cargador de bootstrap
<div class="spinner-border" role="status">
<span class="sr-only">Loading...</span>
</div>
Sore Shark
<div class="spinner-border" role="status">
<span class="sr-only">Loading...</span>
</div><div class="spinner-grow text-primary" role="status">
<span class="sr-only">Loading...</span>
</div>
<div class="spinner-grow text-secondary" role="status">
<span class="sr-only">Loading...</span>
</div>
<div class="spinner-grow text-success" role="status">
<span class="sr-only">Loading...</span>
</div>
<div class="spinner-grow text-danger" role="status">
<span class="sr-only">Loading...</span>
</div>
<div class="spinner-grow text-warning" role="status">
<span class="sr-only">Loading...</span>
</div>
<div class="spinner-grow text-info" role="status">
<span class="sr-only">Loading...</span>
</div>
<div class="spinner-grow text-light" role="status">
<span class="sr-only">Loading...</span>
</div>
<div class="spinner-grow text-dark" role="status">
<span class="sr-only">Loading...</span>
</div><div class="text-center">
<div class="spinner-border" role="status">
<span class="sr-only">Loading...</span>
</div>
</div><div class="d-flex align-items-center">
<strong>Loading...</strong>
<div class="spinner-border ml-auto" role="status" aria-hidden="true"></div>
</div><button class="btn btn-primary" type="button" disabled>
<span class="spinner-grow spinner-grow-sm" role="status" aria-hidden="true"></span>
<span class="sr-only">Loading...</span>
</button>
<button class="btn btn-primary" type="button" disabled>
<span class="spinner-grow spinner-grow-sm" role="status" aria-hidden="true"></span>
Loading...
</button>σ AGE=20 (STUDENT)