Extract these files :
bin/iframe-resizer.min.js
bin/iframe-resizer-container.min.js
<script src="iframe-resizer.min.js"></script>
<script src="iframe-resizer-container.min.js"></script>
<script>
var iframeResizer = new IframeResizer("http://example.com");
</script>
http://example.com
being the domain of the iframe content (authorized origin)