I'm getting a ref error when I try to create a Surface. about react-canvas

I have the same error.

In my app:

1. browserify
2. dependencies react-canvas in package.json

[differui]

Same error =(

[differui]

Error cleared after I use same webpack.config.js as this repo used:

module.exports = {
    cache: true,
    watch: true,

    entry: {
        app: "./app/app.js",
    },

    output: {
        filename: "./dist/app.js"
    },

    module: {
        loaders: [
            {
                test: /\.css$/,
                loader: "style!css"
            },
            {
                test: /\.js$/,
                loader: "jsx!transform/cacheable?envify"
            }
        ],

        postLoaders: [
            {
                loader: "transform?brfs"
            }
        ]
    },

    resolve: {
        root: __dirname,

        extensions: [
            "",
            ".js",
            ".coffee"
        ],

        alias: {
            'react-canvas': 'lib/ReactCanvas.js'
        }
    }
};

I clone ReactCanvas in lib/ at root direction rather than install form npm(obsoleted).