> For the complete documentation index, see [llms.txt](https://yamoo9.gitbook.io/webpack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yamoo9.gitbook.io/webpack/react/create-your-own-react-app/config-build-optimization.md).

# 빌드 최적화 구성

## 1. CssMinimizerWebpackPlugin 설치

[css-minimizer-webpack-plugin](https://www.npmjs.com/package/css-minimizer-webpack-plugin) 패키지를 프로젝트에 설치합니다.

{% tabs %}
{% tab title="패키지 설치" %}

```bash
npm i css-minimizer-webpack-plugin -D
```

{% endtab %}
{% endtabs %}

## 2. 플러그인 구성

`optimization` 최적화 구성 항목을 추가한 후,  CssMinimizerWebpackPlugin 플러그인, [splitChunks](https://webpack.js.org/plugins/split-chunks-plugin/#optimizationsplitchunks) 옵션을 다음과 같이 설정합니다.

{% tabs %}
{% tab title="webpack.config.js" %}

```javascript
const os = require('os')
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin')
// ...
  
module.exports = (_env, argv) => {
  // ...
  return {
    optimization: {
      minimize: true,
      minimizer: [
        new CssMinimizerPlugin({
          parallel: os.cpus().length - 1
        }),
      ],
    },
    splitChunks: {
      chunks: 'all',
      minSize: 0,
      minRemainingSize: 0,
      maxSize: 0,
      minChunks: 1,
      maxAsyncRequests: 30,
      maxInitialRequests: 20,
      enforceSizeThreshold: 50000,
      cacheGroups: {
        defaultVendors: {
          test: /[\\/]node_modules[\\/]/,
          priority: -10,
          reuseExistingChunk: true,
        },
        default: {
          minChunks: 2,
          priority: -10,
          reuseExistingChunk: true,
        },
      },
    },
  }
}
```

{% endtab %}
{% endtabs %}


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