Conventions used

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

CodeInText: 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: "Custom Drupal 8 modules typically belong inside the /custom directory of the /modules folder found inside the root Drupal installation."

A block of code is set as follows:

name: Hello World
 description: Hello World module
 type: module
 core: 8.x
 package: Custom

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

cd core

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Users can now reach this page from the module administration page by clicking on the Help link for each individual module that has this hook implemented."

Warnings or important notes appear like this.

Tips and tricks appear like this.