How do I create a conditional form value in a Jade template?
<p>I have a jade template form in my express project. the form has a form field that is normally blank, but under some circumstances I am pre-populating form fields ). Here is my jade template</p>

<pre><code>    input.form-control(type='text', name='name', id='name', value=site.name, autofocus=true)
</code></pre>

<p>the problem I am having is that sometimes site, and hence site.name is undefined. How do I conditionally place a variable in the value of a form based on it's existence.</p>