Isotope - change sortData after the fact

by Reusablecode

HTML

<script src="http://isotope.metafizzy.co/jquery.isotope.min.js"></script>
<p><button id="update-sort-data">Update sort data</button></p>

<div id="sorts">
  Sort by: 
  <button data-sort-by="color">color</button>
  <button data-sort-by="number">number</button>
  <button data-sort-by="letters">letters</button>
</div>

<p><button id="shuffle">Shuffle</button></p>

<div id="container">
  <div class="item red" data-color="red"><p class="number"></p><p class="letters"></p></div>
  <div class="item blue" data-color="blue"><p class="number"></p><p class="letters"></p></div>
  <div class="item green" data-color="green"><p class="number"></p><p class="letters"></p></div>
  <div class="item yellow" data-color="yellow"><p class="number"></p><p class="letters"></p></div>
  <div class="item red" data-color="red"><p class="number"></p><p class="letters"></p></div>
  <div class="item blue" data-color="blue"><p class="number"></p><p class="letters"></p></div>
  <div class="item green" data-color="green"><p class="number"></p><p class="letters"></p></div>
  <div class="item yellow" data-color="yellow"><p class="number"></p><p class="letters"></p></div>
  <div class="item red" data-color="red"><p class="number"></p><p class="letters"></p></div>
  <div class="item blue" data-color="blue"><p class="number"></p><p class="letters"></p></div>
  <div class="item green" data-color="green"><p class="number"></p><p class="letters"></p></div>
  <div class="item yellow" data-color="yellow"><p class="number"></p><p class="letters"></p></div>
  <div class="item red" data-color="red"><p class="number"></p><p class="letters"></p></div>
  <div class="item blue" data-color="blue"><p class="number"></p><p class="letters"></p></div>
  <div class="item green" data-color="green"><p class="number"></p><p class="letters"></p></div>
  <div class="item yellow" data-color="yellow"><p class="number"></p><p class="letters"></p></div>
  <div class="item red" data-color="red"><p class="number"></p><p...

CSS

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
}

#container {
  border: 1px solid;
  padding: 3px;
}

.item {
  width: 70px;
  height: 70px;
  margin: 3px;
  float: left;
  color: white;
  font-weight: bold;
  text-shadow: 1px 1px black;
}

.item.next {
  width: 60px;
  height: 60px;
  border: 5px solid black;
  border-radius: 35px;
}

.red { background: red; }
.blue { background: blue; }
.green { background: green; }
.yellow { background: yellow; }

/* Start: Recommended Isotope styles */

/**** Isotope Filtering ****/

.isotope-item {
  z-index: 2;
}

.isotope-hidden.isotope-item {
  pointer-events: none;
  z-index: 1;
}

/**** Isotope CSS3 transitions ****/

.isotope,
.isotope .isotope-item {
  -webkit-transition-duration: 0.8s;
     -moz-transition-duration: 0.8s;
          transition-duration: 0.8s;
}

.isotope {
  -webkit-transition-property: height, width;
     -moz-transition-property: height, width;
          transition-property: height, width;
}

.isotope .isotope-item {
  -webkit-transition-property: -webkit-transform, opacity;
     -moz-transition-property:    -moz-transform, opacity;
          transition-property:         transform, opacity;
}

/**** disabling Isotope CSS3 transitions ****/

.isotope.no-transition,
.isotope.no-transition .isotope-item,
.isotope .isotope-item.no-transition {
  -webkit-transition-duration: 0s;
     -moz-transition-duration: 0s;
          transition-duration: 0s;
}

/* End: Recommended Isotope styles */

JavaScript

function randInt( max ) {
  return Math.floor( Math.random() * max );
}

function getRandomLetter() {
  return ( ( 10 + randInt( 24 ) ) / 36 ).toString(36).substring(2);
}

$( function () {

  var $container = $('#container'),
      $checkboxes = $('#filters input');

  $container.isotope({
    itemSelector: '.item'
  });

  var $items = $container.find('.item');

  $('#shuffle').click(function(){
    $container.isotope('shuffle');
  });

  $('#sorts').on( 'click', 'button', function( event ) {
    var sortByKey = $( event.target ).attr('data-sort-by');
    $container.isotope({ sortBy: sortByKey });
  });

  $('#update-sort-data').click( function () {
    // set random numbers and letters
    $items.each( function( i, item ) {
      var $item = $( item );
      var numberText = Math.floor( Math.random() * 100 );
      $item.find('.number').text( numberText );
      var lettersText = getRandomLetter() + getRandomLetter();
      $item.find('.letters').text( lettersText );
    });

    // apply getSortData
    $container.isotope( 'option', {
      getSortData: {
        'number': function( $item ) {
          return parseInt( $item.find('.number').text(), 10 );
        },
        'letters': function( $item ) {
          return $item.find('.letters').text();
        },
        'color': function( $item ) {
          return $item.attr('data-color');
        }
      }
    });
    // update sortData on all items
    $container.isotope( 'updateSortData', $items );

  });

});