title: window.clipboardData is not part of Javascript?
body: <p>In my <a href="https://stackoverflow.com/questions/5277882/how-to-select-all-webview-content-using-javascript">search</a> for a Javascript way to programmatically select WebView content, I encountered <a href="https://stackoverflow.com/questions/4567687/javascript-click-copy-the-content-to-the-clipboard">this Javascript code snippet</a>, which uses a method named setData() in a member named clipboardData in the window object.</p>
  
  <p>But when I tried to find documentation for it in a <a href="http://www.w3schools.com/jsref/obj_window.asp" rel="nofollow noreferrer">Javascript reference</a>, clipboardData was nowhere to be found.</p>
  
  <p>Why?</p>
  
  <p>Isn't window.clipboardData not part of Javascript or DOM?</p>