title: node.js SPA with expressjs
body: <p>For a specified route, I do <code>res.render('item/index');</code> </p>
  
  <p>means I render the entire .jade file. How to load the jade template as ajax? Imagine I'm building a dashboard, when I click on item links, I want the template to load into the right column, not to reload the entire page again.</p>
  
  <p>if I merely do <code>res.json('item/index');</code> I will see json data, how do I render the data into my template?</p>