为什么我的 webpack bundle.js 和 vendor.bundle.js 如此之大?

IT技术 javascript build reactjs webpack
2021-03-26 09:43:57

我所有的 React 项目的文件大小都非常大(bundle.js 为 4.87 mb,vendor.bundle.js 为 2.87 mb)。我不知道为什么它这么大。我已经打开了 uglifyJS,但这似乎没有多大帮助(5.09 > 4.87mb 和 2.9 > 2.87mb)

var webpack = require('webpack');
var ExtractTextPlugin = require("extract-text-webpack-plugin");

require('es6-promise').polyfill();

var config = {
  entry: {
    app: [
      './src/entry.jsx'
    ],
    vendor: [
      'react',
      'lodash',
      'superagent'
    ]
  },
  output: {
    path: './build',
    filename: "bundle.js"
  },
  eslint: {
    configFile: './.eslintrc'
  },
  devtool: 'eval-source-map',
  module: {
    loaders: [
      { test: /\.(js|jsx)$/, loaders: ['react-hot', 'babel?experimental'], exclude: /node_modules/},
      { test: /\.(js|jsx)$/, loader: "eslint-loader", exclude: /node_modules/},
      { test: /\.json$/, loader: 'json' },
      { test: /\.yml$/, loader: 'json!yaml' },
      { test: /\.scss$/, loader: 'style!css!sass' },
      { test: /\.(png|woff|woff2|eot|ttf|svg)$/, loader: 'url-loader?limit=100000' }
    ]
  },
  plugins: [
    new webpack.DefinePlugin({'process.env': {'NODE_ENV': JSON.stringify('production')}}),
    new webpack.optimize.CommonsChunkPlugin("vendor", "vendor.bundle.js"),
    new webpack.optimize.UglifyJsPlugin({minimize: true}),
    new webpack.NoErrorsPlugin()
  ]
};

module.exports = config;

我的 package.json

{
  "license": "MIT",
  "engines": {
    "iojs": ">= 1.6.2"
  },
  "scripts": {
    "create:index": "mustang -t index.tmpl -i config.json -o build/index.html",
    "predev": "mkdir -p build/ && npm run create:index",
    "dev": "webpack-dev-server --host 0.0.0.0 --hot --progress --colors --content-base build",
    "backend": "NODE_ENV=production node server/server.js",
    "backend:dev": "DEBUG=tinderlicht node server/server.js",
    "predeploy": "mkdir -p build/ && npm run create:index",
    "deploy": "NODE_ENV=production webpack -p",
    "test": "node webpack-mocha.config.js"
  },
  "devDependencies": {
    "autoprefixer-loader": "^3.2.0",
    "axios": "^0.7.0",
    "babel": "^5.8.23",
    "babel-core": "^5.8.25",
    "babel-eslint": "^4.1.3",
    "babel-loader": "^5.3.2",
    "bluebird": "^2.10.2",
    "css-loader": "^0.19.0",
    "es6-collections": "^0.5.1",
    "es6-promise": "^3.0.2",
    "eslint": "^1.6.0",
    "eslint-loader": "^1.1.0",
    "eslint-plugin-react": "^3.5.1",
    "extract-text-webpack-plugin": "^0.8.2",
    "file-loader": "^0.8.1",
    "firebase": "^2.3.1",
    "fireproof": "^3.0.3",
    "jquery": "^2.2.0",
    "json-loader": "^0.5.1",
    "jsonld": "^0.4.2",
    "jsx-loader": "^0.13.2",
    "lodash": "^3.3.0",
    "mustang": "^0.1.3",
    "node-sass": "^3.3.3",
    "react": "^0.14.0",
    "react-dom": "^0.14.0",
    "react-hot-loader": "^1.1.5",
    "sass-loader": "3.0.0",
    "style-loader": "^0.12.4",
    "superagent": "^1.4.0",
    "url-loader": "^0.5.5",
    "webpack": "^1.5.3",
    "webpack-dev-server": "^1.7.0"
  },
  "dependencies": {
    "body-parser": "^1.15.0",
    "cors": "^2.7.1",
    "debug": "^2.2.0",
    "express": "^4.13.4",
    "mustache": "^2.2.1",
    "nodemailer": "^2.1.0",
    "nodemailer-sendmail-transport": "^1.0.0",
    "react-radio-group": "^2.2.0",
    "uglifyjs": "^2.4.10"
  }
}

有没有人知道如何解决这个问题?

