In the previous chapter, we talked about reusability and how to publish apps on the internet. We also looked into slots and how they can be helpful in extending our Web Components. 

In this chapter, we will look into state management. State management lets you keep track of the state a Web Component is in. It is a very useful technique. We will also be looking into attributes to create even better Web Components. We have been using attributes since Chapter 2, Web Components Life Cycle Callback Methods. But in this chapter, we will look at it from a state management perspective. Then we will be looking into events and event management and how these events can be used to notify users of a Web Component's state.

In this chapter, we will cover the following topics:

• Introduction to State management
• Managing attributes and properties
• Event handling