title: How to enable support for class properties in the latest version BabelJS?
body: <p>Does anyone know how to enable support for properties of a class in the latest version BabelJS?  </p>
  
  <pre><code>import React from 'react';
  import {Component} from 'react';
  
  export default class Button extends Component {
      constructor(){
          super();
      }
  
      myProp = {}; //  ERROR: /path/to/file/Button.jsx: Unexpected token (9:11)
  
      render(){
          return &lt;div&gt;&lt;/div&gt;;
      }
  }
  </code></pre>