JSFiddle - React, Tailwind, and code Playground
HTML
<label for="blue_theme">Blue</label>
<input type="checkbox" id="blue_theme"/>
<div id="container"></div>
CSS
.blue_theme{
background-color:blue;
width:200px;
height:200px;
}
JavaScript
$("#blue_theme").click(function() {
$("#container").attr('class', 'blue_theme');
})