Congrats! I write calculators myself from time to time, but this sounds very impressive :) How was your experience using webassembly? Any good guides that helped you with that part?
It was actually surprisingly seamless with Rust. "wasmpack" pretty much did it all for me. I added some attributes (well, whatever they're called in Rust) to function and struct declaration to show that bindings should be generated for these things, and from that wasmpack could generate JavaScript bindings! Unfortunately I was slightly limited by some libraries not working with WebAssembly, but I got around that fairly easily.
