<div class="wrap">
<span>AAAA</span>
<span>BBBB</span>
<span>CCCC</span>
<span>DDDD</span>
</div>
.wrap > span:not(:last-child):after {
content: ", ";
}
Result
AAAA, BBBB, CCCC, DDDD
Web & Graphic Design by John Sodeyama
<div class="wrap">
<span>AAAA</span>
<span>BBBB</span>
<span>CCCC</span>
<span>DDDD</span>
</div>
.wrap > span:not(:last-child):after {
content: ", ";
}
Result
AAAA, BBBB, CCCC, DDDD