Why Your Web App Is Redownloading the Same JavaScript

Episode 41 of The Web Development Podcast with Fexingo digs into HTTP caching gone wrong. Lucas explains why most web apps treat JavaScript bundles as immutable when they aren't, causing users to re-download huge chunks of code on every visit. He walks through the difference between cache-control headers like 'no-cache' and 'no-store', explains content hashing done right, and shows how one misconfigured cache header can blow up your Lighthouse score. Luna questions whether CDN edge caching is worth the complexity, and Lucas shares a real case where switching from short-lived to long-lived cache with content hashing cut repeat-load times by 40 percent. They also touch on stale-while-revalidate strategies and why service workers aren't a silver bullet. No fluff, no clickbait — just a drill into one specific performance problem that touches nearly every web app in production. #WebPerformance #HTTPCaching #CacheControl #JavaScript #Frontend #Backend #WebDev #TechPodcast #Lighthouse #CDN #ServiceWorker #ContentHashing #StaleWhileRevalidate #BundleOptimization #FexingoBusiness #BusinessPodcast #Technology #WebDevelopment Keep every episode free: buymeacoffee.com/fexingo