JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" class="checkbox1" value="test"/><br />
<input type="checkbox" class="checkbox1" value="test2"/> <br />
<input type="checkbox" class="checkbox1" value="test3"/>

JavaScript

$(document).ready(function() {
    //set initial state.

   $('.checkbox1').change(function() {
    if ($(this).is(':checked')) {
        alert(this.value);
    }
});
});