Subtyping and Inheritance in JavaScript and Object-Oriented Programming

Writing clean, reusable code is one of the biggest challenges when building modern front-end web applications. To write scalable JavaScript, you must deeply understand how objects share behavior and structure beneath the surface. This course guides you from the fundamental principles of object-oriented programming to advanced subtyping and inheritance patterns. You will transition from writing repetitive script files to designing robust, hierarchical systems using native JavaScript mechanisms. By learning how memory, prototypes, and classes interact, you will write cleaner code and debug complex applications with ease. What you'll learn: - Understand the core differences between classical inheritance and JavaScript prototype-based inheritance - Configure custom prototype chains and understand the role of constructor functions - Implement modern ES6 class syntax, including getters, setters, and private class fields - Apply subtyping principles to create flexible and reusable object hierarchies - Avoid common design pitfalls by choosing composition over inheritance where appropriate - Practice modern object-oriented patterns using clean, type-safe development habits The course begins with foundational definitions of objects, properties, and prototype chains, ensuring you grasp the 'why' behind JavaScript's unique model. You will then progress through structured text-based lessons that cover modern class syntax, subtyping rules, and real-world architectural design patterns. This course is designed for beginner to intermediate JavaScript developers who want to move beyond basic scripting and master structured software design. No prior experience with object-oriented programming is required. Start reading today to build a stronger foundation in JavaScript architecture.