title: Angular4 Application running issues in IE11
body: <p>I am building a Angular4 project using Angular CLI (1.1.2). It runs perfectly in Chrome (Version 59.0.3071.115) and firefox(54.0.1) but when I tried to use IE11 (Verison 11.0.9600.18738) nothings shows up and when I open the develper mode in IE, it shows me the following Error:</p>
  
  <pre><code>SCRIPT5022: Exception thrown and not caught
  File: polyfills.bundle.js, Line: 829, Column: 34
  </code></pre>
  
  <p>And the detailed Error message is following:</p>
  
  <p><a href="https://i.stack.imgur.com/O2L2B.png" rel="noreferrer"><img src="https://i.stack.imgur.com/O2L2B.png" alt="enter image description here"></a></p>
  
  <p>Anyone knows how to solve this problem?</p>
  
  <p>Thanks!</p>