Site search with preview dropping down


For my site, i want to have a site search in the nav bar.

However, I would like to have the results immediately appearing underneath as the person is typing, or similar to the search functionality on actually!

Can this be done with the standard search site, or is a plugin needed?


Here is my site Read-Only: LINK
(how to share your site Read-Only link)

You’d need a plug-in, and some sort of 3rd party indexing functionality.