title: JavaScript object property not supported in IE?
body: <p>I have the following code that works perfectly fine in Chrome etc, but doesn't work in IE 11:</p>
  
  <pre><code>var fieldName="UserField";
  var fieldValue="update value here..."
  
  var obj = {
               id: 123,
               [fieldName]: fieldValue
             };
  var message="The field ["+ fieldName +"] will be updated with the value of ["+ obj[fieldName] +"]";  
  </code></pre>
  
  <p><a href="https://plnkr.co/edit/XZeIaoVSLmMlXa56oGGt?p=info" rel="nofollow noreferrer">Here is a plunker that shows the problem</a></p>
  
  <p>Since the variable is dynamic, I can't just hard-code it in.</p>
  
  <p>Any idea how I can get it to work in IE?</p>