working of bootstrap loader code example
Example 1: bootstrap loader
<div class="spinner-grow" role="status">
<span class="sr-only">Loading...</span>
</div>
Example 2: bootstrap loader
<div class="spinner-border" style="width: 3rem; height: 3rem;" role="status">
<span class="sr-only">Loading...</span>
</div>
<div class="spinner-grow" style="width: 3rem; height: 3rem;" role="status">
<span class="sr-only">Loading...</span>
</div>