This talk covers why error monitoring is crucial in mobile apps and demonstrates how Sentry’s tools can assist in debugging and improving performance.

We love building new features, but what about the other side of frontend development? Keeping your codebase healthy, managing tech debt, and optimizing performance are just as important. How do you start deleting code, tracking the right metrics, and collaborating with other teams to keep things fast and clean?In this talk, I’ll share practical tips and stories from working on a long-standing website layered with years of web history and various technologies. If you're ready to dive into the essential work of maintaining a frontend, this one’s for you!

Live coding session of using svelte-migrate to refactor the recent changes made to the SvelteKit routes API

Detached DOM elements are invisible memory leaks that accumulate as users navigate your app. This talk explores how to build a production monitoring system that detects and attributes these leaks without impacting performance. We'll examine the architecture and engineering tradeoffs involved in background memory monitoring, explore modern browser APIs for non-blocking work scheduling, and discuss practical patterns for collecting production data at scale. From detection strategies to advanced scheduling techniques, you'll see how to balance observability with user experience in real-world applications.