This is one area that always confuses me with Bootstrap 4
Say you have this layout:
<div class="container-fluid">
<div class="row">
<div class="col-sm-3">col-sm-3</div>
<div class="col-sm-9">col-sm-9</div>
</div>
</div>
What classes do you to assign ( most likely to the col-sm-3 ) such that the col-sm-3 is hidden on: xs, sm and md ?
In other words and just to be clear I only want the col-sm-3 to show up on lg and xl screens?