https://github.com/ianjsikes/rust-wasm-loader

Webpack loader for Rust
https://github.com/ianjsikes/rust-wasm-loader

javascript rust wasm webassembly webpack

Last synced: about 2 months ago
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Webpack loader for Rust

• Host: GitHub
• URL: https://github.com/ianjsikes/rust-wasm-loader
• Owner: ianjsikes
• License: mit
• Fork: true (mrdziuban/rust-emscripten-loader)
• Created: 2017-06-20T04:33:24.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2019-06-20T02:41:59.000Z (over 5 years ago)
• Last Synced: 2024-07-20T04:15:42.799Z (2 months ago)
• Topics: javascript, rust, wasm, webassembly, webpack
• Language: JavaScript
• Homepage: https://www.npmjs.com/package/rust-wasm-loader
• Size: 82 KB
• Stars: 82
• Watchers: 6
• Forks: 17
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Rust WebAssembly loader

[![npm](https://img.shields.io/npm/v/rust-wasm-loader.svg)](https://www.npmjs.com/package/rust-wasm-loader)

## Usage

This is a simple Webpack loader that shells out to cargo to build a Rust project targeting WebAssembly. See [this post](https://www.hellorust.com/setup/wasm-target/) for

more details on using Rust to target the web.

To use it, first install the package:

```bash

$ npm install rust-wasm-loader

```

Configure the loader in your Webpack config:

```js

module.exports = {

  // ...

  module: {

    rules: [

      {

        test: /\.rs$/,

        use: {

          loader: 'rust-wasm-loader',

          options: {

            // Path to your 'build' or 'dist' directory relative to project root

            path: 'build/',

          }

        }

      },

      // ...

    ]

  }

}

```

Note: if you are using `file-loader`, make sure to add `.wasm` to the test field, otherwise the module will not be copied! (e.g. `test: /\.(wasm|jpg|jpeg|png|gif|svg|eot|ttf|woff|woff2)$/i,`).

Make sure you have the `cargo`, `rustc`, and (optionally) `emsdk` binaries somewhere in your `PATH`.  `stdweb` and other Rust libraries require a nightly build, which can be installed from https://rustup.rs/ .

Require and initialize the wasm module:

```js

const wasm = require('./lib.rs')

wasm.then(module => {

  // Use your module here

  console.log(module.doub(21))

})

```

or with async/await:

```js

async function loadwasm() {

  const lib = await require('./lib.rs');

  // Use your module here

  console.log(lib.doub(21));

}

loadwasm();

```

### Configuration

The following options can be added to the Webpack loader query:

| Name | Description | Required | Default |

| ---- | ----------- | -------- | ------- |

| `release` | Whether or not to pass the `--release` flag to cargo | false | false |

| `path` | Path to your webpack output folder relative to project root | true | '' |

| `target` | Allows one to specify `wasm32-unknown-emscripten` as build target | false | 'wasm32-unknown-unknown' |

### Example

Check out the [example](example) directory for a simple Hello World example.

This project is based off of [rust-emscripten-loader](https://github.com/mrdziuban/rust-emscripten-loader)

by [mrdziuban](https://github.com/mrdziuban).