This approach is working great. My latest code is here, pointing at the part that allocates space for the array of floats in Rust code: https://github.com/mvolkmann/wasm-bind-demo/blob/707e7c65e516d3534648ff99cedcc161bc94aa37/src/lib.rs#L46.
Could I instead allocate the space in the JS code and get Rust to use that space? I'm thinking this might simplify the code overall if it is possible.
As I understand it, this is fundamentally not possible in the WASM model. While JavaScript can peek inside of the WASM virtual machine, WASM code cannot access the outside world. So any allocation shared between the two domains must originate from inside of WASM.
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