Release 0.5.8

1. Improve mouse handler logic.
2. Add rail margin detection.
3. Add swipePropagation option.
4. Bug fixes.

.jshintrc

@@ -27,7 +27,7 @@
 
     "asi"           : false,
     "laxbreak"      : false,
-    "bitwise"       : true,
+    "bitwise"       : false,
     "boss"          : false,
     "curly"         : true,
     "eqeqeq"        : true,

Gruntfile.js

@@ -1,13 +1,13 @@
 'use strict';
 
 module.exports = function (grunt) {
+  require('load-grunt-tasks')(grunt);
 
   // Project configuration.
   grunt.initConfig({
     // Metadata.
     pkg: grunt.file.readJSON('perfect-scrollbar.jquery.json'),
-    version: grunt.file.readJSON('package.json').version,
-    banner: '/*! <%= pkg.title || pkg.name %> - v<%= version %>\n' +
+    banner: '/*! <%= pkg.title || pkg.name %> - v<%= pkg.version %>\n' +
       '<%= pkg.homepage ? "* " + pkg.homepage + "\\n" : "" %>' +
       '* Copyright (c) <%= grunt.template.today("yyyy") %> <%= pkg.author.name %>;' +
       ' Licensed <%= _.pluck(pkg.licenses, "type").join(", ") %> */\n',
@@ -39,15 +39,6 @@ module.exports = function (grunt) {
         src: 'src/perfect-scrollbar.js'
       }
     },
-    csslint: {
-      strict: {
-        options: {
-          csslintrc: '.csslintrc',
-          'import': 2
-        },
-        src: ['src/perfect-scrollbar.css']
-      }
-    },
     cssmin: {
       options: {
         banner: '<%= banner %>'
@@ -59,16 +50,25 @@ module.exports = function (grunt) {
         dest: 'min/',
         ext: '.min.css'
       }
+    },
+    bump: {
+      options: {
+        files: ['package.json', 'bower.json', 'perfect-scrollbar.jquery.json'],
+        updateConfigs: ['pkg'],
+        commit: false,
+        createTag: false,
+        push: false
+      }
+    },
+    sass: {
+      dist: {
+        files: {
+          'src/perfect-scrollbar.css': 'src/perfect-scrollbar.scss'
+        }
+      }
     }
   });
 
-  // These plugins provide necessary tasks.
-  grunt.loadNpmTasks('grunt-contrib-uglify');
-  grunt.loadNpmTasks('grunt-contrib-jshint');
-  grunt.loadNpmTasks('grunt-contrib-clean');
-  grunt.loadNpmTasks('grunt-contrib-csslint');
-  grunt.loadNpmTasks('grunt-contrib-cssmin');
-
   grunt.registerTask('default', 'List commands', function () {
     grunt.log.writeln("");
 
@@ -76,8 +76,11 @@ module.exports = function (grunt) {
     grunt.log.writeln("Run 'grunt build' to minify the source files");
   });
 
-  grunt.registerTask('lint', ['jshint', 'csslint']);
-  grunt.registerTask('build', ['clean', 'uglify', 'cssmin']);
+  grunt.registerTask('lint', ['jshint']);
+  grunt.registerTask('build', ['clean', 'uglify', 'sass', 'cssmin']);
   grunt.registerTask('travis', ['lint']);
-
+  grunt.registerTask('release', 'Release a new version', function (arg) {
+    var bumpType = arg ? ':' + arg : '';
+    grunt.task.run(['lint', 'bump' + bumpType, 'build']);
+  });
 };

README.md

@@ -44,16 +44,24 @@ You can download the latest stable version with download links in [Github Page](
 If you want to use the development version of the plugin, use the source files which are not minified. They're in the `src` directory. The development version may be unstable, but some known bugs can be fixed.
 
 ```
-git clone https://github.com/noraesae/perfect-scrollbar.git
-cd perfect-scrollbar/src
+$ git clone https://github.com/noraesae/perfect-scrollbar.git
+$ cd perfect-scrollbar/src
 ```
 
 You can use [Bower](http://bower.io/) to install the plugin. The plugin is registered as `perfect-scrollbar`.
 
 ```
-bower install perfect-scrollbar
+$ bower install perfect-scrollbar
 ```
 
