Just a little code snippet to help you building a one pager website with TYPO3 CMS

Create a One Pager with TYPO3 and TypoScript

// The one pager navigation
// You can choose any field from the page record with "{field:fieldname}"
// But I would recommend the field "alias" since it makes sense the most for navigation

lib.onepageMenu = HMENU
lib.onepageMenu{
    special = directory
    special.value = 44
    1 = TMENU
    1{
        wrap = <nav class="navbar"><ul class="nav navbar-nav"> | </ul></nav>
        NO{
            doNotLinkIt = 1
            wrapItemAndSub = <li class="nav-item"><a class="nav-item" href="#{field:alias}">|</a></li>
            wrapItemAndSub.insertData = 1
        }		
    }
}


// We are using a menu to get the content related to the subpages of the root page

lib.onepageContent = HMENU
lib.onepageContent {
  1 = TMENU
  1 {
    NO = 1
    NO {
      doNotLinkIt = 1
      stdWrap >
      stdWrap {
        cObject = COA
        cObject {
          20 = CONTENT
          20 {
            table = tt_content
            select {
                pidInList.field = uid
		where = (tx_gridelements_container = 0) # Very important to NOT show contents 2 times when you use Gridelemenents
            }
            wrap = <div class="container" id="{field:alias}">|</div>
            wrap.insertData = 1
            renderObj < tt_content
          }
        }
      }
    }
  }
}


// Finally add the content to your fluid template through a variable

page{
  10 = FLUIDTEMPLATE
	10{
      variables {
          contentMain < lib.onepageContent
      }
  }
}