Understanding the Memento Pattern
The Memento pattern consists of three key components: the Originator, the Memento, and the Caretaker.
- Originator: This is the object whose state needs to be saved and restored. It creates a Memento object to capture its state and can also restore its state from a Memento.
- Memento: The Memento is an immutable object that stores the state of the Originator. It only allows the Originator to access its content, ensuring that the state remains encapsulated.
- Caretaker: The Caretaker is responsible for keeping track of multiple Mementos. It can save and retrieve Mementos to and from an Originator.
Memento Method – JavaScript Design Pattern
A behavioral design pattern in JavaScript called Memento focuses on externalizing and capturing an object’s internal state so that it can later be restored. When you need to add features like undo/redo functionality, history tracking, or reverting an item to a former state, this pattern is quite helpful.
Important Topics for the Memento Method
- Understanding the Memento Pattern
- Example
- Advantages of Memento Method:
- Disadvantages of Memento Method:
- Conclusion: