customElements & beyond: a lean way to build reactive apps in vanillaJS

Abstract

You know when people tell you that without a framework you can’t build a “real” app? Well… spoiler alert: that’s a lie.
Custom Elements are no longer a toy for old-school HTML addicted, they’re the gateway to a whole new way of building apps: lightweight, accessible, and blazing fast.
And the best part? No endless npm install marathons required.

In this talk we’ll explore cutting-edge browser APIs like Observable Signals, Constructable Stylesheets, and more, showing how to make your native components do their magic like they’re powered by a framework… but without the framework.

It’s a journey into reactivity, semantics, and the future of the web, because vanillaJS isn’t old school, it’s the next level.