Hello KVin -
There are a couple of options I can think of
1) Display a skuid popup using the skuid.utils.createPopupFromPopupXML (see https://community.skuid.com/t/trigger-popup-from-javascript?topic-reply-list%5Bsettings%5… for more info).
2) Create a jQuery UI Dialog within your snippet (see https://community.skuid.com/t/are-you-sure-action for more info).
Hope this helps!