Understanding React

You're about to master React in a way that few others do. By truly understanding it, under-the-hood.

React is a required skill in the modern web development job market. But even devs experienced in React struggle with understanding it fully, and thus struggle with writing efficient code and debugging it quickly.

Everyone tries to learn! Maybe you've spent lots of time mimicing instructors, typing what they type like a robot parrot. The problem is that doesn't lead to true understanding.

In this course, you'll gain the most powerful tool a developer can have: an accurate mental model - which leads to unparalleled confidence and calm while coding.

I've read all of React's source code for you, and you're about to dive into it with me. Whether new or experienced, you're about to understand React.

React Can't Be Ignored

I've used, taught, and enjoyed other frameworks like Vue, Angular, Solid, and Qwik. But in today's job market, developers cannot and should not ignore React.

Check out this chart from the latest State of JavaScript survey:

See the top line? That's React. React's popularity isn't waning. It's rising.

As a web developer, you need to understand React.

React can be fun and interesting to use...if you understand it.

Don't Imitate, Understand

A lot of courses will use terms like "deep dive" and "under-the-hood", but not actually provide deep understanding.

I call the technique I use "don't imitate, understand". If you just parrot what the instructor is typing on the screen you might end up with a finished product. But as soon as you're dealing with challenges and problems in a real-world job, you'll realize the parroting didn't teach you all that much.

Instead of spending hours imitating me typing, we're going to dive deep together into React's source code to truly, deeply understand it.

We'll write plenty of code along the way, including project work. But we won't write a line of code we don't fully break down and understand.

JavaScript, Browsers, and Computer Science

As we dig into React's internals, we'll discuss the underlying algorithms and data structures you need to know to understand React.

We'll stop and spend time analyzing the vocabulary of React, making sure we don't use any terms that aren't clearly explained.

We'll approach React like a computer scientist. React is just other people's JavaScript code. So why did they write the code they wrote? Why does React work the way it does? What are the benefits? What are the pitfalls?

We'll also look at JavaScript and browser concepts that underpin React's choices and best practices. Things like immutability, object references, and the browser rendering engine. All of this to service using and debugging React well.

These topics will take rules that normally would be memorized (like the rules of Hooks, "pure" component functions, and things you can't do in JSX) and instead be able to derive those rules ourselves naturally by understanding how components and Hooks are structured and work inside React.

We'll write plenty of code along the way, including project work. But we won't write a line of code that we don't already fully understand.

The Fiber Tree

Understanding core React concepts like JSX, Hooks, reconciliation, and events properly all rely on understanding the Fiber Tree, as well as core data structures like Linked Lists and Queues. In this course we cover them all together.

100s of Animations

We won't just look at code. I've put together hundreds of animations so that you can visualize what the React is doing internally and fully understand it.

Then, we put that newfound mental model to use as we build your React knowledge piece-by-piece, and work through code examples together.

The Curriculum

The course contains 16.5 hours of video and is split into 27 modules. I've designed the course to be useful and accessible to developers new to React and will provide a deeper mental model and understanding to devs experienced in React.

You'll also get access to 80 zip files containing the code in the lectures so you can compare with your own.

And you can always ask questions in the lecture forums, where I answer personally.

The course covers a wide range of topics in a logical, progressive order. From JSX to Hooks to State and Context to React Server Components and so much more.

There's another thing I show you here that other courses don't. Rather than adding <div> elements everywhere, I show you how to think through marking up your React components with semantic, accessible HTML that improves your code's readability, maintainability, and SEO.

Here's the full curriculum (select a module for more details):

Watch The First 6 Hours For Free

I'm confident you will find this technique to be game-changing. I've seen it happen for students for a decade. It's how I've learned things during my 25 years of web dev.

I'm so confident it will help you, that I put the first 6 hours of the course for free on my YouTube channel. Feel free to watch here.

There's enough free training here, that even if you don't enroll in the full course you'll learn something about React that you didn't know before.

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