<h1 class="container mt-4">Placeholders</h1>

<div class="container">
  <h1 class="placeholder placeholder-lg col-6"></h1>
  <div class="placeholder col-6"></div>
  <div class="placeholder bg-danger col-8"></div>
  <div class="placeholder-glow">
    <div class="placeholder col-10"></div>
  </div>
  <div class="placeholder placeholder-xs col-7"></div>
  <a href="#" class="placeholder placeholder-wave d-block mt-3 btn btn-primary disabled col-4" aria-hidden="true"></a>
</div>