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
