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              <h1>Isotope - filtering with select</h1>

<select class="filters-select">
  <option value="*">show all</option>
  <option value=".metal">metal</option>
  <option value=".transition">transition</option>
  <option value=".alkali, .alkaline-earth">alkali and alkaline-earth</option>
  <option value=":not(.transition)">not transition</option>
  <option value=".metal:not(.transition)">metal but not transition</option>
  <option value="numberGreaterThan50">number > 50</option>
  <option value="ium">name ends with &ndash;ium</option>

<div class="grid">
  <div class="element-item transition metal " data-category="transition">
    <h3 class="name">Mercury</h3>
    <p class="symbol">Hg</p>
    <p class="number">80</p>
    <p class="weight">200.59</p>
  <div class="element-item metalloid " data-category="metalloid">
    <h3 class="name">Tellurium</h3>
    <p class="symbol">Te</p>
    <p class="number">52</p>
    <p class="weight">127.6</p>
  <div class="element-item post-transition metal " data-category="post-transition">
    <h3 class="name">Bismuth</h3>
    <p class="symbol">Bi</p>
    <p class="number">83</p>
    <p class="weight">208.980</p>
  <div class="element-item post-transition metal " data-category="post-transition">
    <h3 class="name">Lead</h3>
    <p class="symbol">Pb</p>
    <p class="number">82</p>
    <p class="weight">207.2</p>
  <div class="element-item transition metal " data-category="transition">
    <h3 class="name">Gold</h3>
    <p class="symbol">Au</p>
    <p class="number">79</p>
    <p class="weight">196.967</p>
  <div class="element-item alkali metal " data-category="alkali">
    <h3 class="name">Potassium</h3>
    <p class="symbol">K</p>
    <p class="number">19</p>
    <p class="weight">39.0983</p>
  <div class="element-item alkali metal " data-category="alkali">
    <h3 class="name">Sodium</h3>
    <p class="symbol">Na</p>
    <p class="number">11</p>
    <p class="weight">22.99</p>
  <div class="element-item transition metal " data-category="transition">
    <h3 class="name">Cadmium</h3>
    <p class="symbol">Cd</p>
    <p class="number">48</p>
    <p class="weight">112.411</p>
  <div class="element-item alkaline-earth metal " data-category="alkaline-earth">
    <h3 class="name">Calcium</h3>
    <p class="symbol">Ca</p>
    <p class="number">20</p>
    <p class="weight">40.078</p>
  <div class="element-item transition metal " data-category="transition">
    <h3 class="name">Rhenium</h3>
    <p class="symbol">Re</p>
    <p class="number">75</p>
    <p class="weight">186.207</p>
  <div class="element-item post-transition metal " data-category="post-transition">
    <h3 class="name">Thallium</h3>
    <p class="symbol">Tl</p>
    <p class="number">81</p>
    <p class="weight">204.383</p>
  <div class="element-item metalloid " data-category="metalloid">
    <h3 class="name">Antimony</h3>
    <p class="symbol">Sb</p>
    <p class="number">51</p>
    <p class="weight">121.76</p>
  <div class="element-item transition metal " data-category="transition">
    <h3 class="name">Cobalt</h3>
    <p class="symbol">Co</p>
    <p class="number">27</p>
    <p class="weight">58.933</p>
  <div class="element-item lanthanoid metal inner-transition " data-category="lanthanoid">
    <h3 class="name">Ytterbium</h3>
    <p class="symbol">Yb</p>
    <p class="number">70</p>
    <p class="weight">173.054</p>
  <div class="element-item noble-gas nonmetal " data-category="noble-gas">
    <h3 class="name">Argon</h3>
    <p class="symbol">Ar</p>
    <p class="number">18</p>
    <p class="weight">39.948</p>
  <div class="element-item diatomic nonmetal " data-category="diatomic">
    <h3 class="name">Nitrogen</h3>
    <p class="symbol">N</p>
    <p class="number">7</p>
    <p class="weight">14.007</p>
  <div class="element-item actinoid metal inner-transition " data-category="actinoid">
    <h3 class="name">Uranium</h3>
    <p class="symbol">U</p>
    <p class="number">92</p>
    <p class="weight">238.029</p>
  <div class="element-item actinoid metal inner-transition " data-category="actinoid">
    <h3 class="name">Plutonium</h3>
    <p class="symbol">Pu</p>
    <p class="number">94</p>
    <p class="weight">(244)</p>

              * { box-sizing: border-box; }

body {
  font-family: sans-serif;

select {
  font-size: 20px;

/* ---- isotope ---- */

.grid {
  border: 1px solid #333;

/* clear fix */
.isotope:after {
  content: '';
  display: block;
  clear: both;

/* ---- .element-item ---- */

.element-item {
  position: relative;
  float: left;
  width: 100px;
  height: 100px;
  margin: 5px;
  padding: 10px;
  background: #888;
  color: #262524;

.element-item > * {
  margin: 0;
  padding: 0;

.element-item .name {
  position: absolute;

  left: 10px;
  top: 60px;
  text-transform: none;
  letter-spacing: 0;
  font-size: 12px;
  font-weight: normal;

.element-item .symbol {
  position: absolute;
  left: 10px;
  top: 0px;
  font-size: 42px;
  font-weight: bold;
  color: white;

.element-item .number {
  position: absolute;
  right: 8px;
  top: 5px;

.element-item .weight {
  position: absolute;
  left: 10px;
  top: 76px;
  font-size: 12px;

.element-item.alkali          { background: #F00; background: hsl(   0, 100%, 50%); }
.element-item.alkaline-earth  { background: #F80; background: hsl(  36, 100%, 50%); }
.element-item.lanthanoid      { background: #FF0; background: hsl(  72, 100%, 50%); }
.element-item.actinoid        { background: #0F0; background: hsl( 108, 100%, 50%); }
.element-item.transition      { background: #0F8; background: hsl( 144, 100%, 50%); }
.element-item.post-transition { background: #0FF; background: hsl( 180, 100%, 50%); }
.element-item.metalloid       { background: #08F; background: hsl( 216, 100%, 50%); }
.element-item.diatomic        { background: #00F; background: hsl( 252, 100%, 50%); }
.element-item.halogen         { background: #F0F; background: hsl( 288, 100%, 50%); }
.element-item.noble-gas       { background: #F08; background: hsl( 324, 100%, 50%); }

// init Isotope
var $grid = $('.grid').isotope({
  itemSelector: '.element-item',
  layoutMode: 'fitRows'
// filter functions
var filterFns = {
  // show if number is greater than 50
  numberGreaterThan50: function() {
    var number = $(this).find('.number').text();
    return parseInt( number, 10 ) > 50;
  // show if name ends with -ium
  ium: function() {
    var name = $(this).find('.name').text();
    return name.match( /ium$/ );
// bind filter on select change
$('.filters-select').on( 'change', function() {
  // get filter value from option value
  var filterValue = this.value;
  // use filterFn if matches value
  filterValue = filterFns[ filterValue ] || filterValue;
  $grid.isotope({ filter: filterValue });

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