title: react Material-ui, How do I know I can use onClick for button?
body: <p>The list of properties on the doc doesn't include <code>onClick</code> 
  (<a href="http://www.material-ui.com/#/components/icon-button" rel="noreferrer">http://www.material-ui.com/#/components/icon-button</a>)</p>
  
  <p>How do I know I need to use onClick for click handler?</p>