jquery autocomplete

$(document).ready(function() {

  $( "#search-input" ).autocomplete({
    source: function( request, response ) {
      var base_url = window.location.origin;
      var query = request.term;

      if (query.length > 0) {
        $.ajax({
          url: `${base_url}/search/ajax`,
          dataType: "json",
          data: {
            q: query,
          },
          success: function( data ) {
            console.log(data.length)
            response(data);
          }
        });
      }
    },
    _renderItem: function(ul,item) {
      return $("<li>")
        .append("<div>" + item.title + "</div>")
        .appendTo(ul);
    }
  });
});