Simon Willison’s Weblog

Hosting SQLite databases on Github Pages (via) I've seen the trick of running SQLite compiled to WASM in the browser before, but here it comes with an incredibly clever bonus trick: it uses SQLite's page structure to fetch subsets of the database file via HTTP range requests, which means you can run indexed SQL queries against a 600MB database file while only fetching a few MBs of data over the wire. Absolutely brilliant. Tucked away at the end of the post is another neat trick: making the browser DOM available to SQLite as a virtual table, so you can query and update the DOM of the current page using SQL!