- Swag allows building offline-first web apps using Go and HTML without JavaScript.
- It compiles Go handlers and templates to WebAssembly, running them in a Service Worker for local execution after first visit.
- Dual deployment: same app serves HTTP requests natively and as WASM for offline use.
- Features include persistent storage, sync, PWA manifest, and cache versioning.
- Reference apps demonstrate real-time markdown preview and offline social feed reading.