Drupal 8 Module Development

The form

So, now, our page displays a greeting dynamically depending on the time of day. However, we now want an administrator to specify what the greeting should actually be, in other words, to override the default behavior of our salutation if they so choose.

The ingredients for achieving this will be as follows:

• A route (a new page) that displays a form that the administrator can add the greeting with
• A configuration object that will store the greeting

In building this functionality, we will also take a look at how to add a dependency to our existing service. So, let's get started with our new route that naturally goes inside the hello_world.routing.yml file:

hello_world.greeting_form:  path: '/admin/config/salutation-configuration'