I would like to rectify that LLRT is mostly community contributed and one guy from AWS (Hi Richard!). There are many businesses using LLRT modules (I worked a lot on making it modular) and rquickjs.

I am a maintainer of both and I wrote a couple of modules myself. There is no better JS runtime for Rust IMO, it is based on quickjs-ng (a fork of quickjs initially due to quickjs inactivity but not both projects are active and have diverged) with a lot of the major Node/WinterJS APIs.