+It's registered on [npm](https://www.npmjs.org/package/perfect-scrollbar) as `perfect-scrollbar`.
+
+```
+$ npm install perfect-scrollbar
+```
+
+You can also load it from [cdnjs](http://cdnjs.com/). It is registered as [`jquery.perfect-scrollbar`](http://www.cdnjs.com/libraries/jquery.perfect-scrollbar).
+
 Requirements
 ------------
 
@@ -78,10 +86,12 @@ The scroll speed applied to mousewheel event.
 **Default: 1**
 
 ### wheelPropagation
-If this option is true, when the scroll reach the end of the side, mousewheel event will be propagated to parent element.  
-*Currently not supported for touch events*  
+If this option is true, when the scroll reaches the end of the side, mousewheel event will be propagated to parent element.  
 **Default: false**
 
+### swipePropagation
+If this option is true, when the scroll reaches the end of the side, touch scrolling will be propagated to parent element.  
+**Default: true**
 
 ### minScrollbarLength
 When set to an integer value, the thumb part of the scrollbar will not shrink below that number of pixels.  
@@ -125,8 +135,8 @@ How to Use
 ```html
 <style>
   #Demo { 
-    position: 'relative';
-    height: 100%; // Or whatever you want (eg. 400px)
+    position: relative;
+    height: 100%; /* Or whatever you want (eg. 400px) */
     overflow: hidden;
   }
 </style>
@@ -184,11 +194,9 @@ For IE problems, please refer to [IE Support](https://github.com/noraesae/perfec
 IE Support
 ----------
 
-This plugin supports old IE browsers in the **minimum** range. The plugin is tested in IEs >= IE6 and works(not well, but works).
+The plugin would work in IEs >= IE9(not well, though).
 
-**But the project will not accept the patches to fix IE problems in IE 6/7/8.**
-
-From jQuery 2.0, jQuery also will not support IE 6/7/8. I also think that supporting old browsers really breaks the web development conventions.
+**The patches to fix problems in IE<=8 won't be accepted.**
 
 When old IEs should be supported, please fork the project and make patches personally.
 
@@ -197,6 +205,8 @@ Helpdesk
 
 If you have any idea to improve this project or any problem using this, please feel free to upload an [issue](https://github.com/noraesae/perfect-scrollbar/issues).
 
+For the problems frequently asked, there's a [FAQ](https://github.com/noraesae/perfect-scrollbar/wiki/FAQ) wiki page. Please check the page before uploading an issue.
+
 License
 -------
 

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "perfect-scrollbar",
-  "version": "0.5.2",
+  "version": "0.5.8",
   "homepage": "http://noraesae.github.io/perfect-scrollbar/",
   "authors": [
     "Hyunje Alex Jun <me@noraesae.net>"

examples/always-visible.html

@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <title>perfect-scrollbar example</title>
+      <link href="../src/perfect-scrollbar.css" rel="stylesheet">
+      <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
+      <script src="../src/perfect-scrollbar.js"></script>
+      <style>
+        h1 { text-align: center; }
+        .container { position:relative; margin:0px auto; padding:0px; width: 600px; height: 400px; overflow: hidden; }
+        .container .content { background-image: url('./azusa.jpg'); width: 1280px; height: 720px; }
+      </style>
+      <style>
+        /* to make scrollbars always visible */
+        .always-visible.ps-container > .ps-scrollbar-x-rail,
+        .always-visible.ps-container > .ps-scrollbar-y-rail {
+          opacity: 0.6;
+        }
+      </style>
+    <script>
+      jQuery(document).ready(function ($) {
+        "use strict";
+        $('.container').perfectScrollbar();
+      });
