JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="a" value="1" />
<br>
<input type="text" id="b" value="2" />
<br>

JavaScript

$(document).ready(function(){   
    if ($.inArray("",[ $("#a").val(), $("#b").val() ])>=0)
    {
        alert("Either a or b is Empty!");   
    }
    else   
    {
         alert("Not Empty!");
    }
});