JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <input type='text' class='inputBox' /><br/>
    <textarea class='inputBox'></textarea><br/>
</div>
<button id='show'>Show</button>

JavaScript

$(document).ready(function() {
    $('#show').click(function() {
        var total = 0;
        $('div .inputBox').each(function() {
            total += this.value.length;
        });
        if (total == 0) {
            // Do whatever if it's empty
        } else {
            alert(total);
            // Do whatever if its not
        }
    });
});