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# What is Local-first Web Development?


- **Date:** Friday, Jul 10, 2026
- **Time:** 09:00–09:30 (30 min)
- **Room:** Stage 5
- **Event:** World Congress 2026 Europe

## Recording

[Watch recording](https://www.wearedevelopers.com/videos/100187-what-is-local-first-web-development)

## Description

Users expect apps that work everywhere, even without internet. In this session you learn how to build local first applications with Vue 3 and Dexie.js that store data on the device, work offline by default, and sync when connectivity returns. You walk through the architecture decisions that make local first possible, implement reactive IndexedDB queries, and handle the tricky parts like conflict resolution and data migrations. By the end you have a mental model for building apps that put users in control of their data and never show a loading spinner again.

## Speaker

### [Alexander Opalic](https://www.wearedevelopers.com/@alexander-opalic)

Developer at Otto Payments


## Related talks at this congress

- [Future of Mobile AI. What On-Device Intelligence Means for App Developers](https://www.wearedevelopers.com/events/world-congress-2026-europe/sessions/1298-future-of-mobile-ai) — Sasha Denisov
- [Swift, Server-side, Serverless](https://www.wearedevelopers.com/events/world-congress-2026-europe/sessions/1071-swift-server-side) — Sebastien Stormacq
- [Edge AI on iOS: Beyond the Cloud, Designing the Next Generation of Intelligent On-Device Apps](https://www.wearedevelopers.com/events/world-congress-2026-europe/sessions/1256-edge-ai-on-ios) — Precious Osaro
- [Out-of-Order Streaming — The Future of Web Development](https://www.wearedevelopers.com/events/world-congress-2026-europe/sessions/1248-out-of-order) — Julian Burr