我正在尝试在我的Material UI样式对象中使用计算属性，但是出现了意外的令牌错误。

下面是代码段，错误和babel-webpack配置。

const useStyles = makeStyles(theme => {
  root: {
    [desktop]: {
      width: "80%",}
  }
});

//webpack.config.babel.js
...

const config = {
  entry: ['@babel/polyfill','./src/components/index.js'],resolve: {
    extensions: ['.js','.jsx','.ts','.tsx'],},devserver: {
    host: '0.0.0.0',historyApiFallback: {
      index: 'index.dev.html',output: {
    path: path.resolve(__dirname,'build'),filename: 'main.js',chunkFilename: '[name].js',publicPath: '/build/',optimization: {
    minimizer: [
      new UglifyJsPlugin({
        cache: true,parallel: true,sourceMap: true,extractComments: true,}),new OptimizeCSSAssetsplugin({}),],splitChunks: {
      cacheGroups: {
        default: false,vendors: {
          // name of the chunk
          name: 'vendor',// sync + async chunks
          chunks: 'all',// import file path containing node_modules
          test: /node_modules/,priority: 20,styles: {
          name: 'styles',test: /\.css$/,chunks: "all",enforce: true,common: {
          name: 'common',minChunks: 2,chunks: 'all',priority: 10,reuseExistingChunk: true,module: {
    rules: [
      {
        test: /\.(js|ts)x?$/,exclude: /node_modules/,loader: 'babel-loader',options: {
          presets: [
            '@babel/typescript',"@babel/preset-env",'@babel/preset-react','@babel/preset-flow',plugins: [
            '@babel/plugin-transform-runtime','@babel/plugin-proposal-object-rest-spread',['@babel/plugin-proposal-decorators',{legacy: true}],['@babel/plugin-proposal-class-properties',{loose: true}],['@babel/plugin-transform-computed-properties',{
        test: /\.s?[ac]ss$/,use: [
          devMode ? 'style-loader' : MiniCssExtractPlugin.loader,'css-loader','sass-loader',node: {
    fs: 'empty',// First array is dev only,second is production
  plugins: devMode 
  ? [
  ] : [
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production'),new MiniCssExtractPlugin({
      filename: '[name].css'
    }),};

// Exports
module.exports = config;

  

at Object.raise（/node_modules/@babel/parser/lib/index.js:6931:17）
  在Object.unexpected（/node_modules/@babel/parser/lib/index.js:8324:16）
  在Object.semicolon（/node_modules/@babel/parser/lib/index.js:8306:40）
  在Object.parseExpressionStatement（/node_modules/@babel/parser/lib/index.js:11147:10）
  在Object.parseExpressionStatement（/node_modules/@babel/parser/lib/index.js:2072:18）
  at Object.parseStatementContent（/node_modules/@babel/parser/lib/index.js:10746:19）
  在Object.parseStatement（/node_modules/@babel/parser/lib/index.js:10612:17）
  在Object.parseStatement（/node_modules/@babel/parser/lib/index.js:2045:26）
  在Object.parseBlockOrModuleBlockBody（/node_modules/@babel/parser/lib/index.js:11188:25）
  在Object.parseBlockBody（/node_modules/@babel/parser/lib/index.js:11175:10）
  在Object.parseBlock（/node_modules/@babel/parser/lib/index.js:11159:10）
  at Object.parseStatementContent（/node_modules/@babel/parser/lib/index.js:10688:21）
  在Object.parseStatement（/node_modules/@babel/parser/lib/index.js:10612:17）
  在Object.parseStatement（/node_modules/@babel/parser/lib/index.js:2045:26）
  在Object.parseLabeledStatement（/node_modules/@babel/parser/lib/index.js:11139:22）
  在Object.parseStatementContent（/node_modules/@babel/parser/lib/index.js:10744:19）