Execute Selectivizr polyfills dynamically on every `$digest` cycle

bootstrap.coffee

# NWMatcher.js
# Load only in IE8-
# //cdnjs.cloudflare.com/ajax/libs/nwmatcher/1.2.5/nwmatcher.js

app.run [
  '$rootScope', '$rootElement', '$timeout'
  ($rootScope, $rootElement, $timeout) ->
    return if not NW? # don't add any watchers if our browser doesn't suck
    
    selectivize = ->
      elements = NW.Dom.select ':last-child', $rootElement[0]
      angular.forEach elements, (el) ->
        angular.element(el).addClass 'last-child'
        
    execute = null
    
    # watch fires on every $digest
    $rootScope.$watch ->
      
      $timeout.cancel execute if execute
      execute = $timeout selectivize, 0, false
      
      return true
]