title: Failed to execute 'update' on 'ApplicationCache': there is no application cache to update
body: <p>ApplicationCache won't cache anything<br>
  <strong>index.html</strong> </p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html manifest="cache.appcache"&gt;
  &lt;head&gt;
  &lt;title&gt;Zipcode Database&lt;/title&gt;
  </code></pre>
  
  <p>File <strong>cache.appcache</strong> </p>
  
  <pre><code>CACHE MANIFEST
  my.js
  </code></pre>
  
  <p><strong>htacces</strong> file</p>
  
  <pre><code>AddType text/cache-manifest .appcache
  </code></pre>
  
  <p>When in console i run  </p>
  
  <pre><code>applicationCache.update(); 
  </code></pre>
  
  <p>then error :
   <strong>InvalidStateError: Failed to execute 'update' on 'ApplicationCache': there is no application cache to update.
  code: 11
  message: "Failed to execute 'update' on 'ApplicationCache': there is no application cache to update."
  name: "InvalidStateError"
  stack: "Error: Failed to execute 'update' on 'ApplicationCache': there is no application cache to update.↵</strong> </p>
  
  <p>And <code>applicationCache.cache =0</code> </p>