为什么我的webpack bundle.js和vendor.bundle.js这么大？

ervazu 发表于 Dev

尔瓦祖

我所有的React项目的文件大小通常都非常大（bundle.js为4.87 mb，vendor.bundle.js为2.87 mb）。我不知道为什么这么大。我已经启用了uglifyJS，但这似乎没有太大帮助（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"
  }
}

有谁知道如何解决这个问题？

维尼修斯·维埃拉（Vinicius Vieira）

编辑

我不确定您是在Mac / IO还是Windows上，但是我注意到了两点：

1："deploy": "NODE_ENV=production webpack -p"看起来不正确，在构建用于开发和部署的变量时必须设置该变量，此处您无需设置。

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最小化和部署的示例，您必须稍作调整，但是我想这会为您提供帮助。

您必须首先在comand提示符下为节点设置此环境变量，然后在Windows或Mac的终端中将其打开，然后：

Mac: export NODE_ENV=production

Windows: set NODE_ENV=production

您可以在Windows中回显或在Mac中列出以检查是否已添加变量。

然后在您的webpack.config.js中

    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'),
          ]
};

在您的package.json中，您可以设置以下脚本：

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"
    }

如果您使用的是Mac IOS：如果导出在此处不起作用，请改用set，与Windows和Mac的区别是&&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comand npm run watch来构建开发，并使用npm run deploy来将其构建为最小版本。

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