Clear typeahead field

try with this, example here in fiddle

$('.typeahead').typeahead().bind('typeahead:close', function () {
    $('.typeahead').typeahead('val', '');
});

The accepted answer is now out of date. See the latest Typeahead documentation to see that trapping the "close" event and setting the value of the input are different. Here's an equivalent, updated answer:

$('.typeahead').typeahead().bind('typeahead:close', function() {
    $('.typeahead').typeahead('val', '');
});