+    </script>
+  </head>
+  <body>
+    <h1>Default</h1>
+    <div class="container">
+      <div class="content">
+      </div>
+    </div>
+
+    <h1>Always visible</h1>
+    <div class="container always-visible">
+      <div class="content">
+      </div>
+    </div>
+  </body>
+</html>

examples/iframe-content.html

@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <title>perfect-scrollbar example</title>
+      <link href="../src/perfect-scrollbar.css" rel="stylesheet">
+      <style>
+        .contentHolder { position:relative; margin:0px auto; padding:0px; width: 600px; height: 400px; overflow: hidden; }
+        .contentHolder .content { background-image: url('./azusa.jpg'); width: 1280px; height: 720px; }
+        .spacer { text-align:center }
+      </style>
+  </head>
+  <body>
+    <div id="Default" class="contentHolder">
+      <div class="content">
+      </div>
+    </div>
+  </body>
+</html>
+

examples/iframe.html

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <title>perfect-scrollbar example</title>
+      <link href="../src/perfect-scrollbar.css" rel="stylesheet">
+      <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
+      <script src="../src/perfect-scrollbar.js"></script>
+      <style>
+        #iframe { width: 100%; min-height: 450px; border: 0; }
+        html { direction: rtl; }
+      </style>
+    <script>
+      jQuery(document).ready(function ($) {
+        "use strict";
+        $('#iframe').load(function() {
+          var contentIframe = $(this).contents();
+          var documentIframe = contentIframe.get(0);
+          $('#Default', documentIframe).perfectScrollbar();
+        });
+      });
+    </script>
+  </head>
+  <body>
+    <iframe src="iframe-content.html" id="iframe"></iframe>
+  </body>
+</html>

examples/removable-list-element.html

@@ -0,0 +1,52 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+
+    <title>perfect-scrollbar example</title>
+    <link href="../src/perfect-scrollbar.css" rel="stylesheet">
+    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
+    <script src="../src/perfect-scrollbar.js"></script>
+    <style>
+      #test {
+        border: 1px solid gray;
+        max-height: 300px;
+        width: 400px;
+        overflow: hidden;
+        position: relative;
+      }
+      #test .element {
+        margin: 1px;
+        background-color: #cec;
+        height: 44px;
+        line-height: 44px;
+      }
+    </style>
+    <script type="text/javascript">
+      $(document).ready(function ($) {
+        var test = $('#test');
+        test.perfectScrollbar();
+        test.find('a').click(function () {
+          $(this).parent().remove();
+          test.perfectScrollbar('update');
+        });
+      });
+    </script>
+  </head>
+  <body>
+    <div id="test" class="wrapper">
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+      <div class='element'>Hello! Click <a href='#'>here</a> to remove this!</div>
+    </div>
+  </body>
+</html>

examples/scrollbars-with-margin.html

@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <title>perfect-scrollbar example</title>
+      <link href="../src/perfect-scrollbar.css" rel="stylesheet">
+      <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
+      <script src="../src/perfect-scrollbar.js"></script>
+      <style>
+        .contentHolder { position:relative; margin:0px auto; padding:0px; width: 600px; height: 400px; overflow: hidden; }
+        .contentHolder .content { background-image: url('./azusa.jpg'); width: 1280px; height: 720px; }
+        .spacer { text-align:center }
+
+        .ps-scrollbar-x-rail {
