Curious about who's visiting my site, I built a user-agent tracker using Vercel middleware and KV storage. It logs every request and displays a live table of user agents and hit counts, refreshing every minute. Check out the code on GitHub!
My QRCode scanner app in China ran into an issue offline: the camera wouldn't start due to a Google Analytics request hanging in the onload event. This highlighted a broader problem of render-blocking third-party assets. If these assets (like scripts) are critical, a slow or failed connection can prevent the page from rendering for over a minute while the browser waits for a timeout. This results in a blank screen for the user. This post explores the impact of render-blocking third-party resources on performance and how optimizing their integration can drastically improve the user experience, particularly in unreliable network conditions.