webpack：在生产构建后缺少自定义样式

Question

我已经更新了我的webpack文件。 现在，不会将我的自定义样式应用于主样式包。 没有错误，捆绑中缺少自定义样式的类。 当我使用development模式运行构建时-一切正常，我的样式包含在捆绑包中。 这种情况仅在production版本中发生。

我尝试使用extract-text-webpack-plugin代替mini-css-extract-plugin但是结果是一样的-在产品构建中我的样式丢失了。

我将非常感谢任何帮助。

这是文件：

webpack.config.js

const path = require('path');
const fs = require('fs');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const autoprefixer = require('autoprefixer');
const lessToJs = require('less-vars-to-js');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');

const publicPath = 'public';
const themeVariables = lessToJs(
  fs.readFileSync(path.join(__dirname, './assets/style/ant-theme-vars.less'), 'utf8'),
);

module.exports = (env, options) => {
  const mode = env ? env.mode : options.mode;
  return {
    entry: './assets/app.jsx',
    output: {
      path: path.resolve(__dirname, publicPath),
      filename: 'bundle.js',
    },
    module: {
      rules: [
        {
          test: /\.less$/,
          use: [
            MiniCssExtractPlugin.loader,
            {
              loader: 'css-loader',
            },
            {
              loader: 'postcss-loader',
              options: {
                plugins: [
                  autoprefixer({
                    browsers: 'last 2 version',
                  }),
                ],
              },
            },
            {
              loader: 'less-loader',
              options: {
                javascriptEnabled: true,
                modifyVars: themeVariables,
              },
            },
          ],
        },
        {
          test: /\.s?css$/,
          exclude: [/node_modules/],
          use: [
            MiniCssExtractPlugin.loader,
            {
              loader: 'css-loader',
            },
            {
              loader: 'postcss-loader',
              options: {
                plugins: [
                  autoprefixer({
                    browsers: 'last 2 version',
                  }),
                ],
              },
            },
            {
              loader: 'sass-loader',
            },
          ],
        },
        {
          test: /\.jsx?$/,
          exclude: [/node_modules/],
          loaders: ['babel-loader'],
          resolve: { extensions: ['.js', '.jsx'] },
        },
        {
          test: /\.(png|jpg|jpeg|gif|svg|ico)$/,
          exclude: [/node_modules/],
          use: [
            {
              loader: 'file-loader',
              options: {
                name: 'img/[name].[ext',
              },
            },
            {
              loader: 'image-webpack-loader',
              options: {
                mozjpeg: {
                  progressive: true,
                  quality: 70,
                },
              },
            },
          ],
        },
        {
          test: /\.(otf|ttf|woff|woff2)$/,
          exclude: [/node_modules/],
          loader: 'file-loader',
          options: {
            name: 'fonts/[name].[ext]',
          },
        },
      ],
    },
    plugins: [
      new CleanWebpackPlugin(publicPath, {}),
      new MiniCssExtractPlugin({
        filename: 'bundle.css',
      }),
      new HtmlWebpackPlugin({
        filename: 'index.html',
        template: './assets/www/index.html',
      }),
    ],
    optimization: {
      minimizer: [
        new UglifyJsPlugin({
          cache: true,
          parallel: true,
          uglifyOptions: {
            compress: true,
            mangle: true,
            warnings: false,
            drop_console: true,
            unsafe: true,
          },
          sourceMap: true,
        }),
      ],
    },
    devServer: {
      contentBase: path.join(__dirname),
      compress: true,
      port: 9000,
      publicPath: '/',
      historyApiFallback: true,
    },
    devtool: mode === 'development' ? 'cheap-inline-module-source-map' : '',
  };
};

