I have recently started working on the next version of select2, v5.
The major goal of this rewrite is to make it ADA compliant.
Also I am rewriting it in React (with jquery bridge for those not using React) as it is a really good fit for writing widgets like this and I hope will result in a codebase with less bugs.
You can see what I have so far here: https://github.com/select2/select2/tree/select2-5.x
Feedback is welcome, especially if you are familiar with ADA and can help me test it.
I am not sure if a new repo is better then a new branch because it would make it easier to filter bugs/pull requests, but in either case I have created a 5.x label in the current repo.
Looking forward to getting some feedback.