Working with data in Angular can be a common source of frustration and confusion. In this chapter, we will provide recipes for working with internal and external data in your Angular application and show you how to validate and handle errors caused by data.

In this chapter, we will cover the following recipes:

• Working with actions and events in Angular
• Working with form input and models in Angular
• Validating data with Angular form properties
• Creating services for data in Angular
• Using promises to create asynchronous services in Angular
• Retrieving API data using HTTP services in Angular
• Querying API sources using HTTP services in Angular
• Creating Concurrent API requests in Angular
• Handling API errors and invalid responses in Angular
• HTTP service optimization through client-side caching