Sticking an Element when Scrolling

IMPORTANT: It's recommended to use the new CSS position: sticky property: https://developers.google.com/web/updates/2012/08/Stick-your-landings-position-sticky-lands-in-WebKit

This is a jQuery plugin to make an element scroll with the page inside the boundaries of a specified container.

There are many plugins like this, but this one was built to be simple and lightweight, with no frills nor extra features.

Usage

• Download from GitHub, or npm install jquery-sticky-element if you're using NPM
• Include jQuery & Sticky Element
• Invoke Sticky Element on the desired DOM element(s)

<script type="text/javascript" src="https://code.jquery.com/jquery-latest.min.js"></script>
<script type="text/javascript" src="jquery.stickyelement.min.js"></script>
<script type="text/javascript">
    $(document).ready(function(){
        // Without options
        $('scrolling_item_selector').sticky('scrolling_container_selector');
        
        // With options
        $('scrolling_item_selector').sticky('scrolling_container_selector', {
            useTransition: false,
            animate: true,
            animTime: 1000
        });
    });
</script>

You can pass in a class or ID into either one. Note that the container will get set to position relative.

Options

Name	Default	Description
useTransition	true	Use native CSS3 transition property (recommended)
animate	true	Use jQuery animate function
animTime	200	Time it takes for animation to complete in ms
animDelay	300	Delay until the animation starts in ms, used only if animate is true
offset	0	Offset the sticky element, useful if you have a fixed header that scrolls with the page

Note: If you set useTransition to true, animate will always be treated as false

Methods

You can call various methods on a sticky element instance

Name	Description
update	Updates the position and boundaries of the element
toggleFreeze	Toggles whether the element will move based off the scroll position
setBoundaries	Updates the top and bottom boundaries of the element
moveIt	Manually move the element to the scroll position within its parent boundaries (useful if the element is frozen)
setOffset	Update the offset of the sticky element

Example usage:

// This will update the sticky element's offset
$('#sticky').sticky('setOffset', 50);

Events

Name	Description
sticky-created	Fired when the sticky element is created and ready to move
sticky-update	Fired when the element's update method is called to update boundaries
sticky-hit-top	Fired when the element reaches the top of it's container
sticky-hit-bottom	Fired when the element reaches the bottom of it's container
sticky-frozen	Fired when the element is frozen
sticky-unfrozen	Fired when the element is unfrozen

Example usage:

$('#sticky').on('sticky-created', function(event){
  console.log('Sticky element created', event.target);
});

License

Copyright (c) 2010-2016

The MIT License

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:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.