Packt
JavaScript Prototypes 2025 – The Complete Course
Packt

JavaScript Prototypes 2025 – The Complete Course

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Gain insight into a topic and learn the fundamentals.
Intermediate level

Recommended experience

12 hours to complete
3 weeks at 4 hours a week
Flexible schedule
Learn at your own pace
Earn a Certificate
With paid plans
Gain insight into a topic and learn the fundamentals.
Intermediate level

Recommended experience

12 hours to complete
3 weeks at 4 hours a week
Flexible schedule
Learn at your own pace
Earn a Certificate
With paid plans

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

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Recently updated!

May 2025

Assessments

9 assignments

Taught in English

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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

Packt - Course Instructors
Packt
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