abtmtr-v4/embeds/loader.html

<!-- Put this template in all pages that require JavaScript! -->
<div
  style="
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background-color: var(--background-color);
    color: var(--color);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 1000;
    font-family: sans-serif;
  "
  id="loading"
>
  <div>
    <h1>Loading...</h1>
    <p>Please wait.</p>
    <p>If this page does not load, try enabling JavaScript.</p>
    <small>(This site won't work well without it.)</small>
    <p>Or <a href="/">go back home</a>.</p>
    <script>
      window.addEventListener("DOMContentLoaded", function () {
        document.querySelector("#loading").style.display = "none";
      });
    </script>
  </div>
</div>