Master the foundations and nuances of JavaScript’s prototypal inheritance system in this comprehensive course. You'll gain a deep understanding of how JavaScript handles object creation, inheritance, and the prototype chain, equipping you with practical skills to write more efficient and scalable code.



JavaScript Prototypes 2025 – The Complete Course

Instructor: Packt - Course Instructors
Included with
Recommended experience
What you'll learn
Understand the prototype chain and how inheritance works in JavaScript
Build multi-level custom inheritance structures using functions and classes
Compare and choose between prototypes and composition in real-world scenarios
Skills you'll gain
Details to know

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May 2025
9 assignments
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There are 9 modules in this course
In this module, we will establish a foundational understanding of JavaScript prototypes and how they shape the object-oriented paradigm in the language. You’ll explore the internal [[Prototype]] mechanics, examine the special behavior of functions, and see objects as the central actors in JavaScript. To bring theory into practice, we’ll wrap up with a project that connects all the key ideas.
What's included
6 videos1 reading1 assignment
In this module, we will dive deep into the [[Prototype]] object and its hidden yet powerful role in JavaScript inheritance. You’ll uncover how prototype chains are formed, how properties and methods are inherited, and what happens behind the scenes with primitives and constructors. With real examples and important warnings, this section prepares you to handle prototypes with both confidence and caution.
What's included
24 videos1 assignment
In this module, we will explore the full spectrum of JavaScript instantiation patterns, from object literals to ES6 classes. You’ll learn how functional, prototypal, pseudoclassical, and class-based approaches differ, when to use each, and how to implement them effectively. This section equips you with practical knowledge and hands-on examples to help you choose the best pattern for your development needs.
What's included
15 videos1 assignment
In this module, we will take a focused look at __proto__, JavaScript's once-popular but now partly deprecated way of managing prototypes. You'll learn where it fits in the prototype chain, why it’s no longer recommended, and how to safely use modern alternatives. We'll also highlight common issues tied to __proto__ and how to avoid them in clean, future-proof code.
What's included
9 videos1 assignment
In this module, we will demystify the .prototype property and its critical function in JavaScript's inheritance system. You’ll learn how it links constructor functions to their instances, understand its relationship to [[Prototype]], and explore key concepts like the constructor property and prototype chaining. By the end, you’ll have a clear mental model of how .prototype shapes object behavior across your code.
What's included
17 videos1 assignment
In this module, we will bring theory into action by building real prototype chains using multiple approaches—from classic constructor functions to modern ES6 classes. You'll create 3-level inheritance structures, tackle issues like constructor misreferences and code duplication, and explore the evolution of JavaScript inheritance techniques. This hands-on section ensures you're ready to apply prototype knowledge in real development projects.
What's included
15 videos1 assignment
In this module, we will explore how inheritance is implemented differently across prototypal and class-based object-oriented languages. Through hands-on comparisons—including a "Hello World" example and Java code analysis—you'll gain clarity on how JavaScript’s prototypes diverge from traditional class structures. By the end, you'll confidently differentiate between these paradigms and understand their respective strengths.
What's included
7 videos1 assignment
In this module, we will explore composition as a powerful alternative to prototypes in JavaScript. You'll learn how to shift from inheritance-based design to composition-based architecture, gaining flexibility and modularity. By the end, you’ll be equipped to choose the right approach—composition or prototypes—based on your project’s specific needs.
What's included
3 videos1 assignment
In this module, we will wrap up the course with a concise review of everything you've learned about JavaScript prototypes. From fundamental concepts to hands-on implementation, you’ll reflect on your progress and solidify your understanding. This final section sets the stage for confidently applying prototype-based thinking in your own projects.
What's included
1 video1 assignment
Instructor

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Frequently asked questions
Yes, you can preview the first video and view the syllabus before you enroll. You must purchase the course to access content not included in the preview.
If you decide to enroll in the course before the session start date, you will have access to all of the lecture videos and readings for the course. You’ll be able to submit assignments once the session starts.
Once you enroll and your session begins, you will have access to all videos and other resources, including reading items and the course discussion forum. You’ll be able to view and submit practice assessments, and complete required graded assignments to earn a grade and a Course Certificate.
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Financial aid available,