JSFiddle - React, Tailwind, and code Playground
HTML
<div id="tags" style="border:none">
<span class="tag">foo bar</span>
<span class="tag"></span>
<span class="tag">fg</span>
</div>
JavaScript
$(".tag:empty").text("EMPTY");
<div id="tags" style="border:none">
<span class="tag">foo bar</span>
<span class="tag"></span>
<span class="tag">fg</span>
</div>
$(".tag:empty").text("EMPTY");