juniorDesign Patterns
What is the Facade Pattern?
Updated Apr 28, 2026
Short answer
A structural pattern that provides a simplified interface to a library, a framework, or any other complex set of classes.
Deep explanation
A facade is a class that provides a simple interface to a complex subsystem. It doesn't hide the subsystem completely but provides an easy-to-use shortcut for the most common use cases, reducing coupling between client code and the subsystem.
Real-world example
Providing a simple order.checkout() method that internally interacts with Inventory, Billing, and Shipping subsystems.
Common mistakes
- Creating a Facade that becomes a God object tightly coupled to every class in the application.
Follow-up questions
- Does a Facade prevent access to the underlying subsystem?