Creating a list from variables

I am building a project where a user is presented with 16 items. The user sorts the items into one of 2 categories. As they drag items into the container I would the item to appear as the next item in the list. I am using code from this Fruit stand exercise but I can't get it to work.

https://community.articulate.com/discussions/building-better-courses/building-a-text-list-using-variables-9076700d-32e3-4351-b09c-0a333ae871cf?utm_campaign=elh_search&utm_medium=internal&utm_source=elh-referral.

In my example the first 2 items are using javascript but are not updating. The third item is using the built in functionality not javascript, but I can only add a single item using that approach. According to that thread it is not possible to concatenate variables without using Javascript? Is that still true?

Thanks in advance for any help