Build a live departure board

import { MTA } from 'mta-js'

const mta = new MTA({ apiKey: process.env.MTA_API_KEY })

const board = await mta.subway.arrivalBoard({
  lat: 40.7356,
  lon: -73.9906,
  limitStations: 5,
  limitArrivals: 3,
})

for (const { station, distanceMeters, directions } of board) {
  console.log(`${station.name} (${Math.round(distanceMeters)}m)`)
  for (const dir of directions) {
    for (const arrival of dir.arrivals) {
      console.log(`  ${arrival.route.shortName} ${dir.headsign ?? dir.direction} — ${arrival.minutes} min`)
    }
  }
}

const busBoard = await mta.bus.arrivalBoard({
  lat: 40.7421,
  lon: -73.9914,
  route: 'M23',
  limitStops: 3,
  limitArrivals: 2,
})

for (const { stop, routes } of busBoard) {
  for (const r of routes) {
    console.log(`${stop.name} — ${r.route.shortName} ${r.headsign ?? ''}`)
  }
}