JSFiddle - React, Tailwind, and code Playground
HTML
<div class="testOn">TEST</div>
<button id="tog">Change</button>
CSS
.testOn {background-color:#3c3c3c;}
.testOff {background-color:#3c3c3c;}
JavaScript
$('#tog').click(function() {
$('.testOn').toggleClass(function(i, c, s) {
alert(i);
alert(c);
alert(s);
return("testOff");
}, true);
});