zlacker

I recommend trying Javy[0]. Javy allows you to build a WASM file that includes Javy's JS interpreter along with your JS source code. Note that Javy is a heavily sandboxed environment so it doesn't have access to the internet, or npm modules, a desirable feature for running user code.

We're building an IoT Cloud Platform, Fostrom[1] where we're using Javy to power our Actions infrastructure. But instead of compiling each Action's JS code to a Javy WASM module, I figured out a simpler way by creating a single WASM module with our wrapper code (which contains some further isolation and helpful functions), and we provide the user code as an input while executing the single pre-compiled WASM module.

[0] https://github.com/bytecodealliance/javy

[1] https://fostrom.io