I built a React skeleton loader that traces your UI automatically. Meet shimmer-trace . 🚀 Live Demo Skeleton loaders are everywhere. Every modern app has them. But if you have ever built one by hand, you know the pain: You copy your real card, replace text with grey boxes. Then your designer changes the padding, and your skeleton looks wrong again. Each grey box has its own shimmer animation, and they all run out of sync, like a broken disco floor. You ship it. Layout shifts. Lighthouse cries. I got tired of this. So I built shimmer-trace — a React library that looks at your real UI, traces the shape of every element, and paints one single shimmer wave across the whole thing. One wrapper. Zero hand-drawn skeletons. Zero layout shift.…