JSFiddle - React, Tailwind, and code Playground

HTML

<button id="orderconfirm">test</button>

<input type="checkbox" />

CSS

.highlight:after {
    display:block;
    content: "highlight";
    padding-left:15px;
}

JavaScript

$('#orderconfirm').click(function () {
    $('input:checkbox:not(:checked)')
        .addClass('highlight');
});