In the last three blog posts in this series, you created a PouchDB database and modified documents within it. You learned to search for documents within the database using allDocs() and find(). In this fourth part of our ongoing series on PouchDB, you learn to use map queries and the query() method.
As more and more users interact with web applications on their mobile devices, it is becoming increasingly important for us to allow them to work offline. There are many cases where users need to work offline, such as on an airplane, in a remote location where there is no cellular access, or perhaps on board a large ship where Wi-Fi is not available. If you can store data local to your web application, the user can continue to work even without a connection.