autosuggest.js

var acs_action = 'myprefix_autocompletesearch';
    $("#autosearch").autocomplete({
        source: function(req, response){
            $.getJSON(AUTOSEARCH.ajaxurl+'?callback=?&action='+acs_action, req, response);
        },
        select: function(event, response) {
            $('#added-posts').append( '<li id="' + response.item.id + '">' + response.item.label + '<i class="fa fa-pencil"></i><i class="fa fa-times"></i></li>' );
            $("#autosearch_posts").attr( "value", response.item.id );
            $(this).val(''); return false;
        },
        minLength: 3
    });