Summary

In this chapter, we covered a lot of ground for working with menus and menu links. We started by getting an overview of the architecture of the menu system in Drupal 9. I threw many classes and hooks at you because I am a firm believer that the best way to learn is to dig into the code.

We also saw what types of menu links there are in Drupal. We not only have regular links that belong to actual menus, but all sorts of other utility link systems, such as local tasks, local actions, and contextual links.

Then, we got our hands dirty and started with a practical example of how to load menu links in a tree, manipulate them, and finally turn them into a render array. Right after that, we looked at how we can define all these types of menu links and how to understand them if we need to work with them programmatically.

In the next chapter, we will look at one of the most important aspects of any kind of content management framework—the different types of data storage...