> For the complete documentation index, see [llms.txt](https://yamoo9.gitbook.io/typescript/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/typescript/classes/prop-acc-mod.md).

# 속성 with 접근 제어자

## 접근 제어 속성 설정 <a href="#setting-acc-mod-properties" id="setting-acc-mod-properties"></a>

TypeScript의 클래스 문법은 ES6의 기능을 포함하면서 보다 강력한 기능을 제공합니다. **접근 제어자(access modifiers)를 통해 접근 가능한 범위를 설정**할 수 있고, **각 속성에 데이터 타입을 지정**할 수 있습니다.

```typescript
class Book {

  // 제목
  // public: 클래스 외부에서 접근 가능
  public title:string;

  // 저자
  // public은 기본 값으로 생략 가능합니다.
  author:string;

  // 제조 공장
  // private: Book 클래스 내부에서만 접근 가능
  private _manufacturing_plant:string;

  // 종이 유형
  // protected: Book 클래스를 포함한 서브 클래스에서만 접근 가능
  protected paper_type:string;

  // constructor() 매개변수 앞에
  // public, private, protected를 사용하면
  // Book 클래스의 타입(type)을 별도 선언하지 않아도 됩니다.
  constructor(title:string, author:string, public pages:number) {
    this.title = title;
    this.author = author;
    this.pages = pages;
  }

}

/* 인스턴스 생성 ------------------------------------------------ */

let indRevo = new Book('한 권으로 정리하는 4차 산업혁명', '최진기', 367);
console.log(indRevo); // Book {}
```

## 실습 <a href="#practice" id="practice"></a>

{% embed url="<https://stackblitz.com/edit/ts-access-modifiers-props?embed=1&file=index.ts&hideExplorer=0&hideNavigation=1&view=editor>" %}

## 참고 <a href="#reference" id="reference"></a>

{% embed url="<https://www.typescriptlang.org/docs/handbook/classes.html#public-private-and-protected-modifiers>" %}
TypeScript 클래스 접근 제어자
{% endembed %}


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