Servo is a big system written in Rust and doing lots of different things. One of those things is running JS and/or Wasm code in a VM, with that VM doubling-up as a compiler too when appropriate. That VM is called Spidermonkey, and this article is about how it integrates with Servo, which also makes it an article about how to integrate Spidermonkey with any Rust program. Javascript, and Wasm, are n