Understanding What is Object Oriented Programming (OOP) - Javascript for Beginners - Lesson 3

In this detailed tutorial, we dive into the core principles of Object-Oriented Programming (OOP) within the context of JavaScript. As the third lesson in our series, this video aims to build upon the foundational knowledge of JavaScript by introducing OOP, a programming paradigm that is pivotal for developing robust and scalable web applications. This lesson is designed for individuals who have a basic understanding of JavaScript and are looking to enhance their skills by learning about the object-oriented approach to programming.

Object-Oriented Programming (OOP) is a programming paradigm based on the concept of "objects", which can contain data, in the form of fields, often known as attributes or properties, and code, in the form of procedures, often known as methods. OOP models real-world entities as software objects, which have some state and behavior. This approach to programming is highly beneficial for managing and organizing complex software systems, making it easier to keep code DRY (Don't Repeat Yourself), reusable, and modular.

JavaScript, being a versatile language, supports OOP with a prototype-based model. Unlike classical OOP languages where classes are defined, JavaScript uses prototypes to create objects and implement inheritance. This lesson will clarify these concepts, explaining how prototypes work and how they are used to create object hierarchies and inheritance in JavaScript, providing the flexibility to model real-world entities more efficiently.

We'll start by exploring the basics of creating objects in JavaScript using constructor functions and the new ES6 class syntax. Understanding these concepts is crucial for defining custom object types and creating instances of these objects. We'll walk through examples demonstrating how to define properties and methods, showcasing how objects can encapsulate data and functionality together.

Furthermore, we'll delve into inheritance in JavaScript, explaining how objects can inherit properties and methods from other objects. This is a powerful feature of OOP that allows for the creation of a more structured and hierarchical object model, promoting code reuse and reducing redundancy.

Another important aspect of OOP that we'll cover is encapsulation. Encapsulation is a mechanism of bundling the data (attributes) and the methods that operate on the data into a single unit, and controlling access to the internals of that unit. This concept is pivotal in hiding the internal state of an object from the outside world and restricting access to it, which leads to a more secure and robust system.

Additionally, we'll touch upon polymorphism in JavaScript, which allows objects of different types to be treated as objects of a common super type. This is another key feature of OOP that enhances the flexibility and scalability of applications.

By the end of this tutorial, viewers will have a comprehensive understanding of the principles of Object-Oriented Programming in JavaScript, including how to define and use objects, implement inheritance, encapsulate data, and employ polymorphism. These concepts are instrumental in developing complex, efficient, and maintainable web applications.

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[elkhanhamet]

Nobody on YouTube comes close to your amazing style David, honestly. It's like I'm being tutored by you face to face. It all becomes like a walk in a park!!!

[elkhanhamet]

incredible!!! What an amazing explanation, very passionate. Thank you David!!!

[adamrajnoha]

thanks, this is very well said and easy to understand. nicely done!

[rockface]

Wow a javascript video I could stay awake during