Flooper

Uses flex order attribute to loop a list of items instead of duplication or expensive multiItem position calculations. See it in action at project page

Usage & Options

Install

Old school include (exposes flooper global):

<script src="https://unpkg.com/flooper"></script>

Savage developers:

npm install --save flooper

Then import it:

import 'flooper' from 'flooper'; // or...
const flooper = require('flooper');

HTML & CSS

Don't be a bad boy and put js-hooks classes in your CSS files please. This is the required and minimal HTML and CSS for the plugin to work.

Note: your classNames and jsHooks can be different

<!-- required hooks -->
<div class="c-my-flooper js-flooper">
  ...
  <div class="c-my-flooper__el js-flooper-item"></div>
  ...
</div>

//[1] required
.c-my-flooper{
  position: relative; // [1] anything but static
  display: flex; // [1]
  flex-wrap: nowrap; // [1]
  white-space: nowrap; // [1]
}

.c-my-flooper__el{
  //go wild;
}

Javascript

/**
 * @function flooper
 *
 * @param {String|HTMLElement} flooperElement - flooper container, defaults to '.js-flooper'
 * @param {Object} [options] - containing the props described here at #options-and-defaults
 */

let myFlooper = new flooper('.js-flooper'); // you can ommit paramenter if used 'js-flooper' in HTML 
myFlooper.init();
// enjoy

Options and defaults

/**
 * @param {Object} options
 *
 * @param {bool}   [options.autoPlay=true] - flooper starts playing at initialisation
 * @param {string} [options.flooperItemSelector = '.js-flooper-item'] - Flooper children loopable items
 * @param {number} [options.bufferSize = 10] - amount of pixels after block as past left side
 * @param {number} [options.speed = 1] - amount of pixels container element should move per call.
 * @param {String} [options.name] = 'flooperInstance' - Prefix to build unique id
 *
 * @callback onFloop - When an element of a flooper is looped
 * @param {HTMLElment} flooperItem 
 * @param {Number} CurrentIndex 
 *
 * @callback onStart - described next section
 * @callback onPause - described next section
 * @callback onPlay - described next section
 * @callback onSlowmotion - described next section
 */

// defaults
let instance = new Flooper('.js-flooper', {
  autoPlay: true, // 
  flooperItemSelector: '.js-flooper-item', // string class selector
  bufferSize: 10,
  name: `flooperInstance`, 
  speed: 1,
  onFloop: () => {}, //noop
  onStart: () => {}, //noop
  onPlay: () => {}, //noop
  onPause: () => {}, //noop
  onSlowmotion: () => {}, //noop
});

Usage via data-attributes

You can specifiy options via data-flooper-options attribute and using valid JSON notation

<!-- back ticks used to allow \n in preprocessors -->
<div class="c-my-flooper js-flooper-with-data-options"  data-flooper-options=`{
    "autoplay": false,
    "speed": 2,
  }`>
  ...
  <div class="c-my-flooper__el js-flooper-item"></div>
  ...
</div>

const myFlooper = new flooper('js-flooper-with-data-options');
myFlooper.init(); 
// this flooper will have speed: 2 and will not autoPlay

Methods & Callbacks

After instanciate and init, these are the current methods available.

// define
const myFlooper = new flooper();
myFlooper.init();

Method	Description
myFlooper.pause()	Pauses the flooper looping animation
myFlooper.play()	Resumes animation if paused
myFlooper.slowMotion()	Toggles slowmo mode. Reduces speed to half. Currently default behaviour on mouseHover, but soon to be optional
myFlooper.setCallbacks(obj)	Used this to pass an object with desired callbacks after instanciation. Ex: myFlooper.setCallbacks({onFloop: function(el, i){console.log(el)}})

callback	Description
myFlooper.onFloop(el, order)	Each time an element order is changed, returns flooped el and its current order
myFlooper.onStart()	when initialised
myFlooper.onPlay()	Self describing
myFlooper.onPause()	Self describing
myFlooper.onSlowmotion()	Self describing

Multiple floopers on the same page

<!-- 1-->
<div data-flooper data-flooper-options=`{
  "flooperItemSelector": "[data-flooper-item]", 
  "name": "first"
}`>
  <div data-flooper-item>1</div>
  ...
</div>


<!-- 2 -->
<div data-flooper data-flooper-options=`{
  "flooperItemSelector": "[data-flooper-item]", 
  "name": "second"
}`>
  <div data-flooper-item>1</div>
  ...
</div>

<!-- 3 -->
<div data-flooper data-flooper-options=`{
  "flooperItemSelector": "[data-flooper-item]", 
  "name": "third"
}`>
  <div data-flooper-item>1</div>
  ...
</div>

(function(){
  var $floopers = document.querySelectorAll('[data-flooper]');

  $floopers.forEach(function(floop, i){
    flooperInstances[i] = new flooper(floop);
  });
})();

If you need access to a specific istance

(function initAllThaFloopers(){
  // save a global reference
  window.flooperInstances = [];
  var $floopers = document.querySelectorAll('[data-flooper]');

  $floopers.forEach(function(floop, i){
    flooperInstances[i] = new flooper(floop);
  });
})();  

...
// later that day somewhere else
var secondFlooper = flooperInstances.find(inst => inst.uid.startsWith('second') === true); // or...
var secondFlooper = flooperInstances.find(inst => inst.options.name('second') === true);

secondFlooper.pause();

Developing

• Clone the repo
• npm install
• npm start or gulp

Production env

To start a production like environment pass --env production flag.
Ex:npm start --env production

Deploy site to gh-pages

• npm run deploy:site This will build a production ready optimized site and deploy it to gh-pages branch.

Contributing

See our guidelines

Authors & Credits

Tomás Marques [e-mail] (http://tomasmcm.design/)
Renato de Leão [e-mail] (http://renatodeleao.com/)

Original Concept

• Codepen by @tomasmcm

Demo Images source:

• https://www.pexels.com/photo/abbey-beatles-cc0-crossing-395714/
• https://www.flickr.com/photos/oddsock/167157641

Demo Animations powered by the awesome libs

• Anime.js by Julian Garnier
• Scrollama by Russell Goldenberg

License

The MIT License