title: Set in javascript not working in IE11. Initialized to empty set
body: <p>I am using set initialization with javascript using :</p>
  
  <pre><code>var set1 = new Set(["sumit","sumit","amit","anil","anish"]); 
  </code></pre>
  
  <p>This set works in firefox and chrome, however the set1 value is not populated in set1. Looking in set1, I have empty set.</p>
  
  <p>How to use set initailaization using javascript that works in IE11?</p>