Discover how to enhance web and mobile-web app usability through offline-first functionalities in this conference talk. Explore solutions for caching, in-browser databases, and data replication to ensure a 100% always-on user experience, even in low signal or no connectivity situations. Learn how Web Components can help solve these issues out-of-the-box. Watch a live coding demonstration showcasing the simplicity of manipulating large data completely offline. Gain insights into Progressive Web Apps, mobile devices, caching techniques, CouchDB, and the Polymer CLI. Understand the implementation of local databases, persistence parameters, and querying in offline-first applications.