Drupal 8 | Stef Van Looveren

Add a block class programmically in drupal 8

Small snippet to show how to add a class to your block

How to add javascript to custom form in drupal 8

The way of handling javascript and css is different from drupal 7. This snippet shows how to do it.

Allow adding roles but disallow administrator role on the user registration form [drupal 8]

When you give users the permission to administer users, there is a security implication in that users with this permission can add the role 'administrator' role to any user.

Control block access programmatically in drupal 8

Block access is a powerful way to show or hide content in some contexts. Instead of using contrib modules, this is very easy in small pieces of custom code. The following code prevents access to a block based on a subscription field in the user object.

How to create a settings form to edit and save custom configuration in drupal 8

The following code shows how to create a custom form in the drupal back-end and how to save custom config defined in your custom module. Powerful stuff and very flexible.

You can update custom config with a settings form you build.
In a custom module *custom_mailing* add a file called *custom_mailing.routing.yml* add the following route:

Show the file description in a custom formatter in drupal 8

Custom formatters are great to get precise control over your field output. But I ran into something difficult when trying to output the description of a file field.