Parallax ImageScroll - jQuery plugin
JQuery and amd compatible plugin to create a parallax effect with images. Heavily inspired by the spotify.com website.
The plugin is really simple to use with some options to tweek. It makes use of css3 transform for animation where supported and falls back to top and left positioning for ancient browsers.
Check out the live demo. (No parallax effect and smaller image sizes for touch devices, see Touch section for details.)
Markup can consist of as many image elements as you want, but you should separate them with a content block, e.g. a section.
Content that "slides" on top of the images[optional content to be displayed on top of the images]
To initialize the plugin, call the imageScroll method on your image elements
The plugin is AMD compatible. To use with e.g. RequireJS, you can do this. See demo files for example.
You can configure the default options, by passing an option object to the plugin
or set the options via data attributes, data-optionname (available options: image, width (mediaWidth), height (mediaHeight), cover-ratio (coverRatio), min-height (holderMinHeight), max-height (holderMaxHeight), extra-height (extraHeight)
or set the options globally
$fnimageScrolldefaultscoverRatio = 05;//AMDImageScrolldefaultscoverRatio = 05;
image: null: The image to show (best to set this option via data attr (data-img)
imageAttribute: 'image': The data attribute name for images. Uses the value of this attribute to load the image
container: $('body')The element to which the parallax image(s) will be attached to
windowObject: $(window)The window object which listens to scroll and resize events
speed: 0.2The speed of the parallax effect. A floating number between 0 and 1, where a higher number will move the images faster upwards
coverRatio: 0.75 //75%How many percent of the screen each image should cover
holderClass: 'imageHolder'Class added to the image holder(s)
imgClass: 'img-holder-img'Class added to the image
holderMinHeight: 200The minimum height of the image in pixels
holderMaxHeight: nullThe maximum height of the image in pixels
extraHeight: 0Extra height added to the image. Can be useful if you want to show more of the top image
mediaWidth: 1600The original width of the image
mediaHeight: 900The original height of the image
parallax: trueWhether or not you want the parallax effect, e.g. does not work very well in ancient browsers
touch: falsePresents a mobile/tablet friendy version, no parallax effect and smaller images (should be used with a mobile/tablet optimized images)
You can call them on individual- or all the instances.
//Call method refresh on all the instances of the pluginvar instances = ;instances;//E.g. Call method refresh on the first image//Alternative 1:var instances = ;var instance = ;instance;//Alternative 2:var instances = ;var instance = data'plugin_imageScroll';instance;
The effect is not very smooth on a touch device. You could therefore present the user with a fallback version, which displays the images with no parallax effect. You can do so by checking for touch (e.g. with Modernizr, external lib) and set dynamic options to adjust to this.
var touch = Modernizrtouch;;
Install using bower
bower install Parallax-ImageScroll
Install using npm
npm install parallax-imagescroll
jQuery version 1.8.0 or higher
If you add content on top of the parallaxed image, make sure to apply a higher z-depth for the content (applies for browsers that support 3d transforms). Example:
Does not work very well on mobile or IE <= 9. You can then present a fallback solution by disabling parallax for ancient desktop browser (set parallax option to false) and present touch optimized images for touch devices (set touch option to true).