Going Offline

Websites can work without a connection, and this book shows how. Jeremy Keith starts with service workers, the browser scripts that make offline behavior possible, and walks through the code that powers them. He covers the current approaches to building offline pages that still deliver content when a network is unavailable.

The book focuses on the mechanics that matter most: how requests are fetched and stored in a cache, and how those choices affect the speed of a site. Readers learn to use these techniques to improve performance and to design an offline experience that suits users on any kind of connection.

It is aimed at web developers and designers who want their sites to hold up when connectivity is poor or missing.