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.
 
@@ -197,10 +205,12 @@ 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
 -------
 
-The MIT License (MIT) Copyright (c) 2012, 2014 Hyeonje Alex Jun and other contributors.
+The MIT License (MIT) Copyright (c) 2012, 2014 Hyunje Alex Jun and other contributors.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

bower.json

@@ -1,9 +1,9 @@
 {
   "name": "perfect-scrollbar",
-  "version": "0.4.11",
+  "version": "0.5.8",
   "homepage": "http://noraesae.github.io/perfect-scrollbar/",
   "authors": [
-    "Hyeonje Alex Jun <me@noraesae.net>"
+    "Hyunje Alex Jun <me@noraesae.net>"
   ],
   "description": "Tiny but perfect jQuery scrollbar plugin",
   "main": [

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 - v0.5.1
+/*! perfect-scrollbar - v0.5.8
 * http://noraesae.github.com/perfect-scrollbar/
-* Copyright (c) 2014 Hyeonje Alex Jun; Licensed MIT */
+* 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": "0.5.1",
+  "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

@@ -2,9 +2,9 @@
   "name": "perfect-scrollbar",
   "title": "perfect-scrollbar",
   "description": "Tiny but perfect jquery scrollbar plugin.",
-  "version": "0.5.1",
+  "version": "0.5.8",
   "author": {
-    "name": "Hyeonje Alex Jun",
+    "name": "Hyunje Alex Jun",
     "email": "me@noraesae.net",
     "url": "https://github.com/noraesae/"
   },
@@ -29,7 +29,7 @@
   "bugs": "https://github.com/noraesae/perfect-scrollbar/issues/",
   "maintainers": [
     {
-      "name": "Hyeonje Alex Jun",
+      "name": "Hyunje Alex Jun",
       "email": "me@noraesae.net",
       "url": "https://github.com/noraesae/"
     }

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;
+      }
+    }
+  }
+}