Building an Offline-First Progressive Web App Without React or Next.js (opens in new tab)

Lessons learned from deploying a production PWA with Service Workers, Firebase Hosting, and vanilla JavaScript. The Problem Most articles about Progressive Web Apps assume you're building yet another to-do app. We weren't. We were building a web application intended to be used in places where connectivity is unreliable: rural areas, retreats, flights, and locations with intermittent mobile coverage. The requirements were straightforward: The application had to remain usable without a network ...