JSFiddle - React, Tailwind, and code Playground
HTML
<div class="preview">
<div class="panel">
<div class="dmPageHeadline">Something 1</div>
</div>
<div class="panel">
<div class="dmPageHeadline">Something 2</div>
</div>
<div class="panel">
<div class="dmPageHeadline">Something 3</div>
</div>
<div class="panel">
<div class="dmPageHeadline">Something 4</div>
</div>
</div>
JavaScript
$(".preview .panel .dmPageHeadline").prepend(" 1 - ");