配置 webpack

在工作目录的根目录中创建文件 webpack.config.js

文件名 ：webpack.config.js

module.exports = {
    entry: __dirname + "/src/index.jsx",
    devtool: "source-map",
    output: {
        path: __dirname + "/build",
        filename: "bundle.js"
    },
    module: {
        loaders: [
            {test: /\.jsx?$/, exclude: /node_modules/, loader: "babel-loader"}
        ]
    }
}