JSFiddle - React, Tailwind, and code Playground

HTML

<div class="isItImportant" style="background-color:red;width:100px;height:100px;"></div>

CSS

/*but this should change the styling*/
        .isItImportant {
            /*this should not change anything*/
            background-color:green !important;
        }

 /*this should not change anything*/
        .isItImportant {
            background-color:fuchsia;
        }