Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “Create a *.services.yml file within the root directory of the module.”

A block of code is set as follows:

use Drupal\user\Entity\User;
$user = User::load(\Drupal::currentUser()->id());

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

namespace Drupal\my_module\Service;

Any command-line input or output is written as follows:

$ mkdir css
$ cd css

Tips or important notes

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