Alter typeahead to accept synchronous/asynchronous data source via function/callback

js/bootstrap-typeahead.js

@@ -77,9 +77,7 @@
     }
 
   , lookup: function (event) {
-      var that = this
-        , items
-        , q
+      var items
 
       this.query = this.$element.val()
 
@@ -87,7 +85,15 @@
         return this.shown ? this.hide() : this
       }
 
-      items = $.grep(this.source, function (item) {
+      items = $.isFunction(this.source) ? this.source(this.query, $.proxy(this.process, this)) : this.source
+
+      return items ? this.process(items) : this
+    }
+
+  , process: function (items) {
+      var that = this
+
+      items = $.grep(items, function (item) {
         return that.matcher(item)
       })
 
@@ -282,4 +288,4 @@
     })
   })
 
-}(window.jQuery);
+}(window.jQuery);