JSFiddle - React, Tailwind, and code Playground

HTML

<p id="para-01"><span>First span</span></p>
<p id="para-02">
  <span>Second span</span>
</p>

JavaScript

console.log(document.getElementById('para-01').firstChild.nodeName)
  console.log(document.getElementById('para-02').firstChild.nodeName)