title: ReactJS - SCRIPT1010: Expected identifier - Production build not running on IE11
body: <p>I created a new project with create-react-app today. The production build is not running fine on IE11, the console shows following error:</p>
  
  <p><code>SCRIPT1010: Expected identifier</code></p>
  
  <p>The line it points to inside my main.js:</p>
  
  <p><code>{var n=e&amp;&amp;e.__esModule?function(){return e.default}:function(){return e};</code></p>
  
  <p>The error is after the e.(default) above. My package json is plain:</p>
  
  <pre><code>{
    "name": "sample-app",
    "version": "0.1.0",
    "private": true,
    "dependencies": {
      "react": "^16.3.1",
      "react-dom": "^16.3.1",
      "react-scripts": "1.1.4"
    },
    "scripts": {
      "start": "react-scripts start",
      "build": "react-scripts build",
      "test": "react-scripts test --env=jsdom",
      "eject": "react-scripts eject"
    }
  }
  </code></pre>
  
  <p>Strange enough, my dev server works perfectly on IE11 so issue is only with production build. It works well on Chrome as well. Is that I need to have polyfills?</p>