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

  if slug != "index"
    // 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