title: How can I style active Link in react-router v4?
body: <p>In react-router v3 we had activeStyle and activeClassName to style active Link</p>
  
  <p>we could do something like this</p>
  
  <pre><code>  &lt;div id="tags-container"&gt;
      {tags.map(t =&gt;
        &lt;Link
          className="tags"
          activeStyle={{ color: 'red' }}
          to={t.path}
        &gt;
          {t.title}
        &lt;/Link&gt;
      )}
    &lt;/div&gt;
  </code></pre>
  
  <p>I wanna know how can I do same thing in v4?</p>