JavaScript Interview Question - What is Design Pattern ? [ Singleton Factory & Observer ]
JavaScript Interview Questions - What is is Design Pattern? [ Singleton Factory & Observer ]
Design Pattern -
In software development, a design pattern is a general reusable solution to a commonly occurring problem within a given context in software design. Design patterns are templates that developers can apply to solve particular problems in a more efficient and organized way. They are not blueprints or finished designs, but rather guidelines for solving certain types of problems.
1. Singleton Pattern:
Ensures a class has only one instance and provides a global point of access to it.
2. Factory Pattern:
Defines an interface for creating objects, but lets subclasses alter the type of objects that will be created.
3. Observer Pattern:
Defines a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
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