These are all pretty poor solutions to the problem. I also prefer native controls but when they don't fit your use case I think it is better to make your own th

These are all pretty poor solutions to the problem. I also prefer native controls but when they don't fit your use case I think it is better to make your own than use non-fitting input types. I do agree that most users don't know how to use multi-selects though. For that a list with checkboxes works well and allows rich content.