HC-Sticky

JavaScript library that makes any element on your page visible while you scroll. Dependency free, but lso works as a jQuery plugin. Check out the demos.

Quick start

Install

This package can be installed with:

• npm: npm install --save hc-sticky

Or download the latest release.

Including HC-Sticky

Script tag

<script src="/path/to/hc-sticky.js"></script>

Webpack/Browserify

In the script, including HC-Sticky will usually look like this:

const hcSticky = require('hc-sticky');

Babel

import hcSticky from 'hc-sticky';

AMD (Asynchronous Module Definition)

If using AMD, the module will be automatically defined as hcSticky.

Usage

Be sure to call HC-Sticky once your element is available in the DOM.

Vanilla JS

document.addEventListener('DOMContentLoaded', function() {

  var Sticky = new hcSticky('#element', {
    stickTo: '#content'
  });

});

jQuery

jQuery(document).ready(function($) {

  $('#element').hcSticky({
    stickTo: $('#content')
  });

});

For HC-Sticky to work as a jQuery plugin, jQuery has to be a property of global window object, so be careful when using it in compbination with Babel/Webpack/Browserify and jQuery.

Options

HC Sticky has a wide range of options you can set to have a full controll over the sticky elements.

Property	Default	Type	Description
top	0	int	The distance from the top of the Window at which to trigger HC-Sticky.
bottom	0	int	The distance from the bottom of the Window at which to attach HC-Sticky.
innerTop	0	int	The distance from the top inside of the sticky element at which to trigger HC-Sticky.
innerSticker	null	string / element object	Element inside of the sticky element at which to attach HC-Sticky. This has higher priority than innerTop option.
bottomEnd	0	int	The distance from the bottom of the referring element at which to stop HC-Sticky.
stickTo	null (parent element)	string / element object	Element that represents the reference for height instead of height of the container.
followScroll	true	boolean	When set to false, sticky content will not move with the page if it is bigger than Window.
stickyClass	'sticky'	string	HTML class that will be applied to sticky element while it is attached.
responsive	null	object	Object containing responsive breakpoints, on which you can tell HC Sticky what to do.
mobileFirst	false	boolean	Direction of the responsive queries.
disable	false	boolean	Disable the plugin. Usualy used with responsive object.
onStart	null	function	Callback function fired when the element becomes attached.
onStop	null	function	Callback function fired when the element stops floating.
onBeforeResize	null	function	Callback function fired before sticky has been resized (happens after Window resize and before sticky reinit).
onResize	null	function	Callback function fired after sticky has been resized (happens after Window resize and sticky reinit).
resizeDebounce	100	int	Limit the rate at which the HC Sticky can fire on window resize.

More on how to use the responsive object here.

Methods

Methods are used to control the plugin after initialization.

Method	Accepts	Description
options	string	Returns current settings, or a specific setting if you specify it.
update	object	Updates the settings with the new ones.
refresh	N/A	Recalculates sticky size and position. Useful after altering DOM elements inside sticky.
detach	N/A	Detaches the HC-Sticky from element, preventing it from running.
attach	N/A	Attaches the HC-Sticky back to the element.
destroy	N/A	Completely destroys HC-Sticky and reverts element to original state.

Vanilla JS

var Sticky = new hcSticky('#element', {
  stickTo: '#content'
});

Sticky.update({
  top: 20
});

jQuery

var $sticky = $('#element');

$sticky.hcSticky({
  stickTo: '#content'
});

$sticky.hcSticky('update', {
  top: 20
});

Dev Building

This package comes with Gulp. The following tasks are available:

• default compiles the JS into /dist and builds the Demos into /docs.
• watch watches source JS and Demo files and builds them automatically whenever you save.

You can pass a --dev command if you don't want the compiled JS to be minified.

License

The code and the documentation are released under the MIT License.