how to identify div with hidden class code example

Example: class hidden

<div class="d-none">hide on all screens</div>
<div class="d-lg-none">hide on screens wider than lg</div>
<div class="d-none d-lg-block">hide on screens smaller than lg</div>

Hidden on all      -	.d-none

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

Hidden only on sm  -	.d-sm-none .d-md-block

Hidden only on md  -	.d-md-none .d-lg-block

Hidden only on lg  -	.d-lg-none .d-xl-block

Hidden only on xl  -	.d-xl-none

Visible on all     -	.d-block

Visible only on xs -	.d-block .d-sm-none

Visible only on sm -	.d-none .d-sm-block .d-md-none

Visible only on md -	.d-none .d-md-block .d-lg-none

Visible only on lg -	.d-none .d-lg-block .d-xl-none

Visible only on xl -	.d-none .d-xl-block