Progressive Web App Learn PWA in baby steps Code editor Visual Studio Code (https://code.visualstudio.com/download) Chrome plugin for local server ApplicationWeb Server for Chrome (https://chrome.google.com/webstore/detail/web-server-for-chrome/ofhbbkphhbklhfoeikjpcbhemlocgigb) References: https://developers.google.com/web/fundamentals/codelabs/your-first-pwapp/ https://developers.google.com/web/fundamentals/architecture/app-shell https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers https://jakearchibald.com/2014/offline-cookbook/