JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <body>
        <form id="frm1">
            <label><input type="checkbox" value="red" name="colours" /> Red</label>
            <label><input type="checkbox" value="blue" name="colours" /> Blue</label>
            <label><input type="checkbox" value="blue" name="colours" /> Green</label>
       </form>
    </body>
</html>

JavaScript

$(document).ready(function(){
    $('input').bind('click', function(e){
        alert($(this).attr('checked'));
    });
});