// link to css e.g.: +css('foo.css')
mixin css(href)
  link(rel='stylesheet', href=href)

// to prevent pinch zoom add this mixin to head block
mixin prevent-zoom
  meta(name="viewport", content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0")

// javascript file e.g. +script('foo.js')
mixin script(src)
  script(src=src)

// context sensitivity
// usage: +show-if(activeWindowTitle='regular-expression-string')
mixin show-if
  div(data-active-window-title=attributes.activeWindowTitle)
    block