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我使用 React on Rails 创建了一个站点。它工作得很好，但我没有注意到服务器端渲染已关闭，我需要它来进行 SEO，所以我决定打开它。问题是现在我收到这样的错误：

ERROR in SERVER PRERENDERING
Encountered error: "ReferenceError: window is not defined"

我的webpack.config.js看起来像这样：

/* eslint comma-dangle: ["error",
  {"functions": "never", "arrays": "only-multiline", "objects":
"only-multiline"} ] */

const webpack = require('webpack');
const path = require('path');

const devBuild = process.env.NODE_ENV !== 'production';
const nodeEnv = devBuild ? 'development' : 'production';

const bundles = [
    './app/bundles/Home/startup/registration'
]

const config = {
  entry: [
    'es5-shim/es5-shim',
    'es5-shim/es5-sham',
    'babel-polyfill',
    ...bundles
  ],

  output: {
    filename: 'webpack-bundle.js',
    path: '../app/assets/webpack',
  },

  resolve: {
    extensions: ['', '.js', '.jsx'],
    alias: {
      react: path.resolve('./node_modules/react'),
      'react-dom': path.resolve('./node_modules/react-dom'),
    },
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify(nodeEnv),
      },
    }),
  ],
  module: {
    loaders: [
      {
        test: require.resolve('react'),
        loader: 'imports?shim=es5-shim/es5-shim&sham=es5-shim/es5-sham',
      },
      {
        test: /\.jsx?$/,
        loader: 'babel-loader',
        exclude: /node_modules/,
      },
    ],
  },
};

module.exports = config;

if (devBuild) {
  console.log('Webpack dev build for Rails'); // eslint-disable-line no-console
  module.exports.devtool = 'eval-source-map';
} else {
  config.plugins.push(
    new webpack.optimize.DedupePlugin()
  );
  console.log('Webpack production build for Rails'); // eslint-disable-line no-console
}

我应该怎么做才能修复它？我通读了react_on_railsgithub 上的一个相关问题，但我仍然不知道。

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0 回答 0