Question

我的所有React项目的文件大小都非常大（bundle.js是4.87 mb，vendor.bundle.js是2,87 mb）。我不知道为什么这么大。我已经有了uglifyJS，但这似乎没什么帮助（5.09> 4.87mb和2.9＆gt; 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？

Answer 1

我强烈建议您使用Webpack Bundle Analyzer来缩小捆绑包（https://github.com/th0r/webpack-bundle-analyzer）。你可以看到是什么让你的捆绑如此之大。您可能还使用了所有firebase，lodash和jquery。除了使用webpack生产插件之外，请尝试使用忽略您不使用的内容并仅导入您需要的内容，如下所示：在webpack插件中：

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

在您的导入中：

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

对于lodash，只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'

您也可以创建jquery自定义构建。

Answer 2

修改

我不确定你是使用Mac / IO还是Windows，但我注意到了两件事：

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

2：您必须先在终端/命令提示符上设置它。

以下是webpack缩小和部署的示例，您必须稍微调整一下，但我希望这可以帮助您。

您必须首先在命令提示符下为节点设置此环境变量，在Windows中打开它或在mac中终端：

Mac: export NODE_ENV=production Windows: set NODE_ENV=production

您可以在窗口中回显或在mac中列出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package.json中，您可以设置以下脚本：

如果你在Windows上：

"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" }

如果您使用的是Mac IOS：如果导出在这里不起作用，则使用set，与windows和mac的区别在于＆amp;＆amp;。
之后的空格。
"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，npm运行deploy以在缩小版本中生成它。

Answer 3

我有一个只有React / React Dom和Hello Word React组件的repo设置。 vendor.js文件是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NODE ENV

"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"
  },

Answer 4

你能尝试添加吗？ devtool: 'cheap-module-source-map', 在config？

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

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

Answer 5

将NODE_ENV设置为'production'以生成版本，并通过Uglify运行它 - 这可以消除许多额外的冗长，控制台日志记录等。确保在通过webpack构建时设置该环境变量（例如，在命令行中使用NODE_ENV=production webpack）。

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

5 个答案: