JSFiddle - React, Tailwind, and code Playground

by Stefano Pascazi

HTML

<form name="Form">
 <label>Inserisci il prezzo</label>
 <input type="text" id="price" name="price" onKeyup="calculate_VAT()" />
</form>
<div id="wrapper">
    <div>IVA:</div>
    <div id="vat">0</div>
</div>

CSS

#wrapper > div {
    display:inline-block;
}

JavaScript

function calculate_VAT() {
    var price = document.Form.price.value;
    var vat = price * 0.22;
    document.getElementById('vat').innerHTML = vat ;
}