title: React doesn't update when CSS File is changed
body: <p>So I'm new to React.
  I want to style a simple text and found out how to use styles, but when I want to change something in the CSS I have to restart my React App which always takes 3 Minutes.</p>
  <p>I use <code>npm start</code> to start the React server that was created with create-react-app.</p>
  <p>How can I let React update when the CSS file is changed?</p>
  <p><br />
  I have an index.js that looks like this:</p>
  <pre><code>import React, { Component } from 'react';
  import ReactDOM from 'react-dom';
  import App from  './Frontend/App.js';
  import './Frontend/style/main.css';
  
  ReactDOM.render(&lt;App/&gt;, document.getElementById('root'));
  </code></pre>
  <p>And an App.js that looks like this:</p>
  <pre><code>import React, { Component } from 'react';
  import ReactDOM from 'react-dom';
  import './style/main.css';
  
  class App extends Component {
      render() {
          var pageHeading = (
              &lt;h1 className=&quot;pageHeading&quot;&gt;bosleeir.it&lt;/h1&gt;);
          return pageHeading;
      }
  }
  
  export default App;
  </code></pre>