title: How does display:none; effect css for mobile devices?
body: <p>If we have hidden some stuff using display:none; for example: images , will it still be downloaded by rendering engine? If yes, does that mean while opening the same web page in mobile, it's going to be unnecessary extra weight to download?</p>
  
  <p>This can further mean that modifying the same webpage for mobile can be a bad idea. Please advice. Thanks.</p>