JSFiddle - React, Tailwind, and code Playground

HTML

<input value="hi"/>
<input id=input2 value=""/>
<div id=output></div>

CSS

body {
    font-family: Verdana;
    font-size: 10pt;
}

JavaScript

var emptyInputsRound1 = $('input[value=""]');
$('#input2').attr("value",'hi2');
var emptyInputsRound2 = $('input[value=""]');
$('#output').text(emptyInputsRound1.length + ', ' + emptyInputsRound2.length);