JSFiddle - React, Tailwind, and code Playground

HTML

<div class="clon">Click Me!</div>

CSS

.cloff {
    background-color:#fff;
    color:#000;
    -webkit-transition: all 1s;
    -moz-transition: all 1s;
    -o-transition: all 1s;
    transition:all 1s;
}

.clon{
    background-color:#000;
    color:#fff;
    -webkit-transition: all 1s;
    -moz-transition: all 1s;
    -o-transition: all 1s;
    transition:all 1s;
}

JavaScript

$('.clon, .cloff').on('click', function() {
    $(this).toggleClass('clon cloff');
});