title: Web workers support
body: <p>Does Web worker support? </p>
  
  <ol>
  <li>XMLHttpRequest and Call back </li>
  <li>File upload </li>
  <li>Websockets</li>
  </ol>
  
  <p>I found very confusing answers in different sites.</p>
  
  <p>Thanks for your help...</p>