demo[coconala=2699224]

sankikim様

by nju33

HTML

<div>
  ...前...
</div>

<script src="https://nju33coconala.firebaseapp.com/widget.js"></script>
<script id="widget">
  window.activateWidget({
    widget_url: 'da4b9237bacccdf19c0760cab7aec4a8359010b0',
    referer: location.href
  }, 'widget');
</script>

<div>
  ...後...
</div>

CSS

div {
  height: 10vh;
  width: 100%;
  background: gray;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
}