About the sqlite3 WASM/JS Subproject
WebAssembly, a.k.a. WASM, is a standard defining a low-level
programming language suitable (A) as a target for cross-compilation
from many other languages and (B) for running via a virtual machine in
a browser. Designed with scriptability via JavaScript in mind, it
provides a way to compile C code (among others) to WASM and script it
via JavaScript with relatively little friction despite the vast
differences between JavaScript and C.
https://sqlite.org/wasm/doc/tip/about.md