Update README.md

README.md

@@ -23,51 +23,53 @@ A collection of awesome browser-side [JavaScript](https://developer.mozilla.org/
   - [Spreadsheet](#spreadsheet)
   - [Editors](#editors)
   - [Documentation](#documentation)
-  - [Files](#files)
-  - [Functional Programming](#functional-programming)
-  - [Reactive Programming](#reactive-programming)
-  - [Data Structure](#data-structure)
-  - [Date](#date)
-  - [String](#string)
-  - [Number](#number)
-  - [Storage](#storage)
-  - [Color](#color)
-  - [I18n And L10n](#i18n-and-l10n)
-  - [Control Flow](#control-flow)
-  - [Routing](#routing)
-  - [Security](#security)
-  - [Log](#log)
-  - [RegExp](#regexp)
-  - [Voice Command](#voice-command)
-  - [API](#api)
-  - [Streaming](#streaming)
-  - [Vision Detection](#vision-detection)
-  - [Machine Learning](#machine-learning)
-  - [Browser Detection](#browser-detection)
-  - [Operating System](#operating-system)
-  - [Benchmark](#benchmark)
-  - [Code highlighting](#code-highlighting)
-  - [Loading Status](#loading-status)
-  - [Validation](#validation)
-  - [Keyboard Wrappers](#keyboard-wrappers)
-  - [Tours And Guides](#tours-and-guides)
-  - [Notifications](#notifications)
-  - [Sliders](#sliders)
-  - [Range Sliders](#range-sliders)
-  - [Form Widgets](#form-widgets)
-    - [Input](#input)
-    - [Calendar](#calendar)
-    - [Select](#select)
-    - [File Uploader](#file-uploader)
-    - [Other](#other)
-  - [Tips](#tips)
-  - [Modals and Popups](#modals-and-popups)
-  - [Scroll](#scroll)
-  - [Menu](#menu)
-  - [Table/Grid](#tablegrid)
-  - [Frameworks](#frameworks)
-  - [Boilerplates](#boilerplates)
-  - [Images](#images)
+  - Utilities
+    - [Files](#files)
+    - [Functional Programming](#functional-programming)
+    - [Reactive Programming](#reactive-programming)
+    - [Data Structure](#data-structure)
+    - [Date](#date)
+    - [String](#string)
+    - [Number](#number)
+    - [Storage](#storage)
+    - [Color](#color)
+    - [I18n And L10n](#i18n-and-l10n)
+    - [Control Flow](#control-flow)
+    - [Routing](#routing)
+    - [Security](#security)
+    - [Log](#log)
+    - [RegExp](#regexp)
+    - [Voice Command](#voice-command)
+    - [API](#api)
+    - [Streaming](#streaming)
+    - [Vision Detection](#vision-detection)
+    - [Machine Learning](#machine-learning)
+    - [Browser Detection](#browser-detection)
+    - [Operating System](#operating-system)
+    - [Benchmark](#benchmark)
+  - UI
+    - [Code highlighting](#code-highlighting)
+    - [Loading Status](#loading-status)
+    - [Validation](#validation)
+    - [Keyboard Wrappers](#keyboard-wrappers)
+    - [Tours And Guides](#tours-and-guides)
+    - [Notifications](#notifications)
+    - [Sliders](#sliders)
+    - [Range Sliders](#range-sliders)
+    - [Form Widgets](#form-widgets)
+      - [Input](#input)
+      - [Calendar](#calendar)
+      - [Select](#select)
+      - [File Uploader](#file-uploader)
+      - [Other](#other)
+    - [Tips](#tips)
+    - [Modals and Popups](#modals-and-popups)
+    - [Scroll](#scroll)
+    - [Menu](#menu)
+    - [Table/Grid](#tablegrid)
+    - [Frameworks](#frameworks)
+    - [Boilerplates](#boilerplates)
+    - [Images](#images)
   - [Gesture](#gesture)
   - [Maps](#maps)
   - [Video/Audio](#videoaudio)