"Instead of asking a remote server for permission to change a number, your app writes state directly to a local SQLite database running in the browser (via WebAssembly). A sophisticated background engine then handles the hard work of syncing those changes to the cloud and other devices."
"Even though we are writing raw SQL queries, the shuffling of the data is handled for us. Our UI components subscribe to the database, and when the data changes (whether locally from a user click or an inbound sync update from the cloud), the UI updates instantly."
"When you use Spotify, you don't download their entire multi-million song catalog. You just download your list and, even if you are offline, you listen to your music lag-free. This is the same kind of model we are building with local-first data, but with a lot of extra power."
An in-browser SQLite database running via WebAssembly enables local-first data storage. The app writes state directly to the local database instead of requesting remote permission for each change. A background engine synchronizes local updates to the cloud and other devices when connectivity is available. UI components subscribe to the database through reactive SQL, so changes trigger immediate interface updates. Updates can originate from user actions locally or from inbound synchronization from the cloud. This approach supports offline use with responsive interaction and maintains data symmetry between client and backend systems.
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