title: I try to make my Material-UI RaisedButton link to an external url without success?
body: <p>As the question in the title state.</p>
  
  <p>Playing with react, react-router and material-ui and in one place I want to make an action button in a Card component link to an external url, like
   without success.</p>
  
  <p>I'm currently thinking of adding an event handler to use window.open, but it must be a smarter way?</p>
  
  <p>I did find a solution, before the code looked like this.</p>
  
  <pre><code>&lt;CardActions&gt;
     &lt;RaisedButton
         href={this.props.url}
         label="OK"
     /&gt;
  &lt;/CardActions&gt;
  </code></pre>
  
  <p>The solution was very simple:</p>
  
  <pre><code>&lt;CardActions&gt;
     &lt;a href={this.props.url} target="_blank"&gt;
       &lt;RaisedButton
          label="OK"
       /&gt;
     &lt;/a&gt;
  &lt;/CardActions&gt;
  </code></pre>