JSFiddle - React, Tailwind, and code Playground

by Curt

HTML

<div class="postbody">
<a class="lorem">test</a>
<div class="sub">
    I'm only red when a.lorem exists in postbody!
</div>
</div>

<div class="postbody">
<div class="sub">
    I'm only red when a.lorem exists in postbody!
</div>
</div>

CSS

.red
{
    color:red;
}

JavaScript

$(function(){
    $(".postbody .sub").each(function(){
       var $sub = $(this);
var $postbody = $sub.parents(".postbody");
        if ($postbody.find("a.lorem").length>0){
         $sub.addClass("red");   
        }
    });
});