jade: if statements and nesting

Answer 1

You need to separate control flow from the template. Try this:

divClass = null

if isFixed
   divClass = "fixed"

div(class=divClass)
   p inner element

Which in turn might suggest factoring out the "isFixed" parameter into the actual divClass parameter to be passed on. But that depends on your remaining code/template of course.

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As an alternative, try a mixin:

mixin content
  p inner element

if (isFixed)
  div(class="test")
    mixin content
else
  div(class="other")
    mixin content