title: Meta viewport : width=device-width or initial-scale=1 or both
body: <p>For a fully responsive web design, which one of the following meta viewport declaration should I use :</p>
  
  <pre><code>&lt;meta name="viewport" content="width=device-width" /&gt;
  &lt;meta name="viewport" content="initial-scale=1.0" /&gt;
  &lt;meta name="viewport" content="width=device-width, initial-scale=1.0" /&gt;
  </code></pre>
  
  <p>I would like the design to fit the screen after rotating the device.</p>