title: Blob download is not working in IE
body: <p>I have this in my Angular.js controller that downloads a CSV file:</p>
  
  <pre class="lang-js prettyprint-override"><code> var blob = new Blob([csvContent.join('')], { type: 'text/csv;charset=utf-8'});
   var link = document.createElementNS('http://www.w3.org/1999/xhtml', 'a');
   link.href = URL.createObjectURL(blob);
   link.download = 'teams.csv';
   link.click();
  </code></pre>
  
  <p>This works perfectly in Chrome but not in IE. A browser console log says:</p>
  
  <blockquote>
    <p>HTML7007: One or more blob URLs were revoked by closing the blob for
    which they were created. These URLs will no longer resolve as the data
    backing the URL has been freed.</p>
  </blockquote>
  
  <p>What does it mean and how can I fix it? </p>