JSFiddle - React, Tailwind, and code Playground

by Anderson Carlos Woss

HTML

<div id="foo">
  <span id="span">Span em Foo</span>
</div>

<div id="bar">
  <span id="span">Span em Bar</span>
</div>

CSS

.red {
  color: red;
}

.blue {
  color: blue;
}

JavaScript

document.querySelector('#foo #span').classList.add("red");
document.querySelector('#bar #span').classList.add("blue");