Episode 66 of The Web Development Podcast with Fexingo dives into a quiet but costly bug: service workers caching HTML responses with no revalidation, serving users stale pages weeks after an update. Lucas and Luna walk through a real incident where a major e-commerce site served old product listings to returning visitors for 30 days, causing 12% cart abandonment. They explain the Cache-Control headers that matter (`no-cache`, `must-revalidate`), why the `install` and `activate` events don't fix this alone, and how to use the `message` event to force a client-side refresh on deploy. Plus, a subtle tie-in on how listener support keeps the show ad-free and digging into these hidden web issues.

#ServiceWorker #CacheControl #StaleHTML #WebDev #PWA #CacheStrategy #WebPerformance #SWBug #JavaScript #SWR #CacheBusting #TechPodcast #Fexingo #FexingoBusiness #BusinessPodcast #WebDevPodcast #Technology #Frontend

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