JS Days is a free, online, two-day JavaScript conference (Sept 16-17, 2026). If you've seen it mentioned and weren't sure what it is or whether it's for you, this is the quick guide. Full disclosure: I'm on the team at Sencha that helps run it.
If you spend any time in JavaScript circles, you've probably seen "JS Days" pop up and wondered whether it's worth your time, especially if you've never been. Short version: it's free, it's online, and it's genuinely useful whether you're a few months into JavaScript or a decade deep. Here's what you're actually signing up for.
The basics
What: JS Days 2026, a two-day online JavaScript conference
When: September 16-17, 2026
Where: Online (join from anywhere)
Cost: Free
Host: Sencha, the team behind Ext JS, a JavaScript framework for enterprise apps
What you'll actually see
The program is a good cross-section of where JavaScript is right now:
- Modern JavaScript and front-end frameworks: how teams choose and use a web application framework in 2026, and where React fits alongside everything else.
- UI frameworks and component libraries: building interfaces on a solid UI framework and a reusable component library instead of hand-rolling buttons, forms, and grids every time.
- Enterprise software development: the less glamorous, high-value work, like large datasets, data grids (yes, including the dreaded 100k-row React data grid), and apps that have to stay fast and maintainable for years.
- AI-powered development: building custom AI agents in JavaScript and React, plus AI-assisted UI components.
- Low-code and rapid application development: shipping real apps faster, and where low-code software development platforms genuinely save time.
If you're still sorting out the difference between JavaScript libraries and full frameworks, or when enterprise application development calls for different tooling, the sessions do a nice job of drawing those lines.
How the two days work
Day 1 opens with a keynote from James Cahill (Sencha's GM) and runs 45-minute sessions. Day 2 splits into focused tracks (low-code, UI development, and React) so you can follow whichever matches your work.
A few talks to give you a flavor:
- Crafting Custom AI Agents with JavaScript, React & ReExt by Marc Gusmano
- Techniques for Large Data Handling in Ext JS by Rafael Méndez
- AI-Powered UI Components by Andres Villalba
- Ext JS Dashboards for Supply Chain & Fleet Management by Wemerson Januario
Is it worth it if you're new?
Honestly, maybe more so. If you're still building a mental map of the ecosystem (frameworks vs. libraries, when to reach for a component library, where AI actually helps), a conference like this compresses a lot of that into two afternoons. And because it's live, you can ask the "wait, why would you do it that way?" questions in real time.
How to get the most out of it as a first-timer
- Skim the agenda first and star 3-4 sessions, rather than trying to watch everything.
- Show up live to the ones you care about so you can ask questions.
- Keep a scratch doc of ideas to try in your own project afterward.
How to register
It's free. Head to: Register Now!
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