JSFiddle - React, Tailwind, and code Playground

by j08691

HTML

<a rel="lightbox" href="site.com" title="a generated title"><img src="site.com/img" class="post-image" alt="a long description"/></a>

<a rel="lightbox" href="site.com" title="a generated title"><img src="site.com/img" class="post-image" alt="a longer description"/></a>

JavaScript

$('a').each(function(){
    $(this).attr('title',$(this).find('img').attr('alt'));
});