As we can see here http://nicolasbize.com/magicsuggest/ for exemple, it will be great to have field which is auto-populate with previous entries.
Precision : yes, select2 library do this partially, but it’s impossible to add an entry to a list.
Thanks for the post.
This is actually possible with PHP through the use of the acf/load_field filter.
You can pull some string values and then pass the result to the target text field within the action.