<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<h1>CSS object-fit</h1>
<section id="plain">
<h1>original images</h1>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/apex.jpg" alt>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/le-helicron.jpg" alt>
</section>
<section>
<h1>Base style: <code>img { width: 200px; height: 200px; border: 1px solid; background: #eee; }</code></h1>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/apex.jpg" alt>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/le-helicron.jpg" alt>
<h2>Images squished</h2>
</section>
<section class="contain">
<h1>Base style + <code>img { object-fit: contain }</code></h1>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/apex.jpg" alt>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/le-helicron.jpg" alt>
<h2>Images letterboxed, correct aspect ratio maintained</h2>
</section>
<section class="cover">
<h1>Base style + <code>img { object-fit: cover; }</code></h1>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/apex.jpg" alt>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/le-helicron.jpg" alt>
<h2>Images expand to cover width and height, correct aspect ratio maintained</h2>
</section>
<section class="none">
<h1>Base style + <code>img { object-fit: none; }</code></h1>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/apex.jpg" alt>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/4273/le-helicron.jpg" alt>