扩展图像网格未打开

Question

问题：我知道这可能与JS有关，我还不太了解JS，但是为什么我的扩展图像网格没有打开（扩展）？

尝试过：我了解通常情况下，在SO上，问题通常伴随着用户尝试修改情况的步骤，但是，如上所述，我对JS不够熟练，甚至无法开始知道从哪里开始。我正在尝试学习它，但是还没有。

任何帮助将不胜感激。谢谢您抽出宝贵的时间看看

这是我要复制的示例：https://tympanus.net/Tutorials/ThumbnailGridExpandingPreview/

CSS
.og-grid {
    list-style: none;
    padding: 20px 0;
    margin: 0 auto;
    text-align: center;
    width: 100%;
}

.og-grid li {
    display: inline-block;
    margin: 10px 5px 0 5px;
    vertical-align: top;
    height: 250px;
}
.og-grid li > a,
.og-grid li > a img {
    border: none;
    outline: none;
    display: block;
    position: relative;
}
.og-grid li.og-expanded > a::after {
    top: auto;
    border: solid transparent;
    content: " ";
    height: 0;
    width: 0;
    position: absolute;
    pointer-events: none;
    border-bottom-color: #ddd;
    border-width: 15px;
    left: 50%;
    margin: -20px 0 0 -15px;
}
.og-expander {
    position: absolute;
    background: #ddd;
    top: auto;
    left: 0;
    width: 100%;
    margin-top: 10px;
    text-align: left;
    height: 0;
    overflow: hidden;
}

.og-expander-inner {
    padding: 50px 30px;
    height: 100%;
}
.og-close {
    position: absolute;
    width: 40px;
    height: 40px;
    top: 20px;
    right: 20px;
    cursor: pointer;
}

.og-close::before,
.og-close::after {
    content: '';
    position: absolute;
    width: 100%;
    top: 50%;
    height: 1px;
    background: #888;
    transform: rotate(45deg);
}

.og-close::after {
    transform: rotate(-45deg);
}

.og-close:hover::before,
.og-close:hover::after {
    background: #333;
}
.og-fullimg,
.og-details {
    width: 50%;
    float: left;
    height: 100%;
    overflow: hidden;
    position: relative;
}
.og-details {
    padding: 0 40px 0 20px;
}

.og-fullimg {
    text-align: center;
}

.og-fullimg img {
    display: inline-block;
    max-height: 100%;
    max-width: 100%;
}
.og-details h3 {
    font-weight: 300;
    font-size: 52px;
    padding: 40px 0 10px;
    margin-bottom: 10px;
}

.og-details p {
    font-weight: 400;
    font-size: 16px;
    line-height: 22px;
    color: #999;
}

.og-details a {
    font-weight: 700;
    font-size: 16px;
    color: #333;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 10px 20px;
    border: 3px solid #333;
    display: inline-block;
    margin: 30px 0 0;
    outline: none;
}

.og-details a::before {
    content: '\2192';
    display: inline-block;
    margin-right: 10px;
}

.og-details a:hover {
    border-color: #999;
    color: #999;
}
.og-loading {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #ddd;
    box-shadow: 0 0 1px #ccc, 15px 30px 1px #ccc, -15px 30px 1px #ccc;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -25px 0 0 -25px;
    animation: loader 0.5s infinite ease-in-out both;
}

@keyframes loader {
    0% { background: #ddd; }
    33% { background: #ccc; box-shadow: 0 0 1px #ccc, 15px 30px 1px #ccc, -15px 30px 1px #ddd; }
    66% { background: #ccc; box-shadow: 0 0 1px #ccc, 15px 30px 1px #ddd, -15px 30px 1px #ccc; }
}
@media screen and (max-width: 830px) {

    .og-expander h3 { font-size: 32px; }
    .og-expander p { font-size: 13px; }
    .og-expander a { font-size: 12px; }

