typeahead, you pass the plugin method one or
more datasets. The source of a dataset is responsible for computing a set of
suggestions for a given query.
Bloodhound, the typeahead.js suggestion engine.
Bloodhound is stack, flexible, and offers advanced functionalities such as
prefetching, intelligent caching, fast lookups, and backfilling with remote
data.
minLength option to 0 and having the source return suggestions for
empty queries.
saperate titles, managed in templates option.
This looks like a <optgroup> titles in selects.
div with custom css styles and change necessary css
properties or change it in css directly.