Architecture & LLD Preview
Memento Pattern
Capture and externalize an object's internal state so that it can be restored later without violating encapsulation.
Memento pattern exports read-only state snapshot tokens that only the editor can inspect and restore.
Core Design Challenge
"How do we save snapshots of a rich text editor canvas to support undo actions without exposing private text fields?"
What You'll Learn:
- ✦Capturing and restoring an object's internal state history
- ✦Maintaining encapsulation by keeping state snapshots opaque
- ✦Supporting undo/redo stacks by saving state tokens
- ✦Preventing external classes from inspecting private data