Building a Video Platform That Works Offline-First

What if your video platform could work even when the user's connection is unreliable? Here's how I implemented offline-first capabilities for TrendVidStream using Service Workers and the Cache API. Why Offline-First for Video? Not all our users have stable connections. TrendVidStream serves 8 regions including countries where mobile internet can be intermittent. Offline-first ensures: Previously visited pages load instantly Navigation works even with spotty connectivity The shell (header, categories, footer) always renders Service Worker Registration // sw-register.js if ( ' serviceWorker ' in navigator ) { window . addEventListener ( ' load ' , async () => { try { const reg = await navigator . serviceWorker . register ( ' /sw.js ' , { scope : ' / ' }); console . log ( ' SW registered: ' , reg . scope ); } catch ( err ) { console . error ( ' SW registration failed: ' , err ); } }); } Service Worker // sw.js const CACHE_NAME = ' tvs-v1 ' ; const SHELL_CACHE = ' tvs-shell-v1 ' ; // App s