Become a Senior Frontend Developer — by actually mastering JavaScript
Step-by-step lessons that take you from fundamentals to building real components (and make frameworks like React and Vue feel easy).

Most JavaScript courses teach you concepts and leave you to figure out the rest. You watch the videos, nod along, then freeze when you try to build something real.

We don’t.

Through Learn JavaScript, I learned that I’m actually capable of programming, and I’m not just a design, HTML, and CSS guy.

I’m only halfway through the course, but I was able to learn Vue in 1.5 days, pass an interview test, and get a senior-level frontend development job.

Michael Levett

Get 3 chapters for free

Trusted by Industry Professionals and Publications

I wish Learn JavaScript was around when I first tried to learn JavaScript. It changed the way I approach JavaScript — now, I actually know what I’m doing when I write it.

It’s one thing to learn what an Array is. But it’s another to build a real component and go: “Oh, so that’s why I need to know what the hell an Array is!”

Kevin Powell

Zell wants you to know what he knows, not just be impressed by it. That’s rare — and it makes him a natural teacher.

Heydon Pickering

If you’re looking to learn JavaScript, Zell made a course that shows how to build 20 real components from scratch, step by step.

Zell is a really fun person too, so that helps when you’re trying to learn :)

Sarah Drasner

Your articles are honestly the best resources out there! They have really helped 100Devs folx understand topics that are always stumbling blocks for new devs.

Leon Noel

Zell can explain even the most technical jargon in approachable, fun ways. I’ve taken his courses and always look forward to his writing because I know I’ll walk away a better front-ender.

Geoff Graham

351 lessons, 20 components, a promise of bringing you from zero to expert, building up your confidence, letting you make anything in JS?

And virtually land any junior front-end position where you’d earn your investment back in a month?

Seriously. I would have sold my parent’s TV for this when I started learning JavaScript.

Sarah Dayan

Why JavaScript finally clicks for our students…

…even if they struggled with other courses

I assume you know nothing (and that's the point)

You don’t need to know what a variable is, or even how to include a JavaScript file.

This course builds your knowledge from the ground up, so you’ll never feel lost.

Every concept explained in words you actually understand

Most resources throw around terms like higher order functions and closures like you should already know what they mean.

I don’t do that here. Every concept gets a simple, plain-English explanation you’ll actually understand. This helps you remember things naturally.

You won’t memorize JavaScript. You’ll just… remember it.

There’s a secret technique to remembering anything easily (besides understanding them).

It’s to connect the concept to something you already know. Like when I teach functions, I compare them it to drawing water from a well.

When something clicks this way, you never forget it.

Step by step. This time for real.

Many other JavaScript courses skip steps in-between, forcing you to google things you don’t understand. Ever been thrown into Object Oriented Programming with no warning? That’s what I mean.

Here, you never have to google to understand anything — I walk you through every step, like a kind teacher holding a toddler’s hands as they learn to walk.

You won't stay a beginner for long

Each lesson builds on the last — you learn something, use it to build a real component, then improve that component with better techniques.

At some point, it hits you that you’re not a beginner anymore. And this point comes sooner than you’d expect.

I finally started to understand how to move on from a beginner level to an intermediate level.

The course doesn’t stop after the first steps. It shows you how to improve the component and include best practices.

Pelle Lundgren

Try the first 3 chapters free

Build 20 real components — Learn to think like a developer

You won’t build throwaway toys here. You’ll create 20 real-world components from scratch — then improve them with advanced techniques and best practices.

For each one, I explain what you need to know, why, and how to write each line of code to build the component. Then I show you how to refactor them.

You’ll absorb the process as you go — and that’s how you start thinking like a developer before you even know it.

This is the first course where I learned which parts of JavaScript actually matter.

I used what I learned to create real components. It’s satisfying to see my code doing something of real, practical use.

Jake Chiam

Off Canvas Navigation

The simplest and most practical component you can ever build.

Modal

The second easiest thing to build with JavaScript at the beginning. (It gets complex later).

Accordion

Perfect for learning to use loops

Tabs

Practice loops at the start too — then enhance for accessibility later.

Carousel

Amazing for understanding basic DOM manipulation and event delegation.

Calculator

Our first real complex component — great for understanding edge cases and refactoring.

