JSFiddle - React, Tailwind, and code Playground

by DigitalBiscuits

HTML

<input class="span4 input-big" id="dare_price" name="price" size="30" type="text" />
<input class="span4 input-big" id="total_price_amount" readonly="readonly" value=""/>

JavaScript

$(document).ready(function()
{
    function updatePrice()
    {
        var price = parseFloat($("#dare_price").val());
        var total = (price + 1) * 1.05;
        var total = total.toFixed(2);
        $("#total_price_amount").val(total);
    }
    $(document).on("change, keyup", "#dare_price", updatePrice);
});