I went to jQuery UI download site
https://jqueryui.com/download/all/, I see for each version there is a jQuery-UI zip and a jQuery-UI-Theme zip for download. I found if I only download jQuery-UI it works in my code along with jQuery that I already have. I think the theme zip is for people who want to specify certain theme in their code and in that case the zip provides the specific .css for that theme. But if I don't download the theme part, does that mean I am using
default theme jQuery UI provides ? plus, I know there a customizing jQuery-UI site to download a customized version, but I don't really need to customize anything so I just go with the easiest way here downloading the standard jQuery-UI.