JavaScript: The Hard Parts

August 24th & August 25th, 2017 • 9:30am – 4:30pm CST

Attend Online

Live and Full HD


Attend In-Person

From: Downtown Minneapolis, MN

Start Learning Today Learn JS: The Hard Parts Money-back Guarantee

Here’s why you should join us!

By coding along with us for this workshop you’ll understand:

  • How higher order functions like map, reduce and every are really working so you can use and rebuild them effectively
  • How the asynchronous world of JavaScript works – in terms of the call stack, callback queue, event loop and threads
  • Object-oriented programming and the different Object-oriented patterns available to us in JavaScript through the prototype chain
  • One of the most misunderstood but most powerful features of JavaScript – closure – by understanding execution context, JS runtime and the variable environment
Your ticket includes the full workshop (online or in-person), immediately available replay videos, plus a complimentary 6 month membership to watch all our video courses (a $234 value)

Your Instructor

Will Sentance

Will Sentance is cofounder and CEO at Codesmith – a software engineering and machine learning residency based in Los Angeles, New York and Oxford. He is the creator of Icecomm, the most popular developer platform for P2P video and data communication. Prior to Codesmith, Will was CEO at Ownly and a Software Engineer at Gem. Will graduated from Oxford University and Harvard University.

Interact With the Instructor

Online & In-Person

Get Your Questions Answered

Spend the Day Immersed With a Leading JavaScript Master

JavaScript powers the modern web, and increasingly mobile and hardware. Just ‘making it work' is vital to moving quickly but when you want to become super-powered in JavaScript you have to go deeper.

Join Will Sentance as he helps you understand concepts that 90% of JavaScript engineers don't really get. We'll do this by combining under-the-hood mental models with pair-programming through challenges together. You'll come away understanding callbacks and higher order functions, closure, asynchronous JavaScript and object-oriented JavaScript– helping you improve how you write code, debug more effectively and become the versatile problem-solving developer you aspire to be.

What's Included



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How We'll Spend the Day

We've already held over 60 workshops holding thousands attendees in-person and online. In this time we've discovered ways to schedule the day so it goes smoothly and efficiently.

Regardless if you're in-person or participating with us online you'll have the full ability to replay things you missed, get your questions answered LIVE and interact with the teacher throughout the day.

Day 1:

9:30am Welcome and Introductions
10:00am Part 1 – Principles of JavaScript – Thread, Execution context and Call stack
10:30am Pair-programming
10:45am Part 2 – Callbacks and Higher order functions
11:15am Pair-programming
11:45am Lunch and Hacking
1:00pm Part 3 – Closure
1:30pm Pair-programming
2:00pm Part 4 – Asynchronous JavaScript
3:00pm Pair-programming
3:30pm Part 4 – Asynchronous JavaScript (continued)
4:30pm Wrap-up and Questions

Day 2:

9:30am Part 5 – Object-oriented JavaScript – Approaches to OOP
11:30am Pair-programming
12:30pm Lunch
1:30pm Part 5 – Object-oriented JavaScript – Approaches to OOP (continued)
2:30pm Keyword ‘this’ in JavaSCript
3:30pm Pair-programming
5:00pm Final Wrap-upt

*Note that this is a rough schedule of how each day typically break down, but that this will be adjusted as we go to make sure everyone can follow along.

In JavaScript the Hard Parts you balance developing ‘under-the-hood' mental models of how the challenging concept works with diving into coding challenges – giving you the capacity to effortlessly navigate through any new problems.

We start with callbacks and higher order functions. These functions like map, reduce and filter are powerful tools and keep our code DRY but can be complex to navigate. We will learn to diagram through even the most complex higher order functions and callback scenarios so you can build your own higher order functions from scratch

Next we move to closure – probably the most misunderstood feature of JavaScript yet one of the most powerful. By introducing the execution context and variable environment, we'll be able to understand classic closure functions like once, memorize and even password-protected functions.

Next we explore asynchronous JavaScript under-the-hood. Understanding this area is the backbone to being an effective JavaScript engineer. To do so we'll get a clear sense of the call stack, event loop and task queue so you can navigate complex asynchronous problems easily

Finally we explore the most popular Object-oriented programming patterns in JavaScript and learn how the ‘this' and ‘new' keywords are working under-the-hood with the prototype chain. We close with an advanced look at subclassing in JavaScript.

