VikramTiwari / rust-wasm-web-nodejs-experiment

a quick experiment to use rust based libs in nodejs by converting them to wasm. rust -> wasm -> nodejs and web

Rust with Node.js

Installation

• Install rust using rustup https://www.rust-lang.org/tools/install
• Create a new project using cargo new --lib web
• Install deps for wasm build of rust code

rustup update
rustup target add wasm32-unknown-unknown

Coding

• Add your code in web/src/lib.rs

Build WASM

Use cargo to build rust lib to wasm

• Modify Cargo.toml file and add the following

[package]
...
...

[lib]
crate-type = ["cdylib"]

[dependencies]
...
...

• Run cargo build --target wasm32-unknown-unknown --release
• You can also compile the rust code to wasm using rustc: rustc --target wasm32-unknown-unknown --crate-type=cdylib src/lib.rs -o web.big.wasm
• web.wasm file is in web/target/wasm32-unknown-unknown/release/web.wasm

Using WASM

• For web based usage, look into webwasm dir
• For nodejs based usage, look into nodewasm dir

Note that both projects use native WebAssembly modules for loading web.wasm. You might get better performance with .dylib files but I don't like to deal with node-gyp.