Peter Kröner is an independent front-end trainer who spends his days reading dry specifications and fighting browser bugs. He teaches developers how web standards actually work under the hood.
Instead of sticking to standard practices, he embraces the weird edges of programming. His presentations uncover JavaScript’s most awful legacy features and show how to exploit obscure ECMAScript loopholes to write valid but delightfully chaotic code.
Videos
Extreme Rules Lawyering with the ECMAScript Specifications
Peter Kröner · Storyblok
World Congress Europe · 2026
Best of the Worst – the most awful anti-features in JavaScript, ranked!
Peter Kröner · Erklärbär Enterprises
World Congress · 2025
Defeat that legacy monster! Guerilla refactoring with web standards
Peter Kröner · Erklärbär Enterprises
World Congress · 2023
Where we're going we don't need JavaScript - Programming with Type Annotations
Peter Kröner · Erklärbär Enterprises
World Congress · 2022
