Filter prefetched data while using twitter typeahead plugin

Question

I have two input fields on my page: country and city. First one contains 100 choices and second - 2000 choices. I want to use prefetch option in typeahead plugin, because these input fields are being reused on other pages.

Then I want to filter prefetched data while typing in city input. How can I do that?

Simple answer is to use remote option of typeahead, populate url with 'country' parameter and filter data on server side. Works great but I want to use prefetch data stored on client.

Second answer is to listen to 'typeahead:selected' event and show alert message if city doesn't correspond to country. It is bad solution.

So how can I filter prefetched data?

Answer 1

The solution can be found in this commit. Just use suggestionsCallback function to filter your suggests.