wasm-pack-watcher-plugin v1.0.4

Usage

$ yarn add -D wasm-pack-watcher-plugin

// webpack.config.js
// ...
const WasmPackWatcherPlugin = require('wasm-pack-watcher-plugin')

// ...

module.exports = {
	// ...
	plugins: [
		// ...
		new WasmPackWatcherPlugin({
			sourceRoot: path.resolve(__dirname, 'rs'),    // default: __dirname/src
			crateRoot: path.resolve(__dirname),           // default: __dirname
			mode: "release"                               // default: release
		})
	]
}

The plugin will watch ./rs for file changes, and execute wasm-pack build --release in ./.

Please ensure wasm-pack is in your $PATH.