Popover

Placing things with exact precision is one of the important aspects you have to understand to build good UI. We explore this in the Popover.

(We don't use the Popover API for this one).

Typeahead / Autocomplete

We explore how to create HTML elements, how to place them into the DOM, and also how to filter data — all these are important concepts for later components.

Google Maps Clone

Learn to create a Google Maps component with Google Maps API — you’ll feel accomplished for doing something really complex.

Todolist

The Todolist gives you the opportunity to build a real app with Async JS and REST API — optimistic UI included!

Dota Heroes Page

Here we play with a real public API. You’ll learn to find the data you need, fetch them, and work the data to create a proper app.

Datepicker

Lots of nifty CSS and JavaScript tricks in this one — including keyboard interactions for power users.

Countdown Timer

Besides just counting down numbers, you learn to work with dates, timeouts, intervals, unix epoch, and Daylight Savings.

Auto Hiding Sticky Nav

This is where we begin to play with basic scroll events — which is useful for delightful interactions.

Slide Reveal

Here you’ll learn to use the Intersection Observer to build scroll-based interactions.

Infinite Scroll

The Infinite Scroll is a useful pattern for loading information after a user scrolls to a certain point.

Spinning Pacman

In this component you learn to use mouse, touch, and pointer events effectively to detect and trace movement. Kinda mesmerizing…

Drag and Drop

Here you’ll learn to use mouse and pointer events to build a drag-and-drop functionally entirely in JavaScript in just 100+ lines of code.

You’ll be amazed by what you can make!

Tiny Framework

Learn to about frameworks by building a framework — so you understand the inner workings and never be confused.

Single Page App

Everything you need to know to build Single Page Applications with JavaScript. This helps you understand routing and url manipulation.

I used to be terrified of JavaScript too

I’m Zell. I taught myself to code, and JavaScript scared the hell out of me for years.

I’d use CSS for everything — checkbox hacks, you name it — anything to avoid writing a single line of JavaScript.

But deep in my heart, I knew I had to master JavaScript. So I took the plunge. The process was tough — confusing tutorials, missing context, concepts that assumed I already knew things I didn’t.

And when JavaScript finally clicked, something shifted — I stopped second-guessing myself. I started taking on projects I would’ve run from before, because I knew I had what it takes to deliver.

Why I created Learn JavaScript

The truth is, people kept asking me to write a JavaScript course. But I kept resisting it, because it felt like a lot of responsibility.

I finally relented, because I couldn’t bear hearing the same pain over and over.

People were…

getting stuck because they didn’t know enough JavaScript
taking courses but not getting anywhere (and wasting money in the process)
feeling stupid and demeaning themselves for not understanding JavaScript

I could hear the screams behind their messages…

Then one day, something snapped and I went f*ck it — I’m going to stop those screams once and for all. So I set out to make the best JavaScript course I could.

I thought it was going to take a few months at first. But nope. It took 4 years to build the course. In those 4 years:

I ironed out every single explanation that didn’t make sense
I rearranged chapters after realizing the “standard” teaching order was the problem — one change and entire categories of confusion just disappeared
I explained why I made every decision so nobody would be lost
I built every line of code — painstakingly, step by step, so students would absorb the process as they go

And it was worth it. Because students who went through this course stopped struggling with JavaScript and mastered it.

Zell explains things in a way that no other instructor has been able to do in my 15+ years of trying to “self-educate” in the world of Javascript.

Thanks to the things I learned from the course, I have since refactored our style guide at work and I found the confidence to start a Vue project.

Joshua Briley

Let me show you what’s in the course.

The Lesson Plan
22 chapters and 351 lessons that guides you from beginner to expert

Each lesson is bite-sized and takes just a few minutes to read. Have a look around and see what’s inside. (The first 3 chapters are free).

Chapter 1 — 12 min reading time

JavaScript and its ecosystem

Put the concepts and ideas in the right places by first understanding the ecosystem.

Chapter 2 — 74 min reading time

JS Basics

Get to know the foundational basics where you’ll build the rest of your skills on.

Chapter 3 — 21 min reading time

Building simple components

Begin to think like a developer by building simple components.

Chapter 4 — 35 min reading time

Arrays and loops

Gain clarity over the most confusing chapter for newbies.

