> 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-env-vars-html.md).

# 환경 변수 + HTML 구성

## 1. 환경 변수 구성

환경 변수(Environment Varialbles) 플러그인은 Webpack 패키지에 이미 포함되어 있습니다. `webpack` 모듈을 불러온 후 다음과 같이 플러그인을 구성합니다.

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

```javascript
const wepack = require('webpack')

module.exports = (_env, argv) => {
  const isProd = argv.mode === 'production'
  const isDev = !isProd
  
  return {
    plugins: [
      // 환경 변수 플러그인 인스턴스 생성
      new webpack.EnvironmentPlugin({
        NODE_ENV: isDev ? 'development' : 'production'
      })
    ]
  }
}
```

{% endtab %}
{% endtabs %}

## 2. HTML 구성

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

{% tabs %}
{% tab title="패키지 설치" %}

```bash
npm i html-webpack-plugin -D
```

{% endtab %}
{% endtabs %}

`plugins`에 플러그인을 추가한 후, 옵션을 구성합니다.

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

```javascript
const HtmlWebpackPlugin = require('html-webpack-plugin')

module.exports = (_env, argv) => {
  // ...
  return {
    plugins: [
      // 플러그인 인스턴스 생성
      new HtmlWebpackPlugin({
        template: getAbsolutePath('public/index.html'),
        inject: true
      })
    ]
  }
}
```

{% endtab %}
{% endtabs %}

{% hint style="info" %}
입맛에 맞는 HTML 문서를 동적으로 생성하려면 [HTML 커스텀 템플릿](/webpack/webpack/webpack-plugins/automatic-injection-to-html-document.md#custom-template) 문서를 참고합니다.
{% endhint %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://yamoo9.gitbook.io/webpack/react/create-your-own-react-app/config-env-vars-html.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.