JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li class="mybutton" data-id="12345"></li>
  <li class="mybutton" data-id="23456"></li>
  <li class="mybutton" data-id="34567"></li>
</ul>

JavaScript

var buttons = document.getElementsByClassName('mybutton');
for (var i = 0; i < buttons.length; i++) {
  var button = buttons[i];
  button.innerHTML = "my button html template with id: "+ button.dataset.id;
}