JavaScript Design Pattern Learning 16--State mode

The key to state mode is to differentiate between the internal and external state of a transaction, and the change of the internal state of a transaction often leads to changes in transaction behavior.

The interesting thing about state mode is that in general we talk about encapsulation, which is the behavior of the precedence wrapper object, not the state of the object. In the state mode, however, the key to the state pattern is to encapsulate each state of the transaction as a separate class, and the behavior associated with that state is encapsulated within the class. At the same time, we can also put the status of the switching rule implementation in the State class, which effectively eliminates the existence of a large number of conditional branch statements.

JavaScript Design Pattern Learning 16--State mode