+          margin: 0 3px;
+        }
+        .ps-scrollbar-y-rail {
+          margin: 3px 0;
+        }
+      </style>
+    <script>
+      jQuery(document).ready(function ($) {
+        "use strict";
+        $('#Default').perfectScrollbar();
+      });
+    </script>
+  </head>
+  <body>
+    <div id="Default" class="contentHolder">
+      <div class="content">
+      </div>
+    </div>
+  </body>
+</html>

min/perfect-scrollbar.min.css

@@ -1,5 +1,5 @@
-/*! perfect-scrollbar - v0.5.2
+/*! perfect-scrollbar - v0.5.8
 * http://noraesae.github.com/perfect-scrollbar/
 * Copyright (c) 2014 Hyunje Alex Jun; Licensed MIT */
 
-.ps-container .ps-scrollbar-x-rail{position:absolute;bottom:3px;height:8px;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;opacity:0;filter:alpha(opacity=0);-o-transition:background-color .2s linear,opacity .2s linear;-webkit-transition:background-color .2s linear,opacity .2s linear;-moz-transition:background-color .2s linear,opacity .2s linear;transition:background-color .2s linear,opacity .2s linear}.ps-container:hover .ps-scrollbar-x-rail,.ps-container.hover .ps-scrollbar-x-rail{opacity:.6;filter:alpha(opacity=60)}.ps-container .ps-scrollbar-x-rail:hover,.ps-container .ps-scrollbar-x-rail.hover{background-color:#eee;opacity:.9;filter:alpha(opacity=90)}.ps-container .ps-scrollbar-x-rail.in-scrolling{background-color:#eee;opacity:.9;filter:alpha(opacity=90)}.ps-container .ps-scrollbar-y-rail{position:absolute;right:3px;width:8px;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;opacity:0;filter:alpha(opacity=0);-o-transition:background-color .2s linear,opacity .2s linear;-webkit-transition:background-color .2s linear,opacity .2s linear;-moz-transition:background-color .2s linear,opacity .2s linear;transition:background-color .2s linear,opacity .2s linear}.ps-container:hover .ps-scrollbar-y-rail,.ps-container.hover .ps-scrollbar-y-rail{opacity:.6;filter:alpha(opacity=60)}.ps-container .ps-scrollbar-y-rail:hover,.ps-container .ps-scrollbar-y-rail.hover{background-color:#eee;opacity:.9;filter:alpha(opacity=90)}.ps-container .ps-scrollbar-y-rail.in-scrolling{background-color:#eee;opacity:.9;filter:alpha(opacity=90)}.ps-container .ps-scrollbar-x{position:absolute;bottom:0;height:8px;background-color:#aaa;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;-o-transition:background-color .2s linear;-webkit-transition:background-color.2s linear;-moz-transition:background-color .2s linear;transition:background-color .2s linear}.ps-container.ie6 .ps-scrollbar-x{font-size:0}.ps-container .ps-scrollbar-x-rail:hover .ps-scrollbar-x,.ps-container .ps-scrollbar-x-rail.hover .ps-scrollbar-x{background-color:#999}.ps-container .ps-scrollbar-y{position:absolute;right:0;width:8px;background-color:#aaa;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;-o-transition:background-color .2s linear;-webkit-transition:background-color.2s linear;-moz-transition:background-color .2s linear;transition:background-color .2s linear}.ps-container.ie6 .ps-scrollbar-y{font-size:0}.ps-container .ps-scrollbar-y-rail:hover .ps-scrollbar-y,.ps-container .ps-scrollbar-y-rail.hover .ps-scrollbar-y{background-color:#999}.ps-container.ie .ps-scrollbar-x,.ps-container.ie .ps-scrollbar-y{visibility:hidden}.ps-container.ie:hover .ps-scrollbar-x,.ps-container.ie:hover .ps-scrollbar-y,.ps-container.ie.hover .ps-scrollbar-x,.ps-container.ie.hover .ps-scrollbar-y{visibility:visible}
