JavaScript Under the Hood: Prototype, New, and Classes

Many developers use modern JavaScript classes every day without truly understanding how they work under the hood. To write efficient, bug-free web applications, you need to look past the syntactic sugar and master the underlying prototype chain. This comprehensive text-based course guides you through the core mechanics of object-oriented JavaScript. You will start with foundational concepts like object creation and execution contexts before diving deep into prototype linking, constructor functions, and the automation provided by the new keyword. Beyond basic syntax, you will explore modern patterns including private class fields, static methods, and memory-efficient inheritance. What you'll learn: Understand how execution contexts and the prototype chain manage memory and behavior; Configure objects using prototype linking to share methods across instances; Apply the new keyword to automate object creation and link internal properties; Translate constructor functions into modern ES6 class syntax; Implement encapsulation using private class fields and static properties; Debug complex prototype-related issues in modern application code. This course begins with basic definitions and essential terminology before guiding you through practical code analysis and design patterns. It is designed specifically for beginner to intermediate developers who want to transition from writing basic code to understanding deep architectural concepts, with no advanced prerequisites required. Start reading today to demystify how JavaScript handles objects and inheritance.