Exemple : page de suivi de livraison

// node server.mjs   (NWAYS_SERVER_KEY dans l’environnement)
import { readFile } from 'node:fs/promises'
import { createServer } from 'node:http'

const KEY = process.env.NWAYS_SERVER_KEY
const fleet = async (path) => {
  const res = await fetch('https://nways.ng/maps/v1/fleet' + path, { headers: { 'X-NWays-Api-Key': KEY } })
  const data = await res.json()
  if (!res.ok) throw Object.assign(new Error(data.error?.message), { status: res.status, reason: data.error?.reason })
  return data
}

// Ce que le client peut voir de sa commande : ni nom ni téléphone du livreur, ni historique.
async function tracking(orderId) {
  const task = await fleet(`/tasks/${encodeURIComponent(orderId)}`)
  const vehicle = task.vehicleId ? await fleet(`/vehicles/${encodeURIComponent(task.vehicleId)}`) : null
  const live = ['assigned', 'picked_up', 'arriving'].includes(task.status)
  return {
    status: task.status,
    dropoff: { lat: task.dropoff.lat, lng: task.dropoff.lng },
    eta: task.eta ? { at: task.eta.at, minutes: Math.round(task.eta.durationS / 60) } : null,
    rider: live && vehicle?.online && vehicle.lastLocation ? { lat: vehicle.lastLocation.lat, lng: vehicle.lastLocation.lng } : null,
  }
}

createServer(async (req, res) => {
  const m = req.url.match(/^\/track\/([\w.:-]{1,64})\.json$/)
  try {
    if (m) {
      res.writeHead(200, { 'Content-Type': 'application/json', 'Cache-Control': 'no-store' })
      return res.end(JSON.stringify(await tracking(m[1])))
    }
    res.writeHead(200, { 'Content-Type': 'text/html; charset=utf-8' })
    res.end(await readFile(new URL('./track.html', import.meta.url)))
  } catch (e) {
    res.writeHead(e.reason === 'TASK_NOT_FOUND' ? 404 : 502, { 'Content-Type': 'application/json' })
    res.end(JSON.stringify({ error: e.reason ?? 'ERROR' }))
  }
}).listen(8080, () => console.log('http://localhost:8080/?order=order-1041'))

<!doctype html>
<html lang="fr">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta name="robots" content="noindex" />
    <title>Votre livraison</title>
    <link rel="stylesheet" href="https://nways.ng/sdk/v1/maplibre-gl.css" />
    <style>
      body { margin: 0; font: 16px/1.4 system-ui, sans-serif }
      #map { height: 70vh }
      #info { padding: 16px }
      #info b { font-size: 1.5em; display: block }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <div id="info" aria-live="polite">Chargement…</div>
    <script type="module">
      import { createMap, maplibregl } from 'https://nways.ng/sdk/v1/nways-maps.standalone.js'

      const order = new URLSearchParams(location.search).get('order')
      const info = document.getElementById('info')
      const map = createMap({ container: 'map', key: 'VOTRE_CLE_SITE', lang: 'fr', zoom: 14 })
      const home = new maplibregl.Marker({ color: '#0b7a3e' })
      const rider = new maplibregl.Marker({ color: '#1a73e8' })
      const WORDS = { assigned: 'Votre livreur va chercher votre commande', picked_up: 'En route vers vous', arriving: 'Arrive maintenant', completed: 'Livrée', failed: 'Échec de la livraison', cancelled: 'Annulée', created: 'En préparation' }
      let framed = false

      async function update() {
        const res = await fetch(`/track/${encodeURIComponent(order)}.json`)
        if (!res.ok) return void (info.textContent = 'Nous ne trouvons pas cette livraison.')
        const t = await res.json()
        home.setLngLat([t.dropoff.lng, t.dropoff.lat]).addTo(map)
        if (t.rider) rider.setLngLat([t.rider.lng, t.rider.lat]).addTo(map)
        else rider.remove()
        if (!framed) {
          const box = new maplibregl.LngLatBounds([t.dropoff.lng, t.dropoff.lat], [t.dropoff.lng, t.dropoff.lat])
          if (t.rider) box.extend([t.rider.lng, t.rider.lat])
          map.fitBounds(box, { padding: 80, maxZoom: 16, duration: 0 })
          framed = true
        }
        const when = t.eta ? new Date(t.eta.at).toLocaleTimeString([], { hour: 'numeric', minute: '2-digit' }) : null
        info.innerHTML = ''
        info.append(
          Object.assign(document.createElement('b'), { textContent: when ? `Arrivée vers ${when}` : (WORDS[t.status] ?? t.status) }),
          t.eta ? `${WORDS[t.status] ?? ''} · ${t.eta.minutes} min` : '',
        )
        if (['completed', 'failed', 'cancelled'].includes(t.status)) clearInterval(timer)
      }

      const timer = setInterval(update, 10000)
      update()
    </script>
  </body>
</html>