JSFiddle - React, Tailwind, and code Playground

HTML

<div id="res1">b</div>
<div id="res2"></div>
<div id="res3"></div>
<div id="res4">a</div>

JavaScript

const divs = document.querySelectorAll('div');

divs.forEach(div => {
  if (divs.innerHTML === '' || div.textContent === '') {
    div.remove();
  }
});