JSFiddle - React, Tailwind, and code Playground

by Alex Azuero

HTML

<div id="dermal">
    <p><input type="checkbox" value="Crows feet" rel="15">Crows feet</p>
    <p><input type="checkbox" value="Frown lines" rel="15">Frown lines</p>
    <p><input type="checkbox" value="Individual facial line" rel="15">Individual facial line</p>
</div>
<div id="wrinkle">
    <p><input type="checkbox" value="Wrinkle1" rel="30">Crows feet</p>
    <p><input type="checkbox" value="Wrinkle2" rel="15">Frown lines</p>
</div>
<span id="output"></span>

JavaScript

$(document).ready(function() {
    function recalculate() {
        var sum = 0;

        $("input[type=checkbox]:checked").each(function() {
            sum += parseInt($(this).attr("rel"));
        });

        $("#output").html(sum);
    }

    $("input[type=checkbox]").change(function() {
        recalculate();
    });
});