     collapseLabel = I18n.t 'js.less_filter_options'
     offer_filter_open = sessionStorage.getItem("offer_filter_open")
 
+    # Detect or set state: offer_filter_open
     unless offer_filter_open == "true"
       $filterForm
               .addClass 'filter-form--isCollapsed'

initFilterForm = ->
  initFilterExpand = ->

    $filterForm = $('.filter-form')

          .html collapseLabel
          .attr 'aria-expanded', true

    # var $expander here, after creation
    $expander = $('.filter-form__expander')

    # Click handling for expander button click
    $expander.on 'click', ->

      if $filterForm.hasClass('filter-form--isCollapsed')
