Spinners

<div class="spinner-border text-primary" role="status"><span class="visually-hidden">Loading...</span></div>
<div class="spinner-border text-secondary" role="status"></div>
<div class="spinner-grow text-primary" role="status"></div>
<span class="spinner-border spinner-border-sm text-primary" role="status"></span>
<button class="btn btn-primary" type="button" disabled>
  <span class="spinner-border spinner-border-sm" aria-hidden="true"></span>
  Loading...
</button>