PGlite is a WASM (Webassembly) based TypeScript/JavaScript client library which helps to run PostgreSQL locally in Browser or in NodeJS / Bun. It does not include any dependencies. It is very light weight and it's size is 3 MB Gzipped. It supports many Postgres extensions like pgvector, live queries, bloom, btree, earthdistance, fuzzymatch and lot morebun.

To be clear: this is not Silverlight. This is, in fact, a re-implementation of Silverlight that uses Web Assembly instead of browser plugins to achieve its goals.

C# is usually thought of as a backend, server-side language. But with the Blazor-Web Assembly combo, developers can use it for client-side as well. 

WebAssembly or wasm is a new portable, size- and load-time-efficient format suitable for compilation to the web.