Im a newbie and I can't get my image to display when using holder.js and bootstrap cards. I ran across holder.js as the first solution to creating bootstrap cards so that's what I'm trying to use. If there is a better solution I'm all ears.
<div class="card">
<img class="card-img-top" data-src="http://seeklogo.com/images/P/Polaris-logo-F1A7D948C6-seeklogo.com.gif" alt="Card image cap">
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Button</a>
</div>
</div>
Here is my header where I've called in holder.js
<head>
<title>James Scaggs Portfolio - JamesScaggs.com</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/css/bootstrap.min.css" integrity="sha384-y3tfxAZXuh4HwSYylfB+J125MxIs6mR5FOHamPBG064zB+AFeWH94NdvaCBm8qnd" crossorigin="anonymous">
<script src="js/holder-master/holder.js"></script>
What am I missing here?