angular-docs-cn/public/_includes/_next-item.jade

currentPage = false
nextPage = false
data = public.docs[current.path[1]][current.path[2]][current.path[3]]._data

for page, slug in data

  // CHECK IF CURRENT PAGE IS SET, THEN SET NEXT PAGE
  if currentPage
    if !nextPage
      .l-sub-section
        h3 Next Step
        a(href="/docs/#{current.path[1]}/#{current.path[2]}/#{current.path[3]}/#{slug}.html") #{page.title}

      //NEXT PAGE HAS NOW BEEN SET
      nextPage = true

  // SET CURRENT PAGE FLAG WHEN YOU PASS IT
  if current.path[4] == slug
    currentPage = true