Function transformer

apps/docs/plugins/remark-smartypants.js:14–18

(tree)

  const processor = retext().use(smartypants, options)

  function transformer(tree) {
    visit(tree, 'text', (node, index, parent) => {
      if (check(parent)) node.value = String(processor.processSync(node.value))
    })
  }

  return transformer
}