Drupal 8 Programmatic Alternate Text

Having alt text on your images is a very good thing for accessibility, and a requirement for a lot of websites in order to comply with WCAG standards for ADA compliance. However, people are not very good at remembering to add alt text or don't think they have the time to craft good alt text. So, what happens is alt gets ignored or bogus content gets put into the field. As a developer I want to help these people do the right thing and, if I can, prevent them from having to do repeitive work.