A lightweight jQuery custom scrollbar plugin, that triggers event when reached the defined point.

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2.4.0 2016-06-06 21:36 UTC


Build Status

A lightweight jQuery custom scrollbar plugin, that triggers event when reached the defined point.

Demo Page

Browser compatibility

  • IE 7+
  • Firefox
  • Opera (old and new)
  • Safari
  • Chrome
  • Chrome for Android

... and others

Scrollbox is automatically tested on the following browsers

Sauce Test Status


Several quick start options are available:

  • Download the latest release.
  • Clone the repo: git clone
  • Install with Bower: bower install scrollbox.
  • Install with npm: npm install scrollbox.
  • Install with Composer: composer require invis1ble/scrollbox.

After installing the plugin you have to install jquery-mousewheel. You can simply download it as archive and unpack to desired location.


In order to use the plugin, you have to add link tag to your html

<link href="/path/to/scrollbox.min.css" media="screen" rel="stylesheet" type="text/css">

and include the scripts e.g.

<script src="//"></script>
<script src="/path/to/jquery.mousewheel.min.js" type="text/javascript"></script>
<script src="/path/to/scrollbox.min.js" type="text/javascript"></script>

Let's assume that you want to stylize the following element:

<div id="long-content-container">
    Here is a long content

Then you need to define max-height of that element:

#long-content-container {
    max-height: 200px;

and initialize Scrollbox:


That's all. Now if real height of the container is more than the defined max-height then the plugin will add scrollbar to it.

You can stylize scrollbar via css or even better by overwriting corresponding less variables. See src/less/ for more details.

Basic features

Scrollbox uses several options to configuring behavior. The default options are:

    distanceToReach: 0,
    wheelSensitivity: 20,
    momentum: {
        acceleration: 1600,
        thresholdTime: 500
    start: 'top',
    templates: {
        bar: '<div class="scrollbox-bar"></div>',
        rail: '<div class="scrollbox-rail"></div>',
        wrapper: '<div class="scrollbox-wrapper"></div>'

You can optionally pass an object containing all of the options that you would like to initialize Scrollbox with e.g.

    wheelSensitivity: 25,
    start: 'bottom'

or re-define default values for all instances

$.fn.scrollbox.defaults.wheelSensitivity = 25;
  • distanceToReach When scrolling position reaches top or bottom, the plugin triggers event reach.scrollbox on element. Event object passed to handler contains position property that may be top or bottom. This feature is useful when you want implement so-called "infinite scrolling". distanceToReach is the distance in pixels before very top or very bottom when that events will be emitted.
  • wheelSensitivity is the distance in pixels for one fixed step of mouse wheel. You probably shouldn't change this value.
  • momentum.acceleration Swipe acceleration factor. Used for touchscreens.
  • momentum.thresholdTime Threshold time in milliseconds for detect inertial moving at swipe. Used for touchscreens.
  • start Start position of scroll. The value can be top, bottom or number of pixels from the top.
  • templates Normally you don't need to change this templates, but you can if you want.

Scrollbox also triggers a several events during lifecycle:

  • reach.scrollbox already has been explained above.
  • init.scrollbox fires when instance initializes.
  • scroll.scrollbox - on scroll position changes.

You can also call some methods of the plugin.

For example, if you write infinite scroll implementation you have to update scrollbar position and height after content has been added. To do this you should simply call update method

  • update() already has been explained above.
  • scroll(delta, animationOptions)) scroll by pixels. $('#long-content-container').scrollbox('scroll', 100) as example. See .animate() for the available values of the animationOptions
  • jump(y, animationOptions) scroll to position.
  • destroy() Call this method when you want to completely destroy instance of Scrollbox.