Drupal 9 Module Development - Third Edition

Chapter 2: Creating Your First Module

Now that we have covered some of the introductory aspects of Drupal module development, it's time to dive right into the meat of what we are doing here—module creation.

Here are some of the important topics that we will cover in this chapter:

• Creating a new Drupal 9 module – the files that are necessary to get started
• Creating a route and controller
• Creating and using a service
• Creating a form
• Creating a custom block
• Working with links
• Using the Event Dispatcher

Concretely, in this chapter, we will create a new custom module called Hello World. In this module, we will define a route that maps to a controller and that outputs this age-old programming message. So, this will be our first win.

Next, we will ...