+.ps-container.ps-active-x>.ps-scrollbar-x-rail,.ps-container.ps-active-y>.ps-scrollbar-y-rail{display:block}.ps-container>.ps-scrollbar-x-rail{display:none;position:absolute;-webkit-border-radius:4px;-moz-border-radius:4px;-ms-border-radius:4px;border-radius:4px;opacity:0;-ms-filter:"alpha(Opacity=0)";filter:alpha(opacity=0);-webkit-transition:background-color .2s linear,opacity .2s linear;-moz-transition:background-color .2s linear,opacity .2s linear;-o-transition:background-color .2s linear,opacity .2s linear;transition:background-color .2s linear,opacity .2s linear;bottom:3px;height:8px}.ps-container>.ps-scrollbar-x-rail>.ps-scrollbar-x{position:absolute;background-color:#aaa;-webkit-border-radius:4px;-moz-border-radius:4px;-ms-border-radius:4px;border-radius:4px;-webkit-transition:background-color .2s linear;-moz-transition:background-color .2s linear;-o-transition:background-color .2s linear;transition:background-color .2s linear;bottom:0;height:8px}.ps-container>.ps-scrollbar-x-rail.in-scrolling{background-color:#eee;opacity:.9;-ms-filter:"alpha(Opacity=90)";filter:alpha(opacity=90)}.ps-container>.ps-scrollbar-y-rail{display:none;position:absolute;-webkit-border-radius:4px;-moz-border-radius:4px;-ms-border-radius:4px;border-radius:4px;opacity:0;-ms-filter:"alpha(Opacity=0)";filter:alpha(opacity=0);-webkit-transition:background-color .2s linear,opacity .2s linear;-moz-transition:background-color .2s linear,opacity .2s linear;-o-transition:background-color .2s linear,opacity .2s linear;transition:background-color .2s linear,opacity .2s linear;right:3px;width:8px}.ps-container>.ps-scrollbar-y-rail>.ps-scrollbar-y{position:absolute;background-color:#aaa;-webkit-border-radius:4px;-moz-border-radius:4px;-ms-border-radius:4px;border-radius:4px;-webkit-transition:background-color .2s linear;-moz-transition:background-color .2s linear;-o-transition:background-color .2s linear;transition:background-color .2s linear;right:0;width:8px}.ps-container>.ps-scrollbar-y-rail.in-scrolling{background-color:#eee;opacity:.9;-ms-filter:"alpha(Opacity=90)";filter:alpha(opacity=90)}.ps-container:hover>.ps-scrollbar-x-rail,.ps-container:hover>.ps-scrollbar-y-rail{opacity:.6;-ms-filter:"alpha(Opacity=60)";filter:alpha(opacity=60)}.ps-container:hover>.ps-scrollbar-x-rail.in-scrolling,.ps-container:hover>.ps-scrollbar-y-rail.in-scrolling{background-color:#eee;opacity:.9;-ms-filter:"alpha(Opacity=90)";filter:alpha(opacity=90)}.ps-container:hover>.ps-scrollbar-x-rail:hover{background-color:#eee;opacity:.9;-ms-filter:"alpha(Opacity=90)";filter:alpha(opacity=90)}.ps-container:hover>.ps-scrollbar-x-rail:hover>.ps-scrollbar-x{background-color:#999}.ps-container:hover>.ps-scrollbar-y-rail:hover{background-color:#eee;opacity:.9;-ms-filter:"alpha(Opacity=90)";filter:alpha(opacity=90)}.ps-container:hover>.ps-scrollbar-y-rail:hover>.ps-scrollbar-y{background-color:#999}

package.json

@@ -1,19 +1,43 @@
 {
   "name": "perfect-scrollbar",
-  "version": "0.5.2",
+  "version": "0.5.8",
+  "description": "Tiny but perfect jquery scrollbar plugin.",
+  "author": "Hyunje Alex Jun <me@noraesae.net>",
+  "contributors": [
+    {
+      "name": "Hyunje Alex Jun",
+      "email": "me@noraesae.net"
+    }
+  ],
   "main": "src/perfect-scrollbar.js",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/noraesae/perfect-scrollbar"
+  },
+  "bugs": {
+    "url": "https://github.com/noraesae/perfect-scrollbar/issues"
+  },
+  "keywords": [
+    "jquery-plugin",
+    "scroll",
+    "scrollbar"
+  ],
   "engines": {
     "node": ">= 0.8.0"
   },
   "devDependencies": {
     "grunt": "~0.4.1",
+    "grunt-bump": "0.0.16",
+    "grunt-contrib-clean": "~0.4.1",
+    "grunt-contrib-csslint": "~0.1.2",
+    "grunt-contrib-cssmin": "~0.6.1",
     "grunt-contrib-jshint": "~0.1.1",
     "grunt-contrib-uglify": "~0.1.1",
