webpack打包分析工具（webpack-bundle-analyzer）安裝

安裝

    npm install --save-dev webpack-bundle-analyzer
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配置（webpack.config.js）

    const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
    plugins: [
    new BundleAnalyzerPlugin(
               {
                  analyzerMode: 'server',
                  analyzerHost: '127.0.0.1',
                  analyzerPort: 8888,
                  reportFilename: 'report.html',
                  defaultSizes: 'parsed',
                  openAnalyzer: true,
                  generateStatsFile: false,
                  statsFilename: 'stats.json',
                  statsOptions: null,
                  logLevel: 'info'
                    }
           ),
    ]
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在package.json新增

    "analyz": "NODE_ENV=production npm_config_report=true npm run build"
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執行

npm run analyz複製程式碼