Stop Losing Your API Calls: Build a Production-Ready Browser Cache in 5 Minutes

If you've ever opened DevTools and watched the same API call fire over and over again — for data that hasn't changed in hours — this article is for you. I've been there. A dashboard that re-fetches user profiles on every tab switch. A product page that hits the database every single render. A PWA that breaks the moment the user goes offline. The solution isn't complicated. It's caching. But doing it right in the browser — persistent, smart, secure — is where things get interesting. That's why I