Sydenham Station Departures

Simple static web app that shows live departures for Sydenham Station:

• Overground (Windrush) — both directions, via the TfL Unified API
• Southern — both directions, via a National Rail (Darwin) JSON proxy

It also registers a service worker (sw.js) to cache basic assets for offline/slow-network use (PWA-style).

What it displays

• A single departure list mixing Overground and Southern, sorted by expected departure time
• Overground: all Windrush arrivals at 910GSYDENHM (inbound and outbound)
• Southern: National Rail departures at CRS SYD operated by Southern (SN)
• Each row shows platform direction (→ for Platform 1, ← for Platform 2), operator icon (Overground / Southern), countdown, and destination
• Countdown shows minutes remaining (e.g. 3 min), Due, Cancelled, or Delayed
• Refreshes the departures list every 60 seconds

Configuration

Data sources are configured in index.html inside the fetch helpers:

• TfL stop point: 910GSYDENHM (Overground / Windrush)
• National Rail CRS: SYD (Southern), via https://national-rail-api.davwheat.dev/

If you need a different stop or operator, update the fetch URLs / filters in index.html.

Local development / running

Because this is a static site, you can serve it with any local static server.

Example (Python):

python3 -m http.server 8000

Then open:

• http://localhost:8000

PWA / service worker notes

• The page registers /sw.js on load (navigator.serviceWorker.register('/sw.js')).
• For the service worker to work correctly:
  • Use HTTPS in production, or
  • Use http://localhost when testing locally.
• manifest.json references icon files (icon-192.png, icon-512.png). Those files are expected to exist in the site root.
  • If you don’t have them, update the icons section of manifest.json (or add the missing PNGs).

License

Add a license header/file if you plan to publish this project.