JSFiddle - React, Tailwind, and code Playground

by Buntel

HTML

<div class="popup">Button1
   <span class="myPopup">Text inside popup</span>
</div>
<div class="popup">Button2
   <span class="myPopup">Text inside popup</span>
</div>

CSS

.show {
  color: red;
}

JavaScript

const elements = document.querySelectorAll(".popup")
elements.forEach(el => {
  el.onclick = function(event) {
    this.classList.toggle("show")
  }
})