A collection of JS module utilities written in Rust

Usage

The package is published to npm as a WebAssembly module. Install with:

$ npm install fmu

import { init, guessJsSyntax } from 'fmu'

// initialize wasm (MUST call this before any other APIs)
await init()

const code = `exports.foo = 'bar'`
console.log(await guessJsSyntax(code)) // "CJS"

Note: For Vite, you have to pass a custom URL to init(). For example:

import { init } from 'fmu'
import wasmUrl from 'fmu/wasm?url'
await init(wasmUrl)

See examples for usage with different setups.

Development

Follow the official guide to install Rust. Also install wasm-pack to build Rust files into WebAssembly.

# Build wasm for dev (e.g. testing examples)
$ npm run dev

# Build wasm for publishing
$ npm run build

# Run unit and integration tests
$ cargo test

Sponsors

License

MIT