Most web tools stop working the moment you lose your internet connection. For a table builder used on a train, in a conference room with spotty wifi, or on a flight, this is a real problem. Progressive Web Apps solve this through service workers, a background script that caches the application assets and intercepts network requests. When you open a PWA without internet access, the service worker serves the cached version of the app. The tool works exactly as it does online. Tablesmit...