The month of May has just ended and pretty much everybody agrees that 2023 is absolutely flying by. Here at Sentry, we’re looking to match the speed of 2023 with our own velocity of new product releases. Here they are in a nutshell.

We’re happy to announce that the Sentry SvelteKit SDK is now generally available and ready to help you monitor your SvelteKit application. Last year, we entered the Svelte ecosystem by creating an SDK for Svelte, which provides support for Svelte single page apps. We knew that SvelteKit was already quite far along back then and we kept a close eye on its development. We also received a lot of requests from the community to support SvelteKit.

How frustrating is it when you’ve just landed on a web page, you click on a certain element and an ad or something else pops up and you end up clicking that thing instead? That’s a layout shift, which is bad for the user’s experience and the later they happen, the worse it is. Research from HTTP Archive shows that over 80% of websites use web fonts. Web fonts also cause layout shifts, if they’re not being loaded strategically.

In our daily lives as developers, we have to deal with a lot of code that we did not write ourselves (or wrote ourselves but already forgot that we did). We use tons of libraries that make our lives easier because they deal with complex stuff like machine learning, time zones, or printing. As a result, much of the code base we work with on a daily basis is a black box to us. But there are times when we need to learn what is happening in that black box.

Users are complaining about slow load times and you’ve thrown logs, traces, and metrics — heck, the entire kitchen sink of performance monitoring — at your application, but you still can’t figure out the source of the bottleneck. Maybe you missed adding instrumentation to something in the critical path, or you’re simply testing in an environment vastly different from the ones your users are experiencing in production.