How to set display value in typeahead.js -


i set twitter typeahead display description different key value.

$('#scrollable-dropdown-menu .typeahead').typeahead({         hint: true,         highlight: true,         minlength: 1     },     {         name: 'searchproduct',         source: bloodhoundds.ttadapter(),         displaykey: 'descr',         valuekey:"productid",         limit: 20     });

how can preselect display value if have productid

i've try

$('.typeahead').val("2200718");

and 

$('.typeahead').typeahead('val', "2200718").trigger('change');

all can see in field id value instead description.


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