JSFiddle - React, Tailwind, and code Playground

HTML

<div id="acc">
    <h1>Main Title Should Not Get Class Acc Header</h1>
    <h2>Hey! How are You Doing?</h2>
    <h2>I Love New York</h2>
    <p>simple paragraph text here...</p>
</div>

CSS

h1,h2,p{padding:3px; margin:3px;}
h1{border:1px solid #585858;}
h2{background-color:#eee;border:2px solid #a4a4a4;}
.acc_header{
    color:#ff0000;
    font-weight:bold;
}

JavaScript

var acc_header = "#acc h2";
$(acc_header).each(

function() {
    $(this).addClass("acc_header");
});