We use a Term Reference Tree widget to display a field on our user registration/user edit forms. Accessibility is an important factor for our site, and the fact that the term reference tree can't be expanded with the keyboard was flagged as an issue.
I used an existing issue, Cannot expand tree using just a keyboard 🐛 Cannot expand tree using just a keyboard Active , as the basis for my solution but applied it to the 2.0.x version of the module.
Set a field on a form display to Term reference tree. Use the following settings:
I'll attach a patch that'll do the following:
TBD
Add the ability to use the keyboard to navigate the term reference tree widget.
Active
2.0
User interface
It affects the ability of people with disabilities or special needs (such as blindness or color-blindness) to use Drupal.
Patch attached.
I should specify that I'm not completely sure my approach is the right one. I'm absolutely open to any and all feedback, improvements, etc.
New version of the patch attached. This version corrects an issue where the behavior triggered twice when the spacebar was pressed, but only once when the enter or mouse buttons were pressed.