The primary role of a front-end web application is to provide an interface for the display and manipulation of data. This data handling aspect is provided in Angular through its use of Observables and data-binding between internal data model representations and the templated views of your application.

In this chapter we will explore the range of interactions with data that Angular supports, including user input, events, shared data services, and most importantly, loading content from external APIs. We will cover some of the most common types of data manipulation in Angular, as well as cover some more advanced topics such as error handling, concurrency and caching strategies for your data.