Chapter 5 — 41 min reading time

Dom basics

Have full control over the DOM — and make magic happen.

Chapter 6 — 22 min reading time

Events deep dive

Gain mastery over Events, which is a core system in Vanilla JavaScript.

Chapter 7 — 45 min reading time

Transitions and Animations

Learn to create smooth and buttery animations that enhances everything you build.

Chapter 8 — 40 min reading time

Useful JS features

Use the best JavaScript features to make coding much easier

Chapter 9 — 47 min reading time

JS Best practices

Use industry-proven best practices to write code that’s easy to read, maintain, and debug

Chapter 10 — 94 min reading time

Manipulating text and content

More DOM goodness — which means more power and magic over what you can do.

Chapter 11 — 49 min reading time

Handling Forms

Everything you need to know about forms to build websites and apps

Chapter 12 — 91 min reading time

Handling Dates

Everything you need to know about Date and Time in JavaScript—without using any libraries.

Chapter 13 — 189 min reading time

Async JS

Master almost everything you need about Async JS—except building servers for Rest APIs (which is covered in another course).

Chapter 14 — 49 min reading time

Advanced Async JS

Real and practical stuff you’ll need to do, beyond the basics.

Chapter 15 — 126 min reading time

Handling Keyboard Events

Make your website and app keyboard accessible, and give power users keyboard shortcuts to play with.

Chapter 16 — 74 min reading time

Screen reader accessibility

Everything you need to know about JavaScript accessibilty written for self-taught developers.

Chapter 17 — 37 min reading time

Handling Scroll

Learn to add fancy animations that gives your website the zing when a user scrolls.

Chapter 18 — 46 min reading time

Mouse, Touch, and Pointer events

Everything you need to know about handling mouse, touch, and pointers.

Chapter 19 — 98 min reading time

Object Oriented Programming

Learn about this major JavaScript pillar. We only cover this here because you need sufficient skill before diving into this chapter.

Chapter 20 — 125 min reading time

Writing reusable code

Learn to make your code reusable so you can build stuff faster.

Chapter 21 — 47 min reading time

Going from Vanilla JS to JS Frameworks

Understand how to use a framework by building one — absolutely overkill, but you emerge with incredibly deep skill and expertise

Chapter 22 — 50 min reading time

Building Single Page Apps

Learn everything you need about building Single Page Apps without the use of a framework — another overkill, but you understand what all framework routers do.

This is the course I’ve been needing my whole career. I can now read and understand JavaScript without relying on Google for answers.

And I love having Zell as a mentor. He is patient and willing to teach me and other members of the community

Rich Edmund

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Everything you need to finally master JavaScript

Feel free to start with 3 free chapters to see how the lessons feel. Upgrade whenever you’re ready.

Free

Get 3 chapters and experience the lessons for yourself.

Lifetime access to 3 chapters (32 lessons)
Build 2 real components
Community access

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Mastery

Master JavaScript and write code like a senior frontend developer.

Lifetime access to all 22 chapters (351 lessons)
Build 20 real components.
Community access

Get Lifetime Access — $495 Start for $99 Today Get Instant Access · Lifetime access after 6 payments of $99

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Here's what students have said about Learn JavaScript

I just turned 63 and as a former teacher, I can really appreciate the time and thought you have devoted to Learn JavaScript.

I’m still working my way through it and I actually UNDERSTAND and I’m LEARNING and I’m beginning to feel the creative possibilities of coding!

It is thrilling to still be able to comprehend a totally new language system as an old person! Maybe I will ward off dementia!

Judy Fieth

Learn JavaScript is my number one choice for learning JavaScript. I finally feel that JavaScript is within my reach.

Elmir Halebic

I’m no longer afraid to show my work at job interviews. I became much more confident in my JavaScript skills thanks to Learn JavaScript.

Ion Leahu

Zell explains things in a way that no other instructor has been able to do in my 15+ years of trying to “self-educate” in the world of Javascript.

Thanks to the things I learned from the course, I have since refactored our style guide at work and I found the confidence to start a Vue project.

Joshua Briley

Every time I jump into the course, I deepen my JavaScript knowledge and I become more marketable for work.

Lauralee Flores

Learn JavaScript will turn you into a JavaScript wizard. It is one of my favorite resources due to Zell’s ability to present content in a crystal clear manner.