}

@media screen and (max-width: 650px) {

    .og-fullimg { display: none; }
    .og-details { float: none; width: 100%; }

}

HTML
<div class="container"> 
<div class="main">

<ul id="og-grid" class="og-grid">
                    <li>
                        <a href="http://cargocollective.com/jaimemartinez/" data-largesrc="https://i.imgur.com/qVKUdPN.png" data-title="Azuki bean" data-description="Swiss chard pumpkin bunya nuts maize plantain aubergine napa cabbage soko coriander sweet pepper water spinach winter purslane shallot tigernut lentil beetroot.">
                            <img src="https://i.imgur.com/qVKUdPN.png" width="255px" alt="img01"/>
                        </a>
                    </li>
                    <li>
                        <a href="http://cargocollective.com/jaimemartinez/" data-largesrc="https://i.imgur.com/qVKUdPN.png" data-title="Veggies sunt bona vobis" data-description="Komatsuna prairie turnip wattle seed artichoke mustard horseradish taro rutabaga ricebean carrot black-eyed pea turnip greens beetroot yarrow watercress kombu.">
                            <img src="https://i.imgur.com/qVKUdPN.png" width="255px" alt="img02"/>
                        </a>
                    </li>
                    <li>
                        <a href="http://cargocollective.com/jaimemartinez/" data-largesrc="https://i.imgur.com/qVKUdPN.png" data-title="Veggies sunt bona vobis" data-description="Komatsuna prairie turnip wattle seed artichoke mustard horseradish taro rutabaga ricebean carrot black-eyed pea turnip greens beetroot yarrow watercress kombu.">
                            <img src="https://i.imgur.com/qVKUdPN.png" width="255px" alt="img02"/>
                        </a>
                    </li>
                    <li>
                        <a href="http://cargocollective.com/jaimemartinez/" data-largesrc="https://i.imgur.com/qVKUdPN.png" data-title="Veggies sunt bona vobis" data-description="Komatsuna prairie turnip wattle seed artichoke mustard horseradish taro rutabaga ricebean carrot black-eyed pea turnip greens beetroot yarrow watercress kombu.">
                            <img src="https://i.imgur.com/qVKUdPN.png" width="255px" alt="img02"/>
                        </a>
                    </li>
                    <li>
                        <a href="http://cargocollective.com/jaimemartinez/" data-largesrc="https://i.imgur.com/qVKUdPN.png" data-title="Veggies sunt bona vobis" data-description="Komatsuna prairie turnip wattle seed artichoke mustard horseradish taro rutabaga ricebean carrot black-eyed pea turnip greens beetroot yarrow watercress kombu.">
                            <img src="https://i.imgur.com/qVKUdPN.png" width="255px" alt="img02"/>
                        </a>
                    </li>
                    <li>
                        <a href="http://cargocollective.com/jaimemartinez/" data-largesrc="https://i.imgur.com/qVKUdPN.png" data-title="Veggies sunt bona vobis" data-description="Komatsuna prairie turnip wattle seed artichoke mustard horseradish taro rutabaga ricebean carrot black-eyed pea turnip greens beetroot yarrow watercress kombu.">
                            <img src="https://i.imgur.com/qVKUdPN.png" width="255px" alt="img02"/>
                        </a>
                    </li>
<li>
                        <a href="http://cargocollective.com/jaimemartinez/" data-largesrc="https://i.imgur.com/qVKUdPN.png" data-title="Veggies sunt bona vobis" data-description="Komatsuna prairie turnip wattle seed artichoke mustard horseradish taro rutabaga ricebean carrot black-eyed pea turnip greens beetroot yarrow watercress kombu.">
                            <img src="https://i.imgur.com/qVKUdPN.png" width="255px" alt="img02"/>
                        </a>
                    </li>
<li>
                        <a href="http://cargocollective.com/jaimemartinez/" data-largesrc="https://i.imgur.com/qVKUdPN.png" data-title="Veggies sunt bona vobis" data-description="Komatsuna prairie turnip wattle seed artichoke mustard horseradish taro rutabaga ricebean carrot black-eyed pea turnip greens beetroot yarrow watercress kombu.">
                            <img src="https://i.imgur.com/qVKUdPN.png" width="255px" alt="img02"/>
                        </a>
                    </li>
                    </div>
                    </div>

JS
<script src="js/modernizr.custom.js"></script>
        <script type="text/javascript">

          var _gaq = _gaq || [];
          _gaq.push(['_setAccount', 'UA-7243260-2']);
          _gaq.push(['_trackPageview']);

          (function() {
            var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
            ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
            var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
          })();

        </script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
        <script src="js/grid.js"></script>
        <script>
            $(function() {
                Grid.init();
            });
        </script>
        <script src="//tympanus.net/codrops/adpacks/demoad.js"></script>