twitter-bootstrap – Twitter Bootstrap：没有匹配的Typeahead功能

var newusertext = 'New user';
var newuserlink = '/add/user/0';

$.fn.typeahead.Constructor.prototype.process = function (items) {
      var that = this

      items = $.grep(items,function (item) {
        return that.matcher(item)
      })

      items = this.sorter(items)

      if (!items.length) {
         return this.rendernonmatch().show()
      }

      return this.render(items.slice(0,this.options.items)).show()
    } 


$.fn.typeahead.Constructor.prototype.rendernonmatch = function () {
      var that = this
      var items = new Array();
      items.push(newusertext)
      items = $(items).map(function (i,item) {
        i = $(that.options.item).attr('data-value',item)
        i.find('a').html(that.Highlighter(item))
        return i[0]
      })
      items.first().addClass('active')
      this.$menu.html(items)
      return this
    }

/* redirect to the registration page to add a new user */    
$.fn.typeahead.Constructor.prototype.updater = function (item) {
      if(item === newusertext){ window.LOCATIOn =  newuserlink; return}
      return item
    }

见：http://bootply.com/66630