-    "grunt-contrib-cssmin": "~0.6.1",
-    "grunt-contrib-csslint": "~0.1.2",
-    "grunt-contrib-clean": "~0.4.1"
+    "grunt-sass": "^0.16.1",
+    "load-grunt-tasks": "^1.0.0"
   },
   "scripts": {
     "test": "grunt travis --verbose"
-  }
+  },
+  "license": "MIT"
 }

perfect-scrollbar.jquery.json

@@ -2,7 +2,7 @@
   "name": "perfect-scrollbar",
   "title": "perfect-scrollbar",
   "description": "Tiny but perfect jquery scrollbar plugin.",
-  "version": "0.5.2",
+  "version": "0.5.8",
   "author": {
     "name": "Hyunje Alex Jun",
     "email": "me@noraesae.net",

src/perfect-scrollbar.css

@@ -1,125 +1,101 @@
-.ps-container .ps-scrollbar-x-rail {
-    position: absolute; /* please don't change 'position' */
-    bottom: 3px; /* there must be 'bottom' for ps-scrollbar-x-rail */
-    height: 8px;
-    -webkit-border-radius: 4px;
-    -moz-border-radius: 4px;
-    border-radius: 4px;
-    opacity: 0;
-    filter: alpha(opacity=0);
-    -o-transition: background-color .2s linear, opacity .2s linear;
-    -webkit-transition: background-color .2s linear, opacity .2s linear;
-    -moz-transition: background-color .2s linear, opacity .2s linear;
-    transition: background-color .2s linear, opacity .2s linear;
-}
-
-.ps-container:hover .ps-scrollbar-x-rail,
-.ps-container.hover .ps-scrollbar-x-rail {
-    opacity: 0.6;
-    filter: alpha(opacity=60);
-}
-
-.ps-container .ps-scrollbar-x-rail:hover,
-.ps-container .ps-scrollbar-x-rail.hover {
-    background-color: #eee;
-    opacity: 0.9;
-    filter: alpha(opacity=90);
-}
-
-.ps-container .ps-scrollbar-x-rail.in-scrolling {
-    background-color: #eee;
-    opacity: 0.9;
-    filter: alpha(opacity=90);
-}
-
-.ps-container .ps-scrollbar-y-rail {
-    position: absolute; /* please don't change 'position' */
-    right: 3px; /* there must be 'right' for ps-scrollbar-y-rail */
-    width: 8px;
-    -webkit-border-radius: 4px;
-    -moz-border-radius: 4px;
-    border-radius: 4px;
-    opacity: 0;
-    filter: alpha(opacity = 0);
-    -o-transition: background-color .2s linear, opacity .2s linear;
-    -webkit-transition: background-color .2s linear, opacity .2s linear;
-    -moz-transition: background-color .2s linear, opacity .2s linear;
-    transition: background-color .2s linear, opacity .2s linear;
-}
-
-.ps-container:hover .ps-scrollbar-y-rail,
-.ps-container.hover .ps-scrollbar-y-rail {
-    opacity: 0.6;
-    filter: alpha(opacity=60);
-}
-
-.ps-container .ps-scrollbar-y-rail:hover,
-.ps-container .ps-scrollbar-y-rail.hover {
-    background-color: #eee;
-    opacity: 0.9;
-    filter: alpha(opacity=90);
-}
-
-.ps-container .ps-scrollbar-y-rail.in-scrolling {
-    background-color: #eee;
-    opacity: 0.9;
-    filter: alpha(opacity=90);
-}
-
-.ps-container .ps-scrollbar-x {
-    position: absolute; /* please don't change 'position' */
-    bottom: 0; /* there must be 'bottom' for ps-scrollbar-x */
-    height: 8px;
+.ps-container.ps-active-x > .ps-scrollbar-x-rail, .ps-container.ps-active-y > .ps-scrollbar-y-rail {
+  display: block; }
+.ps-container > .ps-scrollbar-x-rail {
+  display: none;
+  position: absolute;
+  /* please don't change 'position' */
+  -webkit-border-radius: 4px;
+  -moz-border-radius: 4px;
+  -ms-border-radius: 4px;
+  border-radius: 4px;
+  opacity: 0;
+  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
+  filter: alpha(opacity=0);
+  -webkit-transition: background-color 0.2s linear, opacity 0.2s linear;
+  -moz-transition: background-color 0.2s linear, opacity 0.2s linear;
+  -o-transition: background-color 0.2s linear, opacity 0.2s linear;
+  transition: background-color 0.2s linear, opacity 0.2s linear;
