Here’s something I used to select all subpages of a Notion page that used a specific emoji icon:

const notion = new Client({ auth: process.env.NOTION_API_KEY })
const pageId = process.env.NOTION_PAGE_ID

async function getAllSubpagesOfPage(page, notion) {
  const pages = []

  const blocks = await notion.blocks.children.list({
    block_id: page.id,
  })
  for (const block of blocks.results) {
    if (block.type === 'child_page') {
      // we need to add icons to the block because
      // it's not provided by default
      const temp = await notion.pages.retrieve({ page_id: block.id })
      block.icon = temp.icon
      pages.push(block)
    }
  }

  return pages
}

const pages = await getAllSubpagesOfPage(page, notion)

pages.map(async (page) => {
  if (page.icon?.emoji === '✅') {
    // ok, the page has that emoji
  }
})

Lessons in this unit: