<link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/fancybox/3.3.4/jquery.fancybox.css"> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/fancybox/3.3.4/jquery.fancybox.js"></script> https://codepen.io/azemoh/pen/OPBPoE <div class="container"> <h2>fancyBox v3.3 - Using trigger element</h2> <p class="imglist"> <a data-trigger="preview" href="javascript:;"> <img src="https://source.unsplash.com/LuK-MuZ-yf0/510x340" /> </a> </p> <div style="display:none;"> <a href="https://source.unsplash.com/LuK-MuZ-yf0/1500x1000" data-fancybox="preview"></a> <a href="https://source.unsplash.com/Oaqk7qqNh_c/1500x1000" data-fancybox="preview"></a> <a href="https://source.unsplash.com/X9GHkHbJIaU/1500x1000" data-fancybox="preview"></a> <a href="https://source.unsplash.com/9c_djeQTDyY/1500x1000" data-fancybox="preview"></a> </div> </div>