display sm none

1Hidden on all	.d-none
2Hidden only on xs	.d-none .d-sm-block
3Hidden only on sm	.d-sm-none .d-md-block
4Hidden only on md	.d-md-none .d-lg-block
5Hidden only on lg	.d-lg-none .d-xl-block
6Hidden only on xl	.d-xl-none
7Visible on all	.d-block
8Visible only on xs	.d-block .d-sm-none
9Visible only on sm	.d-none .d-sm-block .d-md-none
10Visible only on md	.d-none .d-md-block .d-lg-none
11Visible only on lg	.d-none .d-lg-block .d-xl-none
12Visible only on xl	.d-none .d-xl-block

1<!-- Bootstrap 4 -->
2<div class="d-none"></div>
3
4<!-- Bootstrap 3 -->
5<!-- <div class="hidden-{screen size}"></div> -->
6<div class="hidden-md"></div>

1.d-none
2Hidden only on xs	.d-none .d-sm-block

1<div class="d-none"></div> for bootstrap 4