webpack - 找不到模块 : Error: Cannot resolve module 'react' when I use webpack

Question

非常感谢对此的帮助:我无法使用 webpack 进行构建，我得到了一个简短的错误列表，开头为:

Module not found: Error: Cannot resolve module 'react' in ../client/front_desk.jsx

最后得到一个长列表，如下所示:

Module not found: Error: Cannot resolve 'file' or 'directory' ../node_modules/process/browser.js

这是我的 webpack.config.js:

const webpack = require('webpack');
const commonsPlugin = new webpack.optimize.CommonsChunkPlugin('common.js');

module.exports = {
  entry: {
    front_desk: './front/client/front_desk',
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  output: {
    path: 'front/public/js',
    filename: '[name].js', // Template based on keys in entry above
  },
  module: {
    loaders: [
      {
        test: /\.(jsx|js)?$/,
        loader: 'babel',
        query: {
          presets: ['es2015', 'react'],
        },
      },
    ],
  },
  plugins: [commonsPlugin],
};

还有我的 .babelrc:

{
  "plugins": ["syntax-jsx"],
  "presets": ["react", "es2015"],
}

我的依赖项列表在 package.json 中:

  "dependencies": {
    "aguid": "*",
    "babel-plugin-syntax-jsx": "*",
    "babel-preset-es2015": "*",
    "babel-preset-react": "*",
    "babel-register": "*",
    "bcrypt": "*",
    "eslint": "*",
    "eslint-config-airbnb": "^8.0.0",
    "eslint-plugin-import": "^1.6.1",
    "eslint-plugin-jsx-a11y": "^1.0.4",
    "eslint-plugin-react": "^5.0.1",
    "hapi": "*",
    "hapi-react-views": "^7.0.0",
    "inert": "*",
    "isomorphic-fetch": "*",
    "mailparser": "*",
    "mandrill-api": "*",
    "mongodb": "*",
    "nodemon": "*",
    "react": "^15.0.2",
    "react-dom": "^15.0.2",
    "react-redux": "*",
    "redux": "*",
    "redux-thunk": "*",
    "twilio": "*",
    "vision": "*",
    "webpack-dev-server": "^1.14.1"
  },
  "devDependencies": {
    "babel-core": "*",
    "babel-loader": "*",
    "faucet": "*",
    "jsx-loader": "^0.13.2",
    "nodemon": "*",
    "tape": "*",
    "webpack": "*"
  }

Answer 1

想通了!我首先使用 --display-error-details 运行 webpack，在我看来，默认情况下它应该一直处于打开状态。 webpack --progress --color --watch --display-error-details。

这告诉我，webpack 遇到如此困难的原因是因为我告诉它寻找的扩展有问题:

  resolve: {
    extensions: ['.js', '.jsx'],
  },

会寻找react.js.js和react.js.jsx，而不仅仅是react.js。所以，我必须将其更新为:

  resolve: {
    extensions: ['', '.js', '.jsx'],
  },

这解决了它! =)