10.
Show by screen size
<strong class="show-for-small-only">This text is
shown only on a small screen.</strong>
<strong class="show-for-large-only">This text is
shown only on a large screen.</strong>
11.
Hide by screen size
<strong class="hide-for-small-only">You are not on a
small screen.</strong>
<strong class="hide-for-large-only">You are not on a
large screen.</strong>