title: websocket.send() parameter
body: <p>Usually, we only put the data we want to send as <code>websocket.send()</code> method's parameter, but I want to know whether there are other parameters like IP that we can put inside the brackets. Can we use it this way:</p>
  
  <pre><code>websocket.send(ip, data);  // send data to this ip address
  </code></pre>
  
  <p>Or I should call other methods?</p>