blog.js

const contentfulAPI = require('./contentful')

module.exports = (data) => {
  const slug = data.fields.slug['en-US']

  contentfulAPI.getEntries({
    content_type: 'passports',
    'fields.slug': slug,
    include: 8
  }).then(({ items }) => {
    const { fields } = items[0]
    console.log('api fetch of fields', fields)
  })
}