title: How to cancel an HTML5 drag (and drop) operation using Javascript?
body: <p>I want to cancel an HTML5 drag operation based on some condition. I have tried to search this but found nothing useful. It seems that there is no way to cancel an HTML5 drag and drop using JavaScript. <code>return</code>ing <code>false</code> in the <code>dragstart</code> doesn't seem to do anything. Any ideas?</p>