+  bottom: 3px;
+  /* there must be 'bottom' for ps-scrollbar-x-rail */
+  height: 8px; }
+  .ps-container > .ps-scrollbar-x-rail > .ps-scrollbar-x {
+    position: absolute;
+    /* please don't change 'position' */
     background-color: #aaa;
     -webkit-border-radius: 4px;
     -moz-border-radius: 4px;
+    -ms-border-radius: 4px;
     border-radius: 4px;
-    -o-transition: background-color .2s linear;
-    -webkit-transition: background-color.2s linear;
-    -moz-transition: background-color .2s linear;
-    transition: background-color .2s linear;
-}
-
-.ps-container.ie6 .ps-scrollbar-x {
-    font-size: 0; /* fixed scrollbar height in xp sp3 ie6 */
-}
-
-.ps-container .ps-scrollbar-x-rail:hover .ps-scrollbar-x,
-.ps-container .ps-scrollbar-x-rail.hover .ps-scrollbar-x {
-    background-color: #999;
-}
-
-.ps-container .ps-scrollbar-y {
-    position: absolute; /* please don't change 'position' */
-    right: 0; /* there must be 'right' for ps-scrollbar-y */
-    width: 8px;
+    -webkit-transition: background-color 0.2s linear;
+    -moz-transition: background-color 0.2s linear;
+    -o-transition: background-color 0.2s linear;
+    transition: background-color 0.2s linear;
+    bottom: 0;
+    /* there must be 'bottom' for ps-scrollbar-x */
+    height: 8px; }
+  .ps-container > .ps-scrollbar-x-rail.in-scrolling {
+    background-color: #eee;
+    opacity: 0.9;
+    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=90)";
+    filter: alpha(opacity=90); }
+.ps-container > .ps-scrollbar-y-rail {
+  display: none;
+  position: absolute;
+  /* please don't change 'position' */
+  -webkit-border-radius: 4px;
+  -moz-border-radius: 4px;
+  -ms-border-radius: 4px;
+  border-radius: 4px;
+  opacity: 0;
+  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
+  filter: alpha(opacity=0);
+  -webkit-transition: background-color 0.2s linear, opacity 0.2s linear;
+  -moz-transition: background-color 0.2s linear, opacity 0.2s linear;
+  -o-transition: background-color 0.2s linear, opacity 0.2s linear;
+  transition: background-color 0.2s linear, opacity 0.2s linear;
+  right: 3px;
+  /* there must be 'right' for ps-scrollbar-y-rail */
+  width: 8px; }
+  .ps-container > .ps-scrollbar-y-rail > .ps-scrollbar-y {
+    position: absolute;
+    /* please don't change 'position' */
     background-color: #aaa;
     -webkit-border-radius: 4px;
     -moz-border-radius: 4px;
+    -ms-border-radius: 4px;
     border-radius: 4px;
-    -o-transition: background-color .2s linear;
-    -webkit-transition: background-color.2s linear;
-    -moz-transition: background-color .2s linear;
-    transition: background-color .2s linear;
-}
-
-.ps-container.ie6 .ps-scrollbar-y {
-    font-size: 0; /* fixed scrollbar height in xp sp3 ie6 */
-}
-
-.ps-container .ps-scrollbar-y-rail:hover .ps-scrollbar-y,
-.ps-container .ps-scrollbar-y-rail.hover .ps-scrollbar-y {
-    background-color: #999;
-}
-
-.ps-container.ie .ps-scrollbar-x,
-.ps-container.ie .ps-scrollbar-y {
-    visibility: hidden;
-}
-
-.ps-container.ie:hover .ps-scrollbar-x,
-.ps-container.ie:hover .ps-scrollbar-y,
-.ps-container.ie.hover .ps-scrollbar-x,
-.ps-container.ie.hover .ps-scrollbar-y {
-    visibility: visible;
-}
+    -webkit-transition: background-color 0.2s linear;
+    -moz-transition: background-color 0.2s linear;
+    -o-transition: background-color 0.2s linear;
+    transition: background-color 0.2s linear;
+    right: 0;
+    /* there must be 'right' for ps-scrollbar-y */
+    width: 8px; }
+  .ps-container > .ps-scrollbar-y-rail.in-scrolling {
+    background-color: #eee;
+    opacity: 0.9;