package.json

{
  "name": "react-templates",
  "version": "1.0.0",
  "description": "",
  "main": "bundle.js",
  "sideEffects": false,
  "scripts": {
    "build": "webpack --progress --mode production",
    "build-dev": "webpack -p --progress --mode development",
    "start": "webpack-dev-server --mode production --open",
    "eslint": "eslint . --ext .js --ext .jsx",
    "stylelint": "stylelint assets/scss",
    "deploy-current-branch-dev": "npm run build-dev && firebase deploy",
    "deploy-dev": "git checkout -- . && git clean -fd && git checkout develop && git remote update && git pull  && npm run build-dev && firebase deploy"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "antd": "3.8.2",
    "autoprefixer": "9.0.1",
    "brace": "0.11.1",
    "clean-webpack-plugin": "0.1.19",
    "extract-text-webpack-plugin": "4.0.0-beta.0",
    "fast-async": "^6.3.8",
    "file-system": "2.2.2",
    "firebase": "5.3.0",
    "history": "4.7.2",
    "html-webpack-plugin": "^3.2.0",
    "less-vars-to-js": "1.3.0",
    "lodash": "^4.17.11",
    "mini-css-extract-plugin": "^0.4.3",
    "moment": "2.22.2",
    "optimize-css-assets-webpack-plugin": "5.0.0",
    "prop-types": "15.6.2",
    "react": "15.6.1",
    "react-ace": "6.1.4",
    "react-copy-to-clipboard": "5.0.1",
    "react-dom": "15.6.1",
    "react-favicon": "0.0.14",
    "react-redux": "5.0.7",
    "react-router": "4.3.1",
    "react-router-dom": "4.3.1",
    "react-sticky": "^6.0.3",
    "redux": "4.0.0",
    "redux-devtools-extension": "2.13.5",
    "redux-logger": "3.0.6",
    "redux-thunk": "2.3.0",
    "uglifyjs-webpack-plugin": "^2.0.1",
    "webpack": "^4.16.1",
    "webpack-merge": "^4.1.4"
  },
  "devDependencies": {
    "@babel/core": "^7.1.2",
    "@babel/plugin-proposal-class-properties": "^7.1.0",
    "@babel/preset-env": "^7.1.0",
    "@babel/preset-react": "^7.0.0",
    "babel-eslint": "8.2.6",
    "babel-loader": "^8.0.4",
    "babel-plugin-import": "^1.9.1",
    "css-loader": "1.0.0",
    "eslint": "4.19.1",
    "eslint-config-airbnb": "17.0.0",
    "eslint-plugin-import": "2.12.0",
    "eslint-plugin-jsx-a11y": "6.0.3",
    "eslint-plugin-react": "7.9.1",
    "file-loader": "^2.0.0",
    "husky": "1.0.0-rc.13",
    "image-webpack-loader": "^4.3.1",
    "less": "3.8.1",
    "less-loader": "4.1.0",
    "node-sass": "4.9.2",
    "postcss-loader": "2.1.6",
    "sass-loader": "7.0.3",
    "style-loader": "0.21.0",
    "stylelint": "9.4.0",
    "stylelint-config-recommended": "2.1.0",
    "webpack-bundle-analyzer": "^3.0.2",
    "webpack-cli": "^3.1.0",
    "webpack-dev-server": "^3.1.5"
  },
  "husky": {
    "hooks": {
      "pre-commit": "npm run eslint && npm run stylelint"
    }
  }
}

.babelrc

{
"presets": [
        "@babel/preset-env",
        "@babel/preset-react"
    ],
    "plugins": [
        "@babel/plugin-proposal-class-properties",
        [
            "import",
            {
                "libraryName": "antd",
                "style": true
            }
        ]
    ]
}

Answer 1

问题是sideEffects: false在我的package.json文件中为sideEffects: false 。

我在Github上发现了一个问题，并且与此有关。

我这样做的主要原因-我想以我的开发模式制作树柄。 它按我的预期工作，但是在生产模式下，我所有的自定义样式都丢失了。 为了解决这个问题，我删除了sideEffects: false 。 因此，我在开发人员模式下迷失了树柄（但认为在开发模式下将其变成一个不错的解决方案）。