PWA with React + Leaflet: lessons from a 31-city map app

Notes from shipping a real-world PWA in Korea:

1. Vite SSG is worth it. SPAs lose Korean SEO because Naver's crawler doesn't fully render JS.
2. Leaflet > Mapbox for cost-sensitive projects. Free OSM tiles + zero cost.
3. Firebase Hosting rewrites let you have deep URLs (/city/suwon) without a backend.
4. KakaoTalk share is non-negotiable in Korea — 70%+ of social traffic.
5. PWA install banner: don't auto-prompt, let the user discover.

Project: https://gyeonggi-currency-map.web.app?ref=devto&utm_source=devto&utm_medium=social&utm_campaign=multi-site-bot