5个回答

我强烈建议使用 Webpack Bundle Analyzer 使您的包更小(https://github.com/th0r/webpack-bundle-analyzer)。您可以看到是什么使您的捆绑包如此庞大。您可能还使用了所有 firebase、lodash 和 jquery。除了使用 webpack 生产插件之外,尝试使用忽略你没有使用的任何东西并只导入你需要的东西:在 webpack 插件中:

    new webpack.IgnorePlugin(/^\.\/auth$/, /firebase$/),
    new webpack.IgnorePlugin(/^\.\/storage$/, /firebase$/),
    new webpack.IgnorePlugin(/^\.\/messaging$/, /firebase$/),

在您的进口:

 const Firebase: any = require('firebase/app');  require('firebase/database');

对于 lodash,仅导入您需要的内容或进行自定义构建(https://lodash.com/custom-builds):

import find from 'lodash/find' 

您还可以创建 jquery 自定义构建。

编辑

我不确定您使用的是 Mac/IO 还是 Windows,但我注意到两件事:

1:"deploy": "NODE_ENV=production webpack -p"不正确,您必须在为开发和部署构建变量时设置变量,在这里您没有设置它。

2:您必须事先在终端/命令提示符下进行设置。

这里有一个 webpack 缩小和部署的例子,你必须适应一点,但我认为这应该对你有所帮助。

您必须首先在命令提示符下为节点设置此环境变量,在 Windows 或 Mac 终端中打开它,然后:

Mac: export NODE_ENV=production

Windows: set NODE_ENV=production

您可以在 windows 中 echo 或在 mac 中 list 以检查是否已添加变量。

然后在你的 webpack.config.js

    var PROD = process.env.NODE_ENV == 'production';
    var config = {
      entry: {
            app: [
          './src/entry.jsx'
        ],
        vendor: [
          'react',
          'lodash',
          'superagent'
        ],
         output: {
           path: './build',
           filename: PROD ? "bundle.min.js" : "bundle.js"
         },
         plugins: PROD ? [
              new webpack.optimize.UglifyJsPlugin({minimize: true}),
              new webpack.optimize.CommonsChunkPlugin('vendor', 'vendor.min.js'),
          ]:[
            new webpack.optimize.CommonsChunkPlugin('vendor', 'vendor.js'),
          ]
};

在你的 package.json 你可以设置这个脚本:

如果您使用的是 Windows:

"scripts": {
         "dev": "set NODE_ENV=development&&webpack-dev-server --host 0.0.0.0 --hot --progress --colors --content-base build",
        "deploy": "set NODE_ENV=production&&webpack -p"
    }

如果你使用的是 Mac IOS:如果这里导出不起作用,则使用 set 代替,windows 和 mac 的不同之处在于 && 后面的空格。

"scripts": {
         "dev": "export NODE_ENV=development&& webpack-dev-server --host 0.0.0.0 --hot --progress --colors --content-base build",
        "deploy": "export NODE_ENV=production&& webpack -p"
    }

使用命令 npm run watch 在开发中构建,使用 npm run deploy 在缩小版本中构建用于生产。

NODE_ENV=production webpack -p 确实设置了环境变量。
2021-06-11 09:43:57

我有一个只有 React / React Dom 和一个 Hello Word React 组件的 repo 设置。vendor.js 文件为 189 KB。

https://github.com/timarney/react-setup

var path = require('path')
var webpack = require('webpack')

var config = {
  entry: {
    app: path.resolve(__dirname, './src/main.js'),
    vendors: ['react']
  },
  output: {
    path: './src',
    filename: 'bundle.js'
  },
  devServer: {
    inline: true,
    contentBase: './src',
    port: 3000
  },
  module: {
    loaders: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel'
      }
    ]
  },
  plugins: [
    new webpack.optimize.OccurenceOrderPlugin(true),
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.UglifyJsPlugin({
      output: {
        comments: false
      },
      compress: {
        warnings: false,
        screw_ie8: true
      }
    }),
    new webpack.optimize.CommonsChunkPlugin('vendors', 'vendors.js')
  ]
}

if (process.env.NODE_ENV === 'production') {
  config.output.path = path.join(__dirname, 'dist/')
}

module.exports = config

注意:我正在通过 NPM 脚本设置节点环境

"scripts": {
    "start": "webpack-dev-server",
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "NODE_ENV=production webpack -p && cp src/index.html dist/index.html"
  },
如果有人使用 OccurenceOrderPlugin。确保名称已更新,以便使用 OccurrenceOrderPlugin。
2021-06-12 09:43:57

你能试试把这个加 devtool: 'cheap-module-source-map', 进去config吗?

 var config = {
     devtool: 'cheap-module-source-map',
     entry: {
 ....

http://webpack.github.io/docs/configuration.html#devtool

react希望你来一套NODE_ENV'production'生产构建,并通过丑化运行它-这摆脱了很多额外的冗长,控制台日志记录等的确保你通过的WebPack建筑(如设置环境变量NODE_ENV=production webpack在命令行)。