JSFiddle - React, Tailwind, and code Playground

HTML

<div class="form">
    <input type="text"/><br />
    <input type="text"/>
</div>
<p class="congrats">Congrats</p>

CSS

p.congrats{display:none;}

JavaScript

$(document).ready( function()
{
    // Iterate over each input element in the div
    $('.form input').each(function()
    {
        $(this).blur( function()
        {
            var complete = true;

            $('.form input').each(function()
            {
                if ( !$(this).val() )
                {
                    complete = false;
                }
            });
            
            if ( complete == true )
            {
                $('.congrats').show();
            }
        });
    });
});