“query function not defined for Select2 undefined error”

Question

Trying to use Select2 and getting this error on multiple item input/text field:

\"query function not defined for Select2 undefined error\"

Answer 1

In case you initialize an empty input do this:

$(".yourelement").select2({
 data: {
  id: "",
  text: ""
 }
});

Read the first comment below, it explains why and when you should use the code in my answer.