title: React doesn't show errors in terminal and browser
body: <p>I've created a new app with react-create-app.
  Here's my code:</p>
  <pre><code>function App() {
    let m;
    console.log(m); // undefined
    console.log(m.prop); // should throw an error
    return (
      &lt;div className=&quot;App&quot;&gt;
          App
      &lt;/div&gt;
    );
  }
  </code></pre>
  <p>My app compiles successfully and I can see this error only in the chrome devtools console, but not in the IDE terminal or in the browser's page. Browser shows me an empty page, how can I change this behavior?</p>