Res Render

Render a view with a callback responding with the rendered string. When an error occurs next(err) is invoked internally. When a callback is provided both the possible error and rendered string are passed, and no automated response is performed.

res.render('index', function (err, html) {
  // ...
})

res.render('user', { name: 'Tobi' }, function (err, html) {
  // ...
})