JSFiddle - React, Tailwind, and code Playground
HTML
<div class="formfld grey" id="frm">
<input type="checkbox" class="clicker" />Name</div>
CSS
.formfld {
padding:5px;
}
.grey {
background-color:#CCCCCC;
}
.green {
background-color:#006600;
}
JavaScript
$(".clicker").change(function () {
$('div.formfld').toggleClass('green');
});