grunt.loadNpmTasks('grunt-webpack');

webpack: {
  someName: {
	// webpack options
	entry: "./client/lib/index.js",
	output: {
		path: "asserts/",
		filename: "[hash].js",
	},

	stats: {
		// Configure the console output
		colors: false,
		modules: true,
		reasons: true
	},
	// stats: false disables the stats output

	storeStatsTo: "xyz", // writes the status to a variable named xyz
	// you may use it later in grunt i.e. <%= xyz.hash %>

	progress: false, // Don't show progress
	// Defaults to true

	failOnError: false, // don't report error to grunt if webpack find errors
	// Use this if webpack errors are tolerable and grunt should continue

	watch: true, // use webpacks watcher
	// You need to keep the grunt process alive

	keepalive: true, // don't finish the grunt task
	// Use this in combination with the watch option

	inline: true,  // embed the webpack-dev-server runtime into the bundle
	// Defaults to false

	hot: true, // adds the HotModuleReplacementPlugin and switch the server to hot mode
	// Use this in combination with the inline option

  },
  anotherName: {...}
}