Progressive Web App (PWA)
A web app with native-app-like features — installable to home screen, offline support via service workers, push notifications.
In long form.
PWA is an umbrella term for capabilities, not a framework. Required: a Web App Manifest (icons, name, theme color), a service worker (background script that intercepts network requests and serves cached responses offline), HTTPS. Optional: push notifications, background sync, offline-first data, install prompts. Browsers vary in PWA install support — Chromium browsers and Safari on iOS support installation via Add to Home Screen. PWAs occupy a useful niche between fully native apps and traditional websites.
Most marketing sites don't need PWA features. Tools, dashboards, and field-use apps where users may have intermittent connectivity (logistics field tools, healthcare worker apps) benefit most from PWA capabilities — especially the service worker offline caching.
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