title: Does codemirror provide Cut, Copy and Paste API?
body: <p>From <a href="http://codemirror.net/doc/manual.html" rel="noreferrer">http://codemirror.net/doc/manual.html</a>, I only find <code>getRange()</code>,
  undo(), redo() etc, and I can't find cut(), copy() and paste API,
  and more when I try to run <code>editor.execCommand("cut")</code>, I get the error.
  Could you help me? Thanks!</p>