Hi Alex:
Wix Code is targeted at developers so there is an implicit assumption that folks that use it are familiar with Javascript. That being said, in some cases it is hard to avoid wix code with the rich set of resources Wix delivers.
What is your javascript experience? If you don’t have any then it is a good idea to find good educational resources such as w3schools. w3schools has a free javascript training/reference site that can help you get familiar with some of the basics.
I like your suggestion and it is something for Wix to consider. In the meantime is there a specific problem you need to solve on your site related to searches and drop down use?