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Showing content from https://github.com/pixelcog/parallax.js/tree/v2.0.0-alpha below:

GitHub - pixelcog/parallax.js at v2.0.0-alpha

Warning: This branch is still in alpha and should not be used on production servers! It should, however, be stable enough already, so please feel free to check it out and let us know if you find some issues!

please clone or download the repository and check the dist folder for the necessary files.

NPM, Yarn, Bower as well as CDN support will be added for the release version.

If not disabled, the library automatically calls itself on all elements with a data-parallax attribute with the default parameters like so:

// this is called automatically:
if(Parallax.AUTOINIT) {
  $('[data-parallax]').parallax();
}
// if you don't previously set  
Parallax.AUTOINIT = false;

####Init Basically, you can call the parallax() function on any jquery selector. The selected elements either need to have a data-src attribute or a child element which is matched by the sliderSelector query (see options).

The default values, which are used for .parallax() (and merged with an optional options parameter), look as follows:

Parallax.DEFAULTS = {
  src: null,
  speed: .2,
  bleed: 0,
  zIndex: -100,
  posX: 'center',
  posY: 'center',
  overScrollFix: false,
  excludeAgents: /(iPod|iPhone|iPad|Android)/,
  aspectRatio: null,
  // jquery selectors
  sliderSelector: '>.parallax-slider',
  mirrorSelector: 'body',
  // callback functions:
  afterRefresh: null,
  afterRender: null,
  afterSetup: null,
  afterDestroy: null,
};

These defaults can be changed easily, e.g.:

Parallax.DEFAULTS.speed = -.2;
Parallax.DEFAULTS.afterRefresh = (instance) => { doSomethingWith(instance); };

Data Attributes can be used for quick an easy setup when no complex solutions are required.

<div class="some-class" data-src="some-img.jpg" data-pos-x="left" data-parallax>

All options can be used as attributes. "Kebab-case" and the data- prefix have to be used instead of CamelCase in the JavaScript options. (e.g. aspectRatio gets data-aspect-ratio)

Important: Please note, that the <div> above will be used as the so called parallax-window and needs to have a minimum-height and transparency.

Adding the following CSS or similar will be necessary:

.some-class {
  min-height: 50vh;
  background: transparent;
}

If you don't use autoinit or need more control over the instances, you can manually initialize parallax.js and pass options via an options object

$('.any-selector-you-like-but-this-is-called-window').parallax({
  speed: .3,
  afterRender: doSomething,
});

Each instance can be destroyed by calling .parallax('destroy') on the element (window).

$('.any-selector-you-like-but-this-is-called-window').parallax('destroy');

The following options can be used:

v2.x has been redesigned from ground up to improve maintainability, compatibility and performance.

The most important changes:

• options have been simplified and reduced while increasing functionality
• variables and option names have been shortened to decrease the footprint
• changed option and attribute names:
  • imageSrc is now src
  • naturalWidth and naturalHeight have been replaced by aspectRatio which is mostly calculated automatically now
  • positionX and positionY renamed to posX and posY
  • position option has been removed, use posX and posY instead
  • iosFix and androidFix have been replaced with excludeAgents, which is now a regular expression
  • mirrorContainer has been replaced by the more flexible mirrorSelector which is a jQuery selector.
• all options can also be used as data attributes (e.g. mirrorSelector gets data-mirror-selector)
• smaller file size but higher performance, better stability and more functionality

<div class="my-parallax-window">
  <div class="my-parallax-slider">
    <img src="some-image.jpg"/>
    <p>This content and the image will move when scrolling</p>
  </div>
  <div class="some-optional-fixed-content">
    <p>This content will stay in place</p>
  </div>
</div>

$('.my-parallax-window').parallax({
  speed: -.2,
  sliderSelector: '>.my-parallax-slider',
})

Most important changes include the following:

• npm devDependencies to setup build environment
• ES6 modules are used
• Webpack is used for the build process
• tbc

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