JavaScript: Understanding the Weird Parts (

An advanced JavaScript course for everyone! Scope, closures, prototypes, 'this', build your own framework, and more.

Created by: Anthony Alicea

Produced in 2022

What you will learn

  • Grasp how Javascript works and it's fundamental concepts
  • Write solid, good Javascript code
  • Understand advanced concepts such as closures, prototypal inheritance, IIFEs, and much more.
  • Drastically improve your ability to debug problems in Javascript.
  • Avoid common pitfalls and mistakes other Javascript coders make
  • Understand the source code of popular Javascript frameworks
  • Build your own Javascript framework or library

Quality Score

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Overall Score : 98 / 100

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Course Description

Javascript is the language that modern developers need to know, and know well. Truly knowing Javascript will get you a job, and enable you to build quality web and server applications. NOTE: This course includes information on ECMAScript 6 (ES6) the next version of Javascript! In this course you will gain a deep understanding of Javascript, learn how Javascript works under the hood, and how that knowledge helps you avoid common pitfalls and drastically improve your ability to debug problems. You will find clarity in the parts that others, even experienced coders, may find weird, odd, and at times incomprehensible. You'll learn the beauty and deceptive power of this language that is at the forefront of modern software development today. This course will cover such advanced concepts as objects and object literals, function expressions, prototypical inheritance, functional programming, scope chains, function constructors (plus new ES6 features), immediately invoked function expressions (IIFEs), call, apply, bind, and more. We'll take a deep dive into the source code of popular frameworks such as jQuery and Underscore to see how you can use your understanding of Javascript to learn (and borrow) from other's good code.
Finally, you'll learn the foundations of how to build your own Javascript framework or library.

What you'll learn in this course will make you a better Javascript developer, and improve your abilities in AngularJS, NodeJS, jQuery, React, Ember, MongoDB, and all other Javascript-based technologies!
Learn to love Javascript, and code in it well. Note: In this course you'll also get downloadable source code. You will often be provided with 'starter' code, giving you the base for you to start writing your code, and 'finished' code to compare your code to. Who this course is for:
  • Those with basic Javascript skills who wish to improve
  • Experienced coders coming from other programming languages
  • New and experienced Javascript coders who want to deepen their understanding of the language
  • Anyone who has found concepts just as object prototypes, closures, and other advanced concepts difficult to learn
  • Those who have suffered surprising errors while writing Javascript, and want to learn why and how to avoid them
  • Those interested in building their own frameworks, or being better able to learn from the source code of other well-known frameworks and libraries

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Instructor Details

Anthony Alicea

Newly married in Cleveland Ohio, Tony is primarily focused these days on trying to be a good husband. While inexperienced at that, he's quite experienced in all things web.
Tony has been programming since he was 12 years old, and got into web sites and web application development at 16. After graduating with a Computer Science degree from Case Western Reserve University, Tony continued with that interest as a Microsoft certified software application developer and architect, database designer, and user interface designer.
His experience has ranged across technologies such as HTML5, CSS3, ASP .NET MVC, JavaScript, jQuery, KnockoutJS, AngularJS, NodeJS, LESS, Bootstrap, SQL, Entity Framework and more.
He believes strongly that deeply understanding any topic allows you to properly learn it and, even more importantly in a real-world environment, quickly overcome problems.
He also has a deep interest in human nature and behavior, and how that impacts human-computer interaction. This interest translated into extending his career into user experience design and usability research.
Another link in the chain is his 25 years of experience in public speaking and teaching, both in front of large groups and as a one-on-one private instructor.
Putting all these pieces together, he has spent his career listening to a client need, designing a database and software to meet that need, building it, testing it, teaching others how to use it, then improving user exper



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Great Course and excellent way of explaining the concepts under the hood. A big like to the course trainer and looking forward to take the other courses of him.

One of the best instructors on Udemy. He explains every JS concept in everyday conversation and is considered a top expert in teaching the Javascript language.

Excelente para las personas que quieren profundizarse en Javascript y entender como funciona realmente.

This is an excellent course! I went through this course a few years ago when I was pretty new to programming and JavaScript and I just finished it again. I didn't understand most of the concepts my first time around, but this second time was much better. So I would recommend that you take this course when you have some of the basics of JavaScript under your belt.

Explained a lot of details that I was having trouble understanding from a book.

Anthony leaves no stone left unturned regarding the fundamentals of JS. I can now peruse the source code of existing JS libraries and frameworks to continue my "open-source education!"

Now, I understand how JS engine works and how to be a better developer!Thanks!!!!

I've had SO MANY many "Ah HAH!" moments on this course. I've read a tonne of books but still never really managed to piece together my (lack of!) knowledge of JavaScript into little more than poorly educated guesswork. I really now know SO MUCH about what JavaScript is doing when it's doing its thing. Thank you, thank you, THANK YOU. Great course. Highly recommended to all that have nearly got JavaScript (my first language so I've no idea what's weird!) but can't tell why they haven't.P.S. I NEVER write reviews but I think this course really deserves it.

I knew some of the stuff, but I learned a lot and it addressed many of questions I had in mind. Taking this course was a very good strategic move for me because I did not know how to improve my JavaScript knowledge. I read some online content, but I knew there was a lot more to it than what I learned. I am looking forward to the next Java Script course and a few other courses in front end development. The instructor repeats some of the concepts, which is great for me to remember the definition and content. I am so thankful for this content. Good stuff.I am so glad I took this course. It reinforced some of the stuff I knew from learning C#, and I really needed a revisit. Also having an expert show the code and explain and discuss all the details is amazing. There is no other source to get this type of learning with the comfort of being at your home, or job, or where ever. I would write more, but I am short in time.

While decent at JS, this course has made me feel confident in not only my ability to create something in JS but read and fully understand it. Thank you. By far one of the best resources to learn JS.

This is a great course that will help bridge the gap on a lot of important concepts. Taking this course has brought me one step closer to advancing my career as a web developer and starting my own business.

Wonderful learning. Well structured, Precisely pointed out the real weird concepts and explained with nice examples. Loved it.. Thanks for the course