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Programming language: JavaScript
License: MIT License
Add another 'Webpack' Package

README

The project is in low maintance now

Use WasmPack instead

Webpack Rust loader

Webpack loader for Rust

Example

add.rs

#[no_mangle]
pub fn add(a: i32, b: i32) -> i32 {
    a + b
}

huge_crate/Cargo.toml

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

huge_crate/src/lib.rs

fn its_magic_number(x: i32) -> bool {
    x == 42
}
#[no_mangle]
pub fn plus_one(x: i32) -> i32 {
    if its_magic_number(x) { 420 } else { x + 1 }
}

main.js

import add from "./add.rs"
import hugeCrate from "./huge_crate/Cargo.toml"

(async () => {
  const add = await add.then(buf => WebAssembly.instantiate(buf))
  const hugeCrate = await hugeCrate.then(buf => WebAssembly.instantiate(buf))

  console.log(add.instance.exports.add(1, 2)) // 3
  console.log(hugeCrate.instance.exports.plus_one(6)) // 7
  console.log(hugeCrate.instance.exports.plus_one(42)) // 420
})()

Features

  • Dont injects WASM to JS bundle, dynamic http fetching .wasm files via file-loader
  • Hot module replacement

Usage

  1. Prepare system
    1. Install nightly Rust: rustup update nightly
    2. Install rustc wasm target: rustup target add wasm32-unknown-unknown --toolchain nightly
    3. Install wasm-gc: cargo install --git https://github.com/alexcrichton/wasm-gc --force
  2. Configure Webpack
    1. Install rust-loader and file-loader: yarn add rust-loader file-loader --dev
    2. Use it in Webpack config: js rules: [ { test: /(\.rs$|Cargo.toml)/, loader: "rust-loader" }, { test: /\.wasm$/, loader: "file-loader", type: "javascript/auto" } ]