JSFiddle - React, Tailwind, and code Playground

HTML

<img src="whatever.jpg" />
<span>Copyright Stackoverflow</span>
<img src="whatever.jpg" />
<span>Copyright Stackoverflow</span>

JavaScript

$("img").each(function(innerIndex) {
 var span = $(this).next('span');
var $contents = span.text();
  span.remove();
   $(this).after('<figcaption>'+$contents+'</figcaption>')
});