The Boot.dev Beat. March 2025

Our new JavaScript course is live! ThePrimeagen’s course on building your own HTTP server from scratch is just around the corner, and the TypeScript track couldn’t be closer.

Anticipatorily, Lane

Patch notes

1. New JavaScript Course

We’ve redone our JavaScript course from scratch. The old one needed so much love, that it wasn’t even worth keeping. We threw it in the trash, and started anew. There are now 15 chapters, and we go pretty in-depth into some of the advanced stuff like the event loop and concurrency, so be prepared!

1. Variables
2. Comparisons
3. Functions
4. Objects
5. Classes
6. Prototypes
7. Loops
8. Arrays
9. Errors
10. Sets
11. Maps
12. Promises
13. The Event Loop
14. Runtimes
15. Modules

This is a course for developers, so I only recommend starting it after you’ve done some of our earlier Python courses.

2. Mobile experience that doesn’t suck

Opening a Boot.dev lesson on your phone is no longer a soul-crushing experience. I mean, there’s only so much we can do about the very real pain of trying to write code on a phone, but at least now you’re not also doing sweet battle with our UI.

3. Boots is smarter

Boots is now primarily powered by Anthropic’s Claude 3.7 Sonnet model, which made even bigger leaps in terms of reasoning and coding capabilities. Betters AI mentorship is better, so we hope you enjoy!

4. We acquired iCodeThis and are making it free

Boot.dev acquired Florin’s iCodeThis website this month! We’re still figuring out exactly what projects we want to tackle with it, but what we know for sure is that we’re opening it up for free. So, if you want to practice your CSS and frontend skills, be sure to check it out!

We haven’t quite finished stripping out all the paywall logic, but it should be done any day now.

5. Miscellaneous improvements

• The sidenav is gone! We’ve added all its functionality to the main topnav as well as the in-course menu
• The SQL course got a big UX update surrounding read-only tests and up-migration files. The order in which the files run is also now more obvious.
• More info modals have been added to explain game mechanics
• You can now leave ratings and reviews on courses when you finish them, and the ratings are shown on the course landing pages

What is yet to come

• ThePrimeagen’s new course on the HTTP protocol, where you build and HTTP server from scratch in Go
• A brand new TS course (and FULL TS track)
• A new dashboard view that gives a better “jump back in” experience, as well as a better view into your progress

New YouTube Videos

We publish all of our explainer videos and course walkthroughs on our YouTube channel for free! We also just started season 2 of the Backend Banter podcast:

• Build skills, not degrees. ft. Madison Kanna | S02 E08
• KRAZAM Unfiltered feat. Ben Burke | S02 E05
• Roll your own auth or you’re ngmi. ft. Dreams of Code | S02 E07