+    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=90)";
+    filter: alpha(opacity=90); }
+.ps-container:hover > .ps-scrollbar-x-rail, .ps-container:hover > .ps-scrollbar-y-rail {
+  opacity: 0.6;
+  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=60)";
+  filter: alpha(opacity=60); }
+  .ps-container:hover > .ps-scrollbar-x-rail.in-scrolling, .ps-container:hover > .ps-scrollbar-y-rail.in-scrolling {
+    background-color: #eee;
+    opacity: 0.9;
+    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=90)";
+    filter: alpha(opacity=90); }
+.ps-container:hover > .ps-scrollbar-x-rail:hover {
+  background-color: #eee;
+  opacity: 0.9;
+  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=90)";
+  filter: alpha(opacity=90); }
+  .ps-container:hover > .ps-scrollbar-x-rail:hover > .ps-scrollbar-x {
+    background-color: #999; }
+.ps-container:hover > .ps-scrollbar-y-rail:hover {
+  background-color: #eee;
+  opacity: 0.9;
+  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=90)";
+  filter: alpha(opacity=90); }
+  .ps-container:hover > .ps-scrollbar-y-rail:hover > .ps-scrollbar-y {
+    background-color: #999; }

src/perfect-scrollbar.scss

@@ -0,0 +1,111 @@
+// Helper mixins
+@mixin opacity($o) {
+  $IEValue: $o * 100;
+  opacity: $o;
+  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity="+$IEValue+")";
+      filter: alpha(opacity=$IEValue);
+}
+
+@mixin border-radius($r) {
+  -webkit-border-radius: $r;
+     -moz-border-radius: $r;
+      -ms-border-radius: $r;
+          border-radius: $r;
+}
+
+@mixin transition($t...) {
+  -webkit-transition: $t;
+     -moz-transition: $t;
+       -o-transition: $t;
+          transition: $t;
+}
+
+// Scrollbar mixins
+@mixin scrollbar-rail-default {
+  display: none;
+  position: absolute; /* please don't change 'position' */
+  @include border-radius(4px);
+  @include opacity(0);
+  @include transition(background-color .2s linear, opacity .2s linear);
+}
+
+@mixin scrollbar-rail-hover {
+  background-color: #eee;
+  @include opacity(0.9);
+}
+
+@mixin scrollbar-default {
+  position: absolute; /* please don't change 'position' */
+  background-color: #aaa;
+  @include border-radius(4px);
+  @include transition(background-color .2s linear);
+}
+
+@mixin scrollbar-hover {
+  background-color: #999;
+}
+
+@mixin in-scrolling {
+  &.in-scrolling {
+    @include scrollbar-rail-hover;
+  }
+}
+
+.ps-container {
+  &.ps-active-x > .ps-scrollbar-x-rail,
+  &.ps-active-y > .ps-scrollbar-y-rail {
+    display: block;
+  }
+
+  >.ps-scrollbar-x-rail {
+    @include scrollbar-rail-default;
+    bottom: 3px; /* there must be 'bottom' for ps-scrollbar-x-rail */
+    height: 8px;
+
+    >.ps-scrollbar-x {
+      @include scrollbar-default;
+      bottom: 0; /* there must be 'bottom' for ps-scrollbar-x */
+      height: 8px;
+    }
+
+    @include in-scrolling;
+  }
+
+  >.ps-scrollbar-y-rail {
+    @include scrollbar-rail-default;
+    right: 3px; /* there must be 'right' for ps-scrollbar-y-rail */
+    width: 8px;
+
+    >.ps-scrollbar-y {
+      @include scrollbar-default;
+      right: 0; /* there must be 'right' for ps-scrollbar-y */
+      width: 8px;
+    }
+
+    @include in-scrolling;
+  }
+
+  &:hover {
+    >.ps-scrollbar-x-rail,
+    >.ps-scrollbar-y-rail {
+      @include opacity(0.6);
+      @include in-scrolling;
+    }
+
+    >.ps-scrollbar-x-rail:hover {
+      @include scrollbar-rail-hover;
+
+      >.ps-scrollbar-x {
+        @include scrollbar-hover;
+      }
+    }
+
+    >.ps-scrollbar-y-rail:hover {
+      @include scrollbar-rail-hover;
+
+      >.ps-scrollbar-y {
+        @include scrollbar-hover;
+      }
+    }
+  }
+}