flickity-transformer

An interface for declaring granular transform effects for Flickity.

• Installation
• Usage

- Transforms - Default units

• Examples
• Contributing

Installation

Via NPM:

yarn add flickity-transformer
# or
npm i --save flickity-transformer

Via download:

• Minified: flickity-transformer.pkgd.min.js
• Un-minified: flickity-transformer.pkgd.js

CDN:

<!-- Minified -->
<script src="https://unpkg.com/flickity-transformer/dist/flickity-transformer.pkgd.min.js"></script>

<!-- Un-minified -->
<script src="https://unpkg.com/flickity-transformer/dist/flickity-transformer.pkgd.js"></script>

Usage

Create a new FlickityTransformer, passing in your Flickity instance and an array of transform objects. Transforms will be applied to each Flickity cell in the order they are declared.

var Flickity = require('flickity')
var FlickityTransformer = require('flickity-transformer')

var flkty = new Flickity('.carousel', {
  // options
})

var transformer = new FlickityTransformer(flkty, [
  {
    name: 'scale', // Let's scale your cells...
    stops: [
      [-300, 0.5], // at -300px, slides will be scaled to 0.5
      [0, 1], // at the home position, slides will be full size
      [300, 0.5] // at 300px, slides will be half size again
    ]
  },
  {
    name: 'rotate', // and add a little rotation...
    unit: 'rad' // use a unit other than the default
    stops: [
      [-300, -1], // rotate slides to the left by 1 radian
      [0, 0], // they'll be straight at center
      [300, 1] // and rotated to the right
      // Add as many stops as you need
    ]
  }
])

Transforms

Each object in the transforms array requires at least two properties: name and stops. Each stop in stops is an array with two values: x position in pixels relative to the home position of your carousel, and the transform value to apply at that position.
| property | type | value | | ------------- | --------- | ----------------- | | name | String | (required) The transform function name | stops | Array | (required) An array of at least two transform stops. | | unit | String | (optional) Override the default unit. |

// Example: rotate cells between -1rad at -300px, and 1rad at 300px:
{
  name: 'rotate',
  unit: 'rad',
  stops: [
    [-300, -1],
    [300, 1]
  ]
}

Default units

const units = {
  perspective: 'px',
  rotate: 'deg',
  rotateX: 'deg',
  rotateY: 'deg',
  rotateZ: 'deg',
  skew: 'deg',
  skewX: 'deg',
  skewY: 'deg',
  translateX: 'px',
  translateY: 'px',
  translateZ: 'px'
}

Examples

• Basic CodePen demo
• Simple cover-flow example

Contributing

Contributions are welcome. Top priorities are to support wrapAround: true and units other than pixels for stop positions. See issues for details. To get up and running:

# Install dependencies
$ npm install

# Lint, test & build
$ npm run build

# Run functional test in the browser
$ npm run functional

# See various scripts in package.json

Uses JavaScript Standard Style.