bootstrap visibility hidden class code example
Example 1: visibility hidden bootstrap 4
<div class="visible">...</div>
<div class="invisible">...</div>
Example 2: how to hide display in bootstrap
<!-- Bootstrap 4 -->
<div class="d-none"></div>
<!-- Bootstrap 3 -->
<!-- <div class="hidden-{screen size}"></div> -->
<div class="hidden-md"></div>