#26.JavaScript Prototypes Explained with Practical Examples | Prototype Chain, proto & Inheritance

JavaScript prototypes are one of the most confusing yet powerful concepts for beginners and even intermediate developers. In this video, you’ll learn what prototypes are in JavaScript, why they exist, and how prototype-based inheritance works — all explained using simple real-world examples.

We start by understanding how JavaScript objects share methods using prototypes, then move into constructor functions, prototype chains, and how this works behind the scenes. You’ll also learn the difference between prototype, __proto__, and Object.getPrototypeOf(), which is a very common interview question.

This tutorial includes practical examples showing:

How to attach methods using Constructor.prototype

Why methods inside constructors waste memory

How objects inherit properties using prototype chaining

How arrays, strings, and functions use prototypes internally

How to safely set and get prototypes using modern JavaScript

If you are learning JavaScript, React, Node.js, MERN stack, or preparing for interviews, this video will give you a rock-solid foundation in JavaScript internals.

📌 Topics Covered:

What is Prototype in JavaScript

Why JavaScript uses Prototypes

Prototype vs _proto_

Prototype Chain explained

Reference vs Primitive types

Object inheritance without classes

Common mistakes beginners make

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