Hi, I am currently making a list, where users can click the Add-button to add stuffs to the list, and click the Delete-button to delete the selected item.

However, because it starts with an Empty list, I want the Delete-button to disable at first. (see the third line with "<<< check").. then it will enable as long as there is one item in the list. but if the user deletes all the items, it will go back to disable...