display-md-1 bootstrap code example

Example 1: bootstrap display none

<!-- Bootstrap 4 -->
<div class="d-none"></div>

<!-- Bootstrap 3 -->
<!-- <div class="hidden-{screen size}"></div> -->
<div class="hidden-md"></div>

Example 2: columns center bootstrap 3

<div class="row">
    <div class="col-md-2 col-md-offset-5"></div>
</div>