as a mixin

No matter how you declare a mixin, it can also be used as an interface, since it ...