JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text">
<input type="text" value>
<input type="text" value="Olá Mundo!">
<input type="text" value="">

CSS

input {
    border:1px solid #ccc
}
.vazios {
    background:rgba(255, 0, 0, 0.5);
    border:1px solid red;
}

JavaScript

var s = $('input');
s.each(function () {
    var t = $(this);
    console.log(!t.val());
    if (t.val()) {
        t.addClass('exclua-me');
    }
});

var vazios = s.not('.exclua-me');

vazios.addClass('vazios');