If you need to build an offline web application, you are going to need a way to store your data locally. There are many options for storing data, but using a client-side database provides you with the most options. PouchDB is a great tool for storage. PouchDB provides a consistent API across browsers. It uses a promise-based approach as opposed to a callback approach. This simplifies your code immensely. You will learn the basics of working with offline data in this interactive seminar.