In this article we’ve seen how easy it is to create a field formatter and extend default behaviour in Drupal 8. We’ve only touched on overriding the viewElements() of this plugin but we can do much more to further customise things. You are also not required to extend the ImageFormatter. There are plenty of existing plugins you can either extend from or use as an example.

Now that I had a working voice coil (driver) ready for mounting on the plate reverb unit, it is time to fabricate a coupling link that will directly connect the driver to the plate. But first, I need to do something with this mess I made while performing that gruesome surgery on our patient. A quick sweeping with my trusty broom and......wait a minute - broom - broom handle... Perfect! A broom handle is the right size for making a driver coupling link.

TeX and LaTeX are well suited to producing electronically publishable documents. What is likely to be a continuing need is to translate LaTeX documents into standard electronic book format, notably ePub, which is the format adopted by most electronic reader publishers except the biggest one (you know who). 1  What is ePub? You don't really want to know what the ePub standard is. And you are not going to find out much here. In short, though, an ePub book is a XHTML1 version of the book packaged together with its figures and other resources into a zip file.

Good instruction on basic setup and terminology