Drag&Drop is not supported in VELO.
There is no existing API for this feature i know.
If you are working with a DropDown, then take a look here…
https://www.wix.com/velo/reference/$w/dropdown
You can control the loadings of your HTML directly from your DATABASE.
- This for you will have first to create setup a DATABASE.
- Next step would be to use either a DATASET, which would be connected to your dataset, or using Wix-Data-API if you want to go the CODING-WAY.
- …
Since i do not completely know hwat exactly you are trying to achieve it is hard to give you any specific advise.
The dropdown gives you 2 different possibilities how to work with it’s data…
https://www.wix.com/velo/reference/$w/dropdown/selectedindex
Use one of these for your purposes.