The Price

The price for attending this 2-day workshop is simply the cost of becoming a monthly ($39) member. If you have already attended one, you know this is a tremendous value. If you haven’t, you may be wondering if it’s truly worth becoming a member.

Browse through just a few of the testimonials and you’ll see that people RAVE over these workshops. They’re unique and provide an experience and education you simple cannot find anywhere else.

You’re getting access to some of the brightest, most highly sought after experts in the world, covering topics very few people discuss in detail. Many attendees report learning more in this 2-day workshop than they did about a particular topics in the past 1-2 years combined.

Combine that with access to thousands of unique, high quality videos in our membership area with 500 hours of in-depth training from world renowned experts and you’ll see why this is a bargain.

  1. These workshops are different from any others you’ve attended. They cover everything, from the basics to advanced material. All of which are available for replay so you can go back and review as your skill grows.

  2. We get a lot of people saying they are scared to join… until it was over. Then they brag about how much of an amazing value they got for the price.

  3. You’re also getting videos of the workshop, plus ALL other workshops we’ve recorded, instantly!

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Who this class is for?

You want to be able to use all the power of JavaScript to build on the front-end, backend or anywhere in between. Perhaps you've used some of the concepts covered but you want to go a little deeper in the language to develop the mental models of how these concepts are really working – so you can use them effectively without just ‘making it work'. Maybe you're already a professional developer or perhaps you are aspiring and want to rapidly accelerate your JavaScript understanding


You should be familiar with JavaScript syntax and you likely have encountered some of the concepts covered in the session – even if your understanding of the concepts is still hazy. You have likely been working on some intermediate material – perhaps Eloquent JavaScript or some challenges on functional and object-oriented programming. Veteran JavaScript developers may find some of the material too basic but can still benefit from parts

You'll Either LOVE This Workshop Or You Don't Pay. Period.

Our attendees are ecstatic by the high-quality, relevant content they receive at these workshops.

We cover everything in explicit detail (and the things we miss are covered by answers to YOUR questions) from basic to advanced tactics you can start working with the very same day. We don't want you to miss out on this opportunity because you've been to less-than-stellar workshops in the past. We promise you, ours are very unique.

That's why if you attend the workshop and aren't absolutely thrilled with the content… if you don't think it's worth the admission price… We refuse to accept your money. We will more than gladly issue you a full refund, so you risk nothing.

We're very specific about what you're getting here and have ran lots of workshops… so we've almost never have requests for refunds (99.8% satisfaction rate).

MJG Workshop Center • 60 South Sixth Street, Suite 3625, Minneapolis, MN, 55402

What Past Attendees Are Saying

"Superb presentation from a genuine domain expert. I learned a ton today."

Steve Jakubowski

"Keep up the good work. I've attended a lot of online workshops, and they are very shallow and unpractical. Most of the time, online people are treated as second class, but still paying citizens. Here we get all the content and get to participate as well (if only there was a way to get those cookies...)."

Adrian Murillo

"The class was great. It was really cool to get a bunch of links to example code to look at during the presentation and after the class."

Nate Yourchuck

"Good location and facility. Great technology for capture, presentation layout and video streaming. Really excellent being able to view the videos afterwards. It takes away the sense of having to absorb everything immediately or else lose it into the ether. It was fun. What more can you ask for?"

Laurence Bates

"Really well run...loved the communication pre-event. Very impressed with everything...this was my first online conference purchase, but I would definitely consider doing it again."

Jeff Sims

"I really enjoyed the online workshop experience. It is much better than just watching videos. I was able to participate in the conversations and benefit from other folks' questions."

Dana Greenberg

"You guys did a really great job! I cannot say enough good things about the experience."

Richard Ranke

"Everything was first class: excellent instructor, material, video, moderator, audio. Thank you!"

Oscar Pagani

My name is Marc Grabanski I'm the founder of Frontend Masters. I guarantee this workshop will be awesome. Period.

If you don't think it's worth 10x the value, I'm happy to give you back every penny. That's my promise to you!

Marc Grabanski
Founder Frontend Masters