vertical center align div bootstrap 4 code example

Example 1: bootstrap div vertical center

<div class="jumbotron d-flex align-items-center min-vh-100">
  <div class="container text-center">
    I am centered vertically
  </div>
</div>

Example 2: vertical align bootstrap

<div class="row h-100">   <div class="col-sm-12 my-auto">     <div class="card card-block w-25">Card</div>   </div></div>