JSFiddle - React, Tailwind, and code Playground

HTML

<h3>Specifications</h3>
<div class="row"> some text </div>
<div class="row"> some text 2 </div>
<div class="row"> some text 3 </div>
<div class="detail-anchor" id="pricing"></div>
<div class="row"> some text 4</div>

CSS

.foo {
    color: #C00;
}

JavaScript

$('.row:first').nextUntil(':not(.row)').addBack().addClass('foo');