PWA (Progressive Web App) – What It Is and How to Build One
Buildifyer··11 min read
PWA – Progressive Web App
A PWA is a web app that uses a service worker to cache assets and work offline to some degree, and a web app manifest so it can be added to the home screen and open in full screen. Users get an app-like experience without downloading from a store.
Main pieces
- manifest.json – app name, icons (192x192, 512x512), start_url, display (standalone/fullscreen), theme_color. The browser shows “Add to home screen”.
- Service worker – a JS file registered by the page. Controls caching (cache-first, network-first) and allows showing cached content offline.
- HTTPS – required for service workers.
Next.js and PWA
With plugins like next-pwa or manual Workbox integration you can generate a service worker and serve the manifest. Static pages are easy to cache; for dynamic ones you decide what stays available offline.
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