HarmattanDeveloper & Product Guide

How The 9ja Skies turns live weather data into a local, responsive Nigerian weather experience.

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Architecture

Live weather integration

Understand how Harmattan requests current conditions and forecasts from Open-Meteo.

Product behaviour

Trace city selection, units, themes, copy, condition states, and persisted preferences.

Local context

See how Nigerian city data and product language shape the experience instead of sitting beside it.

Companion experience

Explore 9jaRun and the shared weather-data layer that keeps both experiences in sync.

Source application

DaramolaFemi/Harmattan.-Skies-over-Naija-weather-app

At a glance

text

Open-Meteo
    ↓
main.js
    ↓
weather-data.js
    ↓
UI state + product copy + weather visuals
    ↓
Harmattan

weather-data.js
    ↓
game.js
    ↓
9jaRun

The application remains deliberately lightweight: no framework, no build pipeline, and no API key stored in the client.