Introduction

Introduction

Object-Oriented Programming (OOP) is a programming paradigm that organizes code around objects — data structures that combine related properties and behaviors together.

Why OOP?

As applications grow, code becomes harder to manage. OOP helps by:

• Encapsulation — grouping related data and functions into objects
• Reusability — creating blueprints (classes) to make many objects of the same type
• Inheritance — sharing code between similar object types
• Organization — structuring code in a way that mirrors the real world

Objects in the Real World

Think of a car. It has:

Properties (data)	Methods (actions)
color, make, speed	accelerate(), brake(), honk()

In JavaScript, that looks like:

var car = {
    color: 'red',
    make: 'Toyota',
    speed: 0,
    accelerate: function() {
        this.speed += 10;
    },
    brake: function() {
        this.speed -= 10;
    }
};

What You Will Learn

In this series, you will learn:

• Object literals — the simplest way to create objects
• Classes — blueprints for creating multiple objects
• Constructors — initializing objects with custom data
• Methods and method chaining
• Inheritance — sharing code between classes
• Prototypes — how JavaScript implements OOP under the hood

Key Takeaways

• OOP organizes code into objects that combine data (properties) and behavior (methods)
• JavaScript supports OOP through both object literals and classes
• Understanding OOP is essential for building large, maintainable applications
• This series covers both the modern class syntax and the prototype-based foundation