Material Weather

Material Weather is a compact browser extension popup for checking weather across multiple saved locations. It is built with WXT, Svelte 5, and the Open-Meteo APIs.

Features

• Current conditions plus hourly and multi-day forecast
• Multiple saved locations with quick switching
• Location management with add, remove, and manual reordering
• Persisted °C / °F preference
• Persisted light/dark theme toggle for the popup
• Local forecast caching to avoid unnecessary repeat requests
• Weather data from Open-Meteo with no API key required

Requirements

• Bun
• Firefox or a Chromium-based browser for local testing

Setup

bun install

Development

Start the Firefox version with hot reload:

bun run dev:firefox

Start the Chromium version:

bun run dev

Both commands open a temporary browser profile with the extension loaded.

Validation

Run the Svelte and TypeScript checks:

bun run check

Building

Build a production bundle for Firefox:

bun run build:firefox

Build a production bundle for Chromium:

bun run build

Build output is written to .output/.

Packaging

Create a Firefox zip for distribution:

bun run zip:firefox

Create a Chromium zip:

bun run zip

Generated archives are written to .output/.

Project structure

src/
├── assets/
│   └── tailwind.css         # Tailwind entry and popup theme tokens
├── entrypoints/
│   └── popup/
│       ├── App.svelte       # Popup router bootstrap
│       └── main.ts          # Popup entry and theme setup
└── lib/
    ├── pages/
    │   ├── landing.svelte   # First-run location setup
    │   ├── locations.svelte # Saved locations management
    │   └── weather.svelte   # Forecast view
    ├── routes.ts            # Popup route map
    ├── stores.ts            # WXT storage items
    ├── theme.ts             # Theme helpers
    ├── types/               # Shared TypeScript types
    └── weather.ts           # Open-Meteo API calls and weather helpers

Tech stack

Data & privacy

No account or API key is required. The extension makes direct requests to:

• https://geocoding-api.open-meteo.com for city search
• https://api.open-meteo.com for forecast data

Saved locations, popup settings, and forecast cache entries are stored locally in the browser via storage.local. No user account data is collected and nothing is sent anywhere except the weather API requests above.