ES6 in Practice
ES6 in Practice (Full Package: 15 Lectures, 59 Exercises and Solutions + Bonuses)
ES6 in Practice

This book is 90% complete

Last updated on 2017-01-15

About the Book

ES6 is Everywhere

Including Job Interviews and Open Source Code

ES6 comes with a lot of new features, focusing on making JavaScript more usable. Popular frameworks already come with ES6 support. More importantly, ES6 makes JavaScript more popular, which means to you that there will be more JavaScript-centric frontend and full stack positions available to you.

Above all, ES6 is fun. Allow me to show you how easy it is to use ES6. Verify that the lessons stay with you with some fun exercises.

Tell me more about my learning experience

The goal of this course is to strengthen your problem solving skills by using the new features of ES6.

You will be able to focus on the parts of JavaScript you are interested in the most. After understanding the fundamentals, you will get some exercises that let you put theory into practice. You will also have access to reference solutions that enrich your knowledge.

You will work on practical problems, not just dummy examples. Most examples were inspired by web applications I had worked on personally. This means to you that you will see real stories, real objects, and real variable names, not just another meaningless foo variable that most facilitators use when they run out of creativity.

  • Fix REAL-WORLD problems in JavaScript. Most JavaScript tutorials teach you the fundamentals, and then they leave you in front of a blank screen. Practical ES6 develops your problem solving skills, so that you will be able to get started with coding.
  • Focus on UTILITY, not edge cases. What is worse than spending money on a spiced up version of the official documentation? Wasting your time to process it, just to find out that 80% of the content does not apply to you. ES6 in Practice gives you information on getting started with a topic, and you can immediately put it into practice using the Workbook.
  • Write MAINTAINABLE code that will make you successful on the job. Stop learning how to apply hacks with JavaScript. Focus on writing understandable and maintainable code instead.

What will I learn?

  • Write compact code with Arrow Functions, Default Arguments
  • Find out why let is the new var
  • Understand and use the Class Syntax of JavaScript
  • Demistify Destructuring
  • Command arrays and functions with a variable number of arguments with the Spread Operator and Rest Parameters
  • Learn useful Object and Function Enhancements in ES6
  • Understand what Tail Call Optimization is so that you will be prepared to write efficient code
  • Meet the Symbol type and its use cases
  • Write clean loops with for..of
  • Create cool templates with Template Literals
  • Use 4 byte Unicode characters with the ES6 Extended String Support
  • Create Iterators, Iterables and Generators to master lazy evaluation and handle infinite sequences
  • Escape the Pyramid of Doom by writing proper ES6 Promises
  • Start writing and transpiling ES6 applications with Webpack and Babel
  • Master ES6 Proxies and the Reflect API
  • 18 Lessons
  • 2 Bonus Lessons on ES2016 and ES2017
  • A Bonus Lesson on creating your learning plan
  • 59 Exercises with Reference Solutions

Is ES6 in Practice good for me?

ES6 in Practice is for you if you are looking for a course that

  • helps you develop your JavaScript problem solving skills
  • helps you understand JavaScript more deeply than just scratching the surface
  • helps you get rid of Underscore/Lodash, jQuery
  • helps you prepare for the JavaScript job interview
  • takes you from knowing ES5 to ES6

If you don't have any programming experience, I discourage you from buying the course, as you will need minimal experience in JavaScript to benefit from it. You should know what variables are, what the basic types in JavaScript are, and how to write basic statements and loops.

Don't worry if you are a beginner. The first quarter of the course will give you some quick wins that you will be able to put into practice, regardless of your experience.

My goal is to make this course as approachable as possible, so if you get stuck, send an email to I will update the book regularly based on your feedback. In fact, I encourage you to shape the contents of the book with your feedback.

If you are not sure if this course is for you, I encourage you to try it out, and if you don't like it, ask for a 100% refund.


Full Package: 15 Lectures, 59 Exercises and Solutions + Bonuses

Learn about ES6 features from a practical point of view. Understand these features in depth by solving 49 exercises in the book. Check, and learn from the reference solutions at the end of the book.

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Team Licence

Includes the full package for your entire team of up to 15 developers. For a larger team size, add $5 per person. Add $100 to the price for an online consultation of up to an hour, and four weeks of dedicated e-mail support (limited offer). In order to claim your bonuses, send your LeanPub invoice to

  • English

  • PDF

  • EPUB

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Bundles that include this book

The Developer's Edge
ES6 in Practice
2 Books
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About the Author

Zsolt Nagy
Zsolt Nagy

There were times when I was not conscious about my career choices at all. During my university years, I was far too busy with my studies and with an EU funded research project. While writing my thesis, I earned more than the average starting salary of MsC graduates in my country. When things are going so well early in your career, believe me, you won't start thinking about the next step. 

This proved to be a mistake. I started my job interviews just a couple of months before graduation. I only had a resume, and some references on a research project. I also happened to be a below average communicator. 

Even though I could choose from many options, none of those options seemed to be too lucrative. Having realized my awkward position, I chose the path of maximum responsibility, and joined a tech startup. The trade-off for excellent working conditions was bad pay. I kept on telling myself that I deserved more. Truth is, I deserved exactly the amount that I was able to negotiate. Back then, I didn't accept these facts, and was waiting for others to give me a raise whenever they praised me. A simple strategy destined to fail. 

Software developers are in high demand, as there is a shortage of good professionals all over the world. I asked myself, come excellent developers still waste their talent by working for companies that don't respect them financially or professionally? 

Throughout the last ten years, I have been continuously improving my tech skills as well as my soft skills. These improvements have enabled me to assume Team Lead and Technical Lead positions. Above all, these skills have enabled me to work with the companies I want. I encourage you to do the same. 

For more, visit my website,

My technical blog is about developing maintainable web applications using JavaScript. Read it on

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