Introduction
Structural design patterns are used to solve problems related to the composition of objects and their relationships. They help to organize code into larger structures, making it easier to maintain and modify.
Concerned with how objects are made up and simplify relationships between objects.
The four most common structural design patterns in JavaScript are:
- Adapter Pattern: The Adapter pattern allows objects with incompatible interfaces to work together. It acts as a bridge between two incompatible interfaces, making them compatible.
- Decorator Pattern: The Decorator pattern adds functionality to an object dynamically without changing its original structure. It is used to extend the functionality of an object at runtime.
- Facade Pattern: The Facade pattern provides a simplified interface to a complex system. It acts as a high-level interface that makes it easier to use a complex system by providing a simplified interface to it.
- Flyweight Pattern: The Flyweight Pattern is useful when an application needs to create a large number of similar objects that differ only in some small aspects. By sharing the common properties, it reduces the memory footprint of an application and improves performance.
Adapter Pattern
The Adapter Pattern is a structural design pattern that allows objects with incompatible interfaces to work together by creating an adapter that acts as an intermediary between the two objects. The adapter translates the interface of one object into an interface that the other object can understand.
Adapter Pattern introduces an intermediary piece of code that makes two parts of a system compatible with one another.
Let’s say we have an existing class that provides a certain interface, but we want to use that class in a new context where it needs to conform to a different interface. We can use the Adapter Pattern to create a new class that adapts the existing class to the new interface.
Now understand Adapter Pattern with an example and here we are going to explain an example in steps: