jQuery - Append a Value to a INPUT, keeping it a Comma Delimited list

Question

I have an input like follows:

I\'d like to be able to append a value to th

Answer 1

I believe the .append() function is exactly for this purpose. I just tried:

$("#attachment-uuids").append(new_val); 

to append values to a field. This works and "attachment-uuids" is populated with CSVs, as required.