How to add superscript 2 as text in textGroupItem with Javascript

Dear All,

I've been trying to add and remove certain pieces of text based on their font and whenever I need to add a certain piece of text back into it's original place again I need to insert a superscript 2 after this text.

This is the piece of code in which I add the text back in again:

if (textGroupItem.textRange.characterAttributes.textFont.toString().toLowerCase().match(regPattern)){

                textGroupItem.textRange.characters.removeAll()

                textGroupItem.textRange.characters.add(un + " - " + sm + "m" + "²")

}

This doens't give a superscript 2 but some kind of broken token as text.

So far i've also tried:

- translatePlaceholderText("c2b2")

- "2".sup()

-  ²

- textGroupItem.textRange.characterAttributes.baselineShift = height;  <-- height = 2 but this shifts the whole text item

How can you succesfully add a supercript 2 to a group of characters?