JSFiddle - React, Tailwind, and code Playground

HTML

<div class="myclass class1"> test </div>
<div class="myclass class2"> test </div>
<div class="myclass class3"> test </div>
<div class="myclass class4"> test </div>
<div class="myclass test"> test </div>

CSS

.myclass[class^="myclass class"]{
    color: blue;
}