JSFiddle - React, Tailwind, and code Playground

HTML

<div class="one">one</div>
<div class="one two">one two</div>
<div class="one">one</div>
<div class="one">one</div>
<div class="two three">two three</div>
<div class="one">one</div>
<div class="one">one</div>
<div class="one">one</div>
<div class="four five anything">four five anything</div>
<div class="one">one</div>

CSS

div {
    padding: 10px;
    margin: 10px;
    background: #023838;
    
    font-weight: bold;
    color: #fff;
    font-family: sans-serif;
}

JavaScript

jQuery.expr[':'].hasMultipleClasses = function(elem, index, match) {
    return elem.className.split(' ').length > 1;
};

$('div:hasMultipleClasses').css('background', 'teal');