example-async.js

'use strict'

const { promisify } = require('util')
const sleep = promisify(setTimeout)
const templates = 'templates'

const fastify = require('fastify')({
  logger: true
})

fastify.register(require('.'), {
  engine: {
    nunjucks: require('nunjucks')
  },
  templates
})

async function something () {
  await sleep(1000)
  return new Date()
}

fastify.get('/', async (req, reply) => {
  const t = await something()
  reply.view('/index.njk', { text: t })
  return reply
})

fastify.listen(3000, err => {
  if (err) throw err
  console.log(`server listening on ${fastify.server.address().port}`)
})