JS Days 2026 is a free, online, two-day JavaScript conference on September 16–17 — 8+ talks on AI-assisted development, enterprise JS, UI/React, and low-code. Full disclosure: I'm on the team at Sencha that helps run it, so I'm biased — but the lineup is genuinely worth a look, and it costs nothing.
Every year there are a handful of free online conferences actually worth showing up for. JS Days 2026 is one I keep coming back to, and the 2026 lineup just dropped — so here's what caught my eye, whether or not you end up registering.
What's actually interesting this year
A few themes run through the talks that are worth thinking about even outside the event:
AI is moving from autocomplete to actual agents. There's a session on building custom AI agents in JavaScript with React (Marc Gusmano), and another on generating whole apps on top of an existing database with AI (Pavel Perminov). The shift worth noticing: less "AI writes a function," more "AI wires up a working app and you steer it."
Big data in the browser is still hard — and solvable. Rafael Méndez has a talk on techniques for handling large datasets in Ext JS — virtual scrolling, buffered rendering, the stuff that keeps a 100k-row grid from nuking your frame rate. If you've ever watched a table freeze the tab, this one's for you.
Low-code isn't the enemy anymore. Day 2 has a whole track on low-code and rapid app development — the pragmatic "ship the internal dashboard this week" angle, not the "replace developers" hype.
The basics
When: Sept 16–17, 2026 · Where: online · Cost: free
Format: Day 1 opens with a keynote (James Cahill, Sencha GM) + 45-min sessions; Day 2 splits into low-code, UI, and React tracks
**Scale: 4th year, 5,000+ developers, 8+ talks
Should you go?
If you write JavaScript, work on enterprise or data-heavy UIs, or you're trying to place AI sensibly in your workflow — it's an easy two afternoons. And because it's live, you can actually ask the speakers things, which is the part that recordings never replace.
Register free here → Register now
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