PWA

Progressive Web Apps sell reliability: installable shells, offline reads, background sync when the network returns. Angular’s @angular/service-worker makes that easy to turn on. Security does not get the same one-liner. A service worker sits between your app and the network with a long-lived cache — which means it can also sit between an attacker and your users’ private data if you treat “offline” as “store everything.” Industry checklists already call out HTTPS everywhere, including service worker scope, and auth guidance keeps warning against patterns that inflate XSS and CSRF risk when sessions go offline. This post is the Angular-shaped version: enforce TLS and a tight SW scope, cache only what is safe to replay, and keep offline UX without parking bearer tokens in IndexedDB. ...