Welcome to RealJS: Why Learning JavaScript Still Matters When AI Writes the Code

Yes, You’ll Write Less Code by Hand

Let’s get this out of the way: you’ll type less code than developers did five years ago, and the tools keep getting better. Use them. We do.

But that was never really the question. The question is whether you understand JavaScript well enough to tell an agent what to build, and to judge whether what it hands back is any good. The answer to that one is yes, and the rest of this post is why.

You Can Only Review Code You Could Have Written

Every time an agent finishes a task, you’re doing a code review. And reviewing code is harder than writing it.

If you don’t have a mental model of how JavaScript works, you can’t tell a correct solution from one that only looks correct. The agent’s ceiling becomes your ceiling. If you do know the language, you get more out of the same tools today: clearer instructions, faster checks, and fewer rounds of “that’s not quite it.”

The Bugs That Matter Look Right

Agents write fluent, confident code. The bugs that make it past a quick glance are the ones only an understanding of the language will catch:

• A missing await that lets a function return before its data arrives
• A loose == comparison that treats "0" and false as equal
• A callback that quietly loses its this
• An event listener that’s never removed and slowly leaks memory
• An innerHTML assignment that opens the door to cross-site scripting
• A fetch() call inside a loop that turns one request into a hundred

None of these look wrong at first sight. Knowing the fundamentals is what makes them visible.

Pilots Still Train

A modern airliner flies on autopilot for most of the flight. Nobody concluded that pilots need less training because of it. Their job shifted toward monitoring and judgment, and toward the few minutes when the automation hands the plane back in the middle of a problem. Those minutes are why pilot training got more demanding, not less.

Working with coding agents puts you in the same seat. You supervise most of the time, take the controls some of the time, and need real skill for both.

Skill Comes From Doing the Work Yourself

Taste, gut feel, and debugging instinct don’t come from watching someone else code, and that includes watching an agent. You build them by writing and breaking real code yourself. Once you have that foundation, you can hand off the typing.

The job market reflects this. The companies that rely on coding agents the most still interview on fundamentals, data structures, and the language itself, because depth is what makes the agents worth having. Demand for people who can only produce basic code is falling. Demand for people who can direct that work with good judgment isn’t.

If you’re just starting out, this matters most of all. Agents let an experienced developer skip the typing, but they don’t let a beginner skip the understanding, because a beginner can’t tell when the agent is wrong. Now is the time to build those fundamentals, not skip them.

What You Can Expect From RealJS

We’re bringing over what has worked at Real Python:

• In-depth tutorials that explain why things work, not just what to type
• A careful editorial process, where every tutorial gets technical review and editing before it’s published
• Content kept up to date, so what you learn still works when you use it
• Something for every level, from language fundamentals to the tools and frameworks you use at work

Join the Waitlist

We’re working on the first batch of tutorials right now. Join the waitlist, and we’ll email you as soon as they go live:

Thanks for stopping by, and welcome to RealJS!