The problem: We have created a menu with optionSplit, for the last menuitem you have 2 css classes.

How we can see easily at the following picture the last menueitem depends on the item before, it does need a dark or a light background.

With optionSplit its quite simple to change the 2 colors. But how you know if the last item needs a light or dark background?

Have a look at following typoscript snippet:

temp.mymenu=HMENU
temp.mymenu.1=TMENU
temp.mymenu.1.NO {
  # optionSplit for the first menuitem and the following, one dark one light
  allWrap = | |*| |||||*|
  allWrap.override.cObject=COA
  allWrap.override.cObject{
    # the override of the allWrap property is executed if the actual menuitem (register:count_HMENU_MENUOBJ) is the last(register:count_menuItems)
    if.value.data=register:count_menuItems
    if.equals.data=register:count_HMENU_MENUOBJ
    10=TEXT
    10{
       # sets the light class for a odd count of the menuitems
      value=|
      if.isFalse.prioriCalc=1
      if.isFalse.cObject=TEXT
      if.isFalse.cObject.insertData=1
      if.isFalse.cObject.value={register:count_HMENU_MENUOBJ}%2
    }
    20<.10
    # Negate the whole thing and set the dark class in this case
     
    20.if.negate=1
    20.value=|
  }
}

More information:

tsref stdWrap (override,prioriCalc)

tsref optionSplit

tsref if

2 menues: divide pages in even and odd

Forum thread that leadet to this solution (german)