title: Why is react removing my class names?
body: <p>I'm learning Reactjs, and I am rendering a simple page with some components.
  One of this components is this: </p>
  
  <pre><code>class Header extends React.Component {
      render(){
          return  (
              &lt;header&gt;
                  &lt;div class="container"&gt;
                      &lt;Logo /&gt;
                      &lt;Navigation /&gt;
                  &lt;/div&gt;
              &lt;/header&gt;
          );
      }
  }
  
  export default Header
  </code></pre>
  
  <p>I'm using <strong>Bootstrap CSS</strong> I want the <code>div</code> inside the header to use the styles of <code>container</code>, how ever, after build, the class is gone.</p>
  
  <p>Is there a way to force the attribute class in the components?</p>