OOP in JS

OOP is a programming paradigm based on the concept of "objects", which can contain data and code: data in the form of fields (often known as attributes or properties), and code, in the form of procedures (often known as methods).

What is OOP?

4 Pillars of OOP

Encapsulation
- Reduce complexity + increase reusability
Abstraction
- Reduce complexity + isolate impact of change
Inheritance
- Eliminate redundant code
Polymorphism
- Eliminate ugly if-else/switch statements

Example: localStorage

Encapsulation (info hiding)

Exposing only the minimum required by a public interface

Keeping the data and the code together in a unified way

Benefits

Code refactoring
Preventing misuse of object's state
Better modularity

Example: Question