title: React-app not working in Internet Explorer 11
body: <p>I have a react app and I need it to work in Internet Explorer 11. I use Material-UI and some others tiny libraries. Right now, I just can see a blank page. I tried the next solutions (without success):</p>
  
  <ol>
  <li><p>I added react-app-polyfill for ie11 as my first lines in index.js:</p>
  
  <p><code>import 'react-app-polyfill/ie11';</code>
  <code>import 'react-app-polyfill/stable';</code> </p></li>
  <li><p>In my package.json I added Internet Explorer 11:</p>
  
  <pre><code>    "production": [
        "&gt;0.2%",
        "not dead",
        "not op_mini all",
        "ie 11"
      ],
      "development": [
        "&gt;0.2%",
        "not dead",
        "not op_mini all",
        "ie 11"
      ]
    }```
  </code></pre></li>
  </ol>
  
  <p>And I have the next errors (Translated from spanish):</p>
  
  <blockquote>
    <p>Access to property "caller" from a function or object is not allowed in strict mode.</p>
    
    <p>The object doesn't accept the property or function "repeat"</p>
  </blockquote>
  
  <p>Could somebody more experiencied with this topic help me?
  Thanks!</p>