title: pointerdown vs onclick: what is the difference?
body: <p>What is the difference between the <code>onpointerdown</code> and <code>onclick</code> event handlers?</p>
  <p>Are there any practical differences? Are the events not propagated the same up the DOM tree? Are there some devices that only respond to one of these events?</p>
  <p>I initially assumed that it is only <code>pointerdown</code> that is triggered in touch devices or with a pen, but <code>onclick</code> seems to be triggered as well.</p>