Webpack配置与优化-优快云博客

本文链接：https://blog.youkuaiyun.com/The_upside_of_down/article/details/103262762

一、webpack基本配置

module.exports = {
  context: path.resolve(__dirname, '../'),
  entry: {
    app: './src/main.js'   
  },
  output: {
    path: config.build.assetsRoot,
    filename: '[name].js',
  },
  resolve: {
    extensions: ['.js', '.vue', '.json'],
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@': resolve('src'),
    }
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: vueLoaderConfig
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        include: [resolve('src'), resolve('test'), resolve('node_modules/webpack-dev-server/client')]
      },
      {
        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('img/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('media/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
        }
      }
    ]
  },
  node: {
    // prevent webpack from injecting useless setImmediate polyfill because Vue
    // source contains it (although only uses it if it's native).
    setImmediate: false,
    // prevent webpack from injecting mocks to Node native modules
    // that does not make sense for the client
    dgram: 'empty',
    fs: 'empty',
    net: 'empty',
    tls: 'empty',
    child_process: 'empty',
  },
  plugins: [
    new webpack.ProvidePlugin({
      $: "jquery",
      jQuery: 'jquery',
    })
  ]
}

二、插件html-webpack-plugin

plugins使用。

module.exports = {
  context:  ,    // 上线环境配置
  entry: {
    main: './src/srcipt/main.js',
    a: './src/scripts.js'
  },
  output: {
    path: './dist/js',
    filename: 'js/[name]-[chunkhash].js'
  },
  plugins: [
    new htmlWebpackPlugin({
      filename: 'index-[hash].html'
      template: 'index.html'  //路径为绝对路径，上线后的环境
      inject: 'head'    //将<script>标签嵌套在<head>标签内
      minify: {        //对html文件进行压缩
           removeComments: true,     // 去掉注释
      }              
    })
  ]
}

通过htmlWebpackPlugin生成多页面应用。

module.exports = {
  context:  ,    // 上线环境配置
  entry: {
    main: './src/srcipt/main.js',
    a: './src/a.js',
    b: './src/b.js'
    c: './src/c.js'
  },
  output: {
    path: './dist/js',
    filename: 'js/[name]-[chunkhash].js'
  },
  plugins: [
    new htmlWebpackPlugin({
      filename: 'a.html'
      template: 'index.html'  //路径为绝对路径，上线后的环境
      inject: 'head'    //将<script>标签嵌套在<head>标签内
      chunks: ['main','a']    // 传参
    }),
      new htmlWebpackPlugin({
      filename: 'b.html'
      template: 'index.html'  //路径为绝对路径，上线后的环境
      inject: 'head'    //将<script>标签嵌套在<head>标签内
      chunks: ['b']    // 传参
      }              
    }),
      new htmlWebpackPlugin({
      filename: 'c.html'
      template: 'index.html'  //路径为绝对路径，上线后的环境
      inject: 'head'    //将<script>标签嵌套在<head>标签内
      excludeChunks: ['a','b']    // 传参除了a,b
    })
  ]
}

三、Loader特性。

module: {
    // 处理资源文件
    loaders: [
      {
        test: /\.js$/,
        loader: 'babel',
        query: {
          presets: ['latest']
        }
      },
      {
        test: /\.css$/,
        loader: 'style-loader!css-loader'
      },
      {
        test: /\.less$/,
        loader: 'style!css!postcss!less'
      },
      {
        test: /\.(png|jpg|svg|gif)$/i,
        loader: 'file-loader'
      }
    ] ,
  },

webpack学习笔记