<h1>Title</h1>
<div>
  <button type="button" onclick="buttonPressed()">A button</button>
</div>
* {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  }
function buttonPressed() {
  alert('button clicked');
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.