title: In Express.js, should I return response or not?
body: <p>For Express.js 4.x I can't find wether I should return the response (or next function) or not, so:</p>
  
  <p>This:</p>
  
  <pre><code>app.get('/url', (req, res) =&gt; {
      res.send(200, { message: 'ok' });
  });
  </code></pre>
  
  <p>Or this:</p>
  
  <pre><code>app.get('/url', (req, res) =&gt; {
      return res.send(200, { message: 'ok' });
  });
  </code></pre>
  
  <p>And what is the difference?</p>