Make Jade (Pug) fail if variable cannot be resolved

Question

It seems that if Jade (Pug) cannot resolve a variable it treats it as not set.

Is there a possibility to make it fail during rendering of the template?

Controller code:

exports.index = function (req, res) {
    res.render('index', {})
};

Template code:

extends layout

block content
    p Value is "#{val}"

Result:

<p>Value is ""</p>

This does not detect bugs early and thus I would like Jade to throw an exception when something like this happens. Is it possible ?

Answer 1

You should be able to use conditionals for this like so:

block content
  if val
    p Value is "#{val}"
  else
    p Value is undefined

or

block content
  if val !== ""
    p Value is "#{val}"
  else
    p Value is undefined