, keydown: function()

in static/js/bootstrap-dropdown.js [67:106]

• 28 lines of code
• 13 McCabe index (conditional complexity)

  , keydown: function (e) {
      var $this
        , $items
        , $active
        , $parent
        , isActive
        , index

      if (!/(38|40|27)/.test(e.keyCode)) return

      $this = $(this)

      e.preventDefault()
      e.stopPropagation()

      if ($this.is('.disabled, :disabled')) return

      $parent = getParent($this)

      isActive = $parent.hasClass('open')

      if (!isActive || (isActive && e.keyCode == 27)) {
        if (e.which == 27) $parent.find(toggle).focus()
        return $this.click()
      }

      $items = $('[role=menu] li:not(.divider):visible a', $parent)

      if (!$items.length) return

      index = $items.index($items.filter(':focus'))

      if (e.keyCode == 38 && index > 0) index--                                        // up
      if (e.keyCode == 40 && index < $items.length - 1) index++                        // down
      if (!~index) index = 0

      $items
        .eq(index)
        .focus()
    }