Christian Boyle

I used to think that JavaScript is overwhelming and hard. Now, I gained the confidence that I can not only understand JavaScript, but I can master it.

Jesse Mcintire

I no longer panic when I use JavaScript. Zell makes JavaScript fun and easy to learn.

Marion Couneson

Learn JavaScript helped me understand and internalise JavaScript instead of feeling “I just watched some videos”.

Dave henson

I used countless other books and courses before, but none of them gave me the applicable knowledge I needed to be a solid frontend developer.

Learn JavaScript is the only course that gave me that knowledge. I can build pretty much whatever I want now — even from scratch without relying on 3rd party libraries.

Ernest Weems

I’m able to learn faster compared to other methods I tried. And now, I am able to complete Codewars challenges.

Erik Schjolberg

I learned to build exciting UI components that I’ve always wanted to build.

Israel Obiagba

This is the first course where I learned which parts of JavaScript actually matter.

I used what I learned to create real components. It’s satisfying to see my code doing something of real, practical use.

Jake Chiam

I wish Learn JavaScript was around when I first tried to learn JavaScript. It changed the way I approach JavaScript — now, I actually know what I’m doing when I write it.

It’s one thing to learn what an Array is. But it’s another to build a real component and go: “Oh, so that’s why I need to know what the hell an Array is!”

Kevin Powell

Even though I am a professional web developer, I gained new perspectives on things I already know — and learned things I didn’t know before.

Maxim Konoval

Through Learn JavaScript, I learned that I’m actually capable of programming, and I’m not just a design, HTML, and CSS guy.

I’m only halfway through the course, but I was able to learn Vue in 1.5 days, pass an interview test, and get a senior-level frontend development job.

Michael Levett

I would’ve given up on learning JavaScript long ago if it weren’t for the community in Learn JavaScript.

After going through the course, I was able to help newer programmers with their questions!

Michiko Y.

I’ve tried lots of other JavaScript courses, both free and paid. Learn JavaScript is the only course that helped me understand JavaScript.

I can now think like a developer, build applications myself, understand other developers’ code, and even answer questions on StackOverflow.

Adam Ragheb

Learn JavaScript helped me discover holes in my knowledge even though I have a few years of JavaScript experience!

I became more confident when working with frameworks and libraries, and I spend less time on Google and Stack Overflow.

Oriol Gasquez

I finally started to understand how to move on from a beginner level to an intermediate level.

The course doesn’t stop after the first steps. It shows you how to improve the component and include best practices.

Pelle Lundgren

What I loved about Zell’s work is that it’s really detailed but not overwhelming. He guides you slowly, from basics to advanced concepts, step by step.

Thanks to Zell, I got a front-end web development job abroad, in the wonderful city of Lausanne in Switzerland!

Pierre Wizla

This is the course I’ve been needing my whole career. I can now read and understand JavaScript without relying on Google for answers.

And I love having Zell as a mentor. He is patient and willing to teach me and other members of the community

Rich Edmund

The course pushed me forward in my coding career. JavaScript became fun to write. And I no longer avoid JavaScript.

Robert Mittl

This course is a fail-safe system for learning JavaScript. If you want to really understand JavaScript, this is the only course you’ll need.

Now, I feel comfortable writing and reading JavaScript. I also feel comfortable making mistakes and debugging my code.

Shahar Levy

I found a better web development job thanks to the skills I learned from Learn JavaScript.

Sirapop Lam-o-pas

Learn JavaScript does not assume I knew anything and zip through things unlike other courses. It’s very easy to learn with the examples and source code provided.

Tim St. John

Learn JavaScript helps you build your web fundamentals, which helps you with your work — regardless of what framework you decide to work in.

Tom Mulkins

Like these people before you, as soon as you take the plunge, you to see that JavaScript isn’t that hard after all.

You can learn JavaScript too.

Get 3 chapters for free

Frequently Asked Questions

Here are some questions people have asked before joining Learn JavaScript

I'll take the risk. You take the course

You’ve probably bought courses before that didn’t work. Watched a few videos, got lost halfway, and never finished. I get it.

Try this one for 30 days. Go through the lessons, build the components. If you’re not making progress you can feel, email me and I’ll refund you in full.

I’d rather give your money back than have you stuck.