functyon

{
  components: {
    Render: {
      functional: true,
      render: (h, ctx) => ctx.props.vnode
    }
  }
}

<div class="header">
  <render :vnode="$slots.menu"></render>
</div>
<div class="fixed-header">
  <render :vnode="$slots.menu"></render>
</div>