feature: tiered sort

lib/ui.js

@@ -11,7 +11,8 @@ import { GridColumn, GridInputColumn, GridDropdownColumn, GridCheckboxColumn, Gr
 import { Popup, createPopup, showAlert, showConfirm } from "./ui/popup";
 import { createPicture, createAudio, createVideo, createFile, createVideoList } from './ui/media';
 import { validation, convertCssStyle } from './ui/extension';
-import { createDateInput, toDateValue, formatDate, setDateValue, getDateValue, DateSelector } from './ui/date';
+import { createDateInput, toDateValue, getFormatter, formatDate, setDateValue, getDateValue, DateSelector } from './ui/date';
+import * as utility from './utility';
 
 export {
   createElement,
@@ -47,6 +48,7 @@ export {
   // dateSelector
   createDateInput,
   toDateValue,
+  getFormatter,
   formatDate,
   setDateValue,
   getDateValue,
@@ -59,5 +61,7 @@ export {
   createVideoList,
   // extension
   validation,
-  convertCssStyle
+  convertCssStyle,
+  // utility
+  utility
 }