JSFiddle - React, Tailwind, and code Playground
HTML
<div class="one">One</div>
<div class="two">two</div>
<div >three</div>
<div >four</div>
<div class="three">five</div>
JavaScript
$("div:not([class])").css("border", "2px solid #f00");
<div class="one">One</div>
<div class="two">two</div>
<div >three</div>
<div >four</div>
<div class="three">five</div>
$("div:not([class])").css("border", "2px solid #f00");