where to apply bootstrap spinners code example

Example 1: bootstrap spinner

<!-- Bootstrap 5 Spinners -->
<div class="spinner-border text-primary" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-border text-secondary" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-border text-success" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-border text-danger" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-border text-warning" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-border text-info" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-border text-light" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-border text-dark" role="status">
   <span class="visually-hidden">Loading...</span>
</div>

<!-- Growing spinner -->
<div class="spinner-grow text-primary" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-grow text-secondary" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-grow text-success" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-grow text-danger" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-grow text-warning" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-grow text-info" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-grow text-light" role="status">
   <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-grow text-dark" role="status">
   <span class="visually-hidden">Loading...</span>
</div>

Example 2: bootstrap 4 spinner

<div class="spinner-border spinner-border-sm" role="status">
  <span class="sr-only">Loading...</span>
</div>
<div class="spinner-grow spinner-grow-sm" role="status">
  <span class="sr-only">Loading...</span>
</div>