How to implement search autocomplete for specific content types? How to implement search autocomplete it should show suggestions for specific content type only suppose recipe and collection .

I have used search exclude(node) module for searching nodes of specific content types.

But i am not able to figure out how to add search autocomplete programatically  or by using some module.
Create a new view of content. Click on + Add  select Autocompletion Callback and add a path/url to it.

In Filter add Type filter so only shows certain content types. 

In /admin/config/search/search_autocomplete edit the search block

For WHAT - WHAT TO DISPLAY IN SEARCH AUTOCOMPLETE SUGGESTIONS? change this to your view's autocompletion callback.

For more info read the documentation.