> 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/ts-vs-es6/arrow-function.md).

# 화살표 함수

ES6부터 **식(Expression)에 한해 화살표 함수식을 활용**할 수 있습니다. TypeScript 또한 화살표 함수식을 사용할 수 있고, 더 나아가 매개변수, 리턴 타입을 명시적으로 선언해 컴파일 과정에서 타입 검사를 수행해 사전에 문제를 방지할 수 있습니다.

**작성 코드:**

{% code title="TypeScript" %}

```typescript
let corsURL = (url:string): string => `https://crossorigin.me/${url}`;

corsURL('http://yamoo9.herokuapp.com/rest/ediya-menu');
```

{% endcode %}

**컴파일 코드:**

{% code title="JavaScript" %}

```javascript
var corsURL = function (url) {
  return "https://crossorigin.me/" + url;
};

corsURL('http://yamoo9.herokuapp.com/rest/ediya-menu');
```

{% endcode %}

{% embed url="<https://slides.com/yamoo9/es6#/1>" %}


---

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