Isotope Javascript

<style>
    * {
        box-sizing: border-box;
    }

    body {
        font-family: sans-serif;
    }

    /* ---- button ---- */
    .button {
        display: inline-block;
        padding: 10px 18px;
        margin-bottom: 10px;
        background: #EEE;
        border: none;
        border-radius: 7px;
        background-image: linear-gradient(to bottom, hsla(0, 0%, 0%, 0), hsla(0, 0%, 0%, 0.2));
        color: #222;
        font-family: sans-serif;
        font-size: 16px;
        text-shadow: 0 1px white;
        cursor: pointer;
    }

    .button:hover {
        background-color: #8CF;
        text-shadow: 0 1px hsla(0, 0%, 100%, 0.5);
        color: #222;
    }

    .button:active,
    .button.is-checked {
        background-color: #28F;
    }

    .button.is-checked {
        color: white;
        text-shadow: 0 -1px hsla(0, 0%, 0%, 0.8);
    }

    .button:active {
        box-shadow: inset 0 1px 10px hsla(0, 0%, 0%, 0.8);
    }

    /* ---- button-group ---- */
    .button-group:after {
        content: '';
        display: block;
        clear: both;
    }

    .button-group .button {
        float: left;
        border-radius: 0;
        margin-left: 0;
        margin-right: 1px;
    }

    .button-group .button:first-child {
        border-radius: 0.5em 0 0 0.5em;
    }

    .button-group .button:last-child {
        border-radius: 0 0.5em 0.5em 0;
    }

    /* ---- isotope ---- */
    .isotope-grid {
        border: 1px solid #333;
    }

    /* clear fix */
    .isotope-grid: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.iso-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%);
    }
</style>

<h1>Isotope - filtering</h1>

<div class="button-group filters-button-group">
    <button class="button is-checked" data-filter="*">show all</button>
    <button class="button" data-filter=".metal">metal</button>
    <button class="button" data-filter=".iso-transition">transition</button>
    <button class="button" data-filter=".alkali, .alkaline-earth">alkali and alkaline-earth</button>
    <button class="button" data-filter=":not(.iso-transition)">not transition</button>
    <button class="button" data-filter=".metal:not(.transition)">metal but not transition</button>
    <button class="button" data-filter="numberGreaterThan50">number > 50</button>
    <button class="button" data-filter="ium">name ends with &ndash;ium</button>
</div>

<div class="isotope-grid">
    <div class="element-item iso-transition metal " data-category="iso-transition">
        <h3 class="name">Mercury</h3>
        <p class="symbol">Hg</p>
        <p class="number">80</p>
        <p class="weight">200.59</p>
    </div>
    <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>
    <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>
    <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>
    <div class="element-item iso-transition metal " data-category="iso-transition">
        <h3 class="name">Gold</h3>
        <p class="symbol">Au</p>
        <p class="number">79</p>
        <p class="weight">196.967</p>
    </div>
    <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>
    <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>
    <div class="element-item iso-transition metal " data-category="iso-transition">
        <h3 class="name">Cadmium</h3>
        <p class="symbol">Cd</p>
        <p class="number">48</p>
        <p class="weight">112.411</p>
    </div>
    <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>
    <div class="element-item iso-transition metal " data-category="iso-transition">
        <h3 class="name">Rhenium</h3>
        <p class="symbol">Re</p>
        <p class="number">75</p>
        <p class="weight">186.207</p>
    </div>
    <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>
    <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>
    <div class="element-item iso-transition metal " data-category="iso-transition">
        <h3 class="name">Cobalt</h3>
        <p class="symbol">Co</p>
        <p class="number">27</p>
        <p class="weight">58.933</p>
    </div>
    <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>
    <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>
    <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>
    <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>
    <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>
    </div>
</div>

<script src="https://unpkg.com/isotope-layout@3/dist/isotope.pkgd.min.js"></script>

<script>
    // external js: isotope.pkgd.js
    // external js: isotope.pkgd.js
    // init Isotope
    var iso = new Isotope('.isotope-grid', {
        itemSelector: '.element-item',
        layoutMode: 'fitRows'
    });
    // filter functions
    var filterFns = {
        // show if number is greater than 50
        numberGreaterThan50: function(itemElem) {
            var number = itemElem.querySelector('.number').textContent;
            return parseInt(number, 10) > 50;
        },
        // show if name ends with -ium
        ium: function(itemElem) {
            var name = itemElem.querySelector('.name').textContent;
            return name.match(/ium$/);
        }
    };
    // bind filter button click
    var filtersElem = document.querySelector('.filters-button-group');
    filtersElem.addEventListener('click', function(event) {
        // only work with buttons
        if (!matchesSelector(event.target, 'button')) {
            return;
        }
        var filterValue = event.target.getAttribute('data-filter');
        // use matching filter function
        filterValue = filterFns[filterValue] || filterValue;
        iso.arrange({
            filter: filterValue
        });
    });
    // change is-checked class on buttons
    var buttonGroups = document.querySelectorAll('.button-group');
    for (var i = 0, len = buttonGroups.length; i < len; i++) {
        var buttonGroup = buttonGroups[i];
        radioButtonGroup(buttonGroup);
    }

    function radioButtonGroup(buttonGroup) {
        buttonGroup.addEventListener('click', function(event) {
            // only work with buttons
            if (!matchesSelector(event.target, 'button')) {
                return;
            }
            buttonGroup.querySelector('.is-checked').classList.remove('is-checked');
            event.target.classList.add('is-checked');
        });
    }
</script>