webpack - 'mode' 选项没有被设置，webpack 将回退到 'production' 这个值。字段 'browser' 不包含有效的别名配置

问题描述

项目目录结构。

下面是webpack配置文件。

webpack.config.client.js

const path = require('path');
const webpack = require('webpack');
const CURRENT_WORKING_DIR = process.cwd();

const config = {
  name: 'browser',
  mode: 'development',
  // mode: 'production',
  devtool: 'eval-source-map',
  entry: [
    'webpack-hot-middleware/client?reload=true',
    path.join(CURRENT_WORKING_DIR, 'client/main.js'),
  ],
  output: {
    path: path.join(CURRENT_WORKING_DIR, '/dist'),
    filename: 'bundle.js',
    publicPath: '/dist/',
  },
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: ['babel-loader'],
      },
      // To bundle image assets so that other JS code can also access
      // and load it other than the component in which it was imported into.
      {
        test: /\.(ttf|eot|svg|gif|jpg|png)(\?[\s\S]+)?$/,
        use: 'file-loader',
      },
    ],
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoEmitOnErrorsPlugin(),
  ],
  resolve: {
    alias: {
      'react-dom': '@hot-loader/react-dom',
    },
  },
};

module.exports = config;

webpack.config.server.js

const path = require('path');
const nodeExternals = require('webpack-node-externals');
const CURRENT_WORKING_DIR = process.cwd();

const config = {
  name: 'server',
  entry: [path.join(CURRENT_WORKING_DIR, './server/server.js')],
  target: 'node',
  output: {
    path: path.join(CURRENT_WORKING_DIR, '/dist/'),
    filename: 'server.generated.js',
    publicPath: '/dist/',
    libraryTarget: 'commonjs2',
  },
  externals: [nodeExternals()],
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: ['babel-loader'],
      },
      // To bundle image assets so that other JS code can also access
      // and load it other than the component in which it was imported into.
      {
        test: /\.(ttf|eot|svg|gif|jpg|png)(\?[\s\S]+)?$/,
        use: 'file-loader',
      },
    ],
  },
};

module.exports = config;

webpack.client.production.js

// const path = require('path');
// const CURRENT_WORKING_DIR = process.cwd();

// const config = {
//   mode: 'production',
//   entry: [path.join(CURRENT_WORKING_DIR, 'client/main.js')],
//   output: {
//     path: path.join(CURRENT_WORKING_DIR, '/dist'),
//     filename: 'bundle.js',
//     publicPath: '/dist/',
//   },
//   module: {
//     rules: [
//       {
//         test: /\.jsx?$/,
//         exclude: /node_modules/,
//         use: ['babel-loader'],
//       },
//       // To bundle image assests so that other JS code can also access
//       // and load it other than the component in which it was imported into.
//       {
//         test: /\.(ttf|eot|svg|gif|jpg|png)(\?[\s\S]+)?$/,
//         use: 'file-loader',
//       },
//     ],
//   },
// };

// module.exports = config;

当我尝试yarn build时，我收到以下错误。

 WARNING in configuration
    The 'mode' option has not been set, webpack will fallback to 'production' for this value.
    Set 'mode' option to 'development' or 'production' to enable defaults for each environment.
    You can also set it to 'none' to disable any default behavior. Learn more: https://webpack.js.org/configuration/mode/

    ERROR in main
    Module not found: Error: Can't resolve './src' in '/home/prithvi/Desktop/socialize'
    resolve './src' in '/home/prithvi/Desktop/socialize'
      using description file: /home/prithvi/Desktop/socialize/package.json (relative path: .)
        Field 'browser' doesn't contain a valid alias configuration
        using description file: /home/prithvi/Desktop/socialize/package.json (relative path: ./src)
          no extension
            Field 'browser' doesn't contain a valid alias configuration
            /home/prithvi/Desktop/socialize/src doesn't exist
          .js
            Field 'browser' doesn't contain a valid alias configuration
            /home/prithvi/Desktop/socialize/src.js doesn't exist
          .json
            Field 'browser' doesn't contain a valid alias configuration
            /home/prithvi/Desktop/socialize/src.json doesn't exist
          .wasm
            Field 'browser' doesn't contain a valid alias configuration
            /home/prithvi/Desktop/socialize/src.wasm doesn't exist
          as directory
            /home/prithvi/Desktop/socialize/src doesn't exist

    webpack 5.31.0 compiled with 1 error and 1 warning in 256 ms
    error Command failed with exit code 1.

以下是 package.json 文件中的脚本配置和依赖项。

"main": "./dist/server.generated.js",
"scripts": {
    "development": "nodemon",
    "build": "webpack --config webpack.config.client.production.js && webpack --mode=production --config webpack.config.server.js",
    "start": "NODE_ENV=production node ./dist/server.generated.js"
},
"dependencies": {
    "@hot-loader/react-dom": "^17.0.1",
    "@material-ui/core": "^4.11.3",
    "@material-ui/icons": "^4.11.2",
    "compression": "^1.7.4",
    "cookie-parser": "^1.4.5",
    "cors": "^2.8.5",
    "express": "^4.17.1",
    "express-jwt": "^6.0.0",
    "helmet": "^4.4.1",
    "jshint": "^2.12.0",
    "jsonwebtoken": "^8.5.1",
    "loadash": "^1.0.0",
    "mongodb": "^3.6.4",
    "mongoose": "^5.12.0",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-hot-loader": "^4.13.0",
    "react-router": "^5.2.0",
    "react-router-dom": "^5.2.0"
  },
"devDependencies": {
    "@babel/core": "^7.13.10",
    "@babel/preset-env": "^7.13.10",
    "@babel/preset-react": "^7.13.13",
    "babel-loader": "^8.2.2",
    "file-loader": "^6.2.0",
    "nodemon": "^2.0.7",
    "webpack": "^5.24.4",
    "webpack-cli": "^4.5.0",
    "webpack-dev-middleware": "^4.1.0",
    "webpack-hot-middleware": "^2.25.0",
    "webpack-node-externals": "^2.5.2"
}

标签： webpackwebpack-dev-serverpackage.jsonwebpack-4nodemon

webpack - 'mode' 选项没有被设置，webpack 将回退到 'production' 这个值。字段 'browser' 不包含有效的别名配置

问题描述

解决方案

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