# ECMAScript 2022 승인. 새로운 기능은 ?

> Clean Markdown view of GeekNews topic #6955. Use the original source for factual precision when an external source URL is present.

## Metadata

- GeekNews HTML: [https://news.hada.io/topic?id=6955](https://news.hada.io/topic?id=6955)
- GeekNews Markdown: [https://news.hada.io/topic/6955.md](https://news.hada.io/topic/6955.md)
- Type: news
- Author: [xguru](https://news.hada.io/@xguru)
- Published: 2022-07-12T09:36:02+09:00
- Updated: 2022-07-12T09:36:02+09:00
- Original source: [velog.io](https://velog.io/@dev_boku/%EB%B2%88%EC%97%AD-Ecma-%EC%9D%B8%ED%84%B0%EB%84%A4%EC%85%94%EB%84%90%EC%97%90%EC%84%9C-ECMAScript-2022%EB%A5%BC-%EC%8A%B9%EC%9D%B8%ED%96%88%EC%8A%B5%EB%8B%88%EB%8B%A4.-%EC%83%88%EB%A1%9C%EC%9A%B4-%EA%B8%B0%EB%8A%A5%EC%9D%80-%EB%AC%B4%EC%97%87%EC%9D%B8%EA%B0%80%EC%9A%94)
- Points: 12
- Comments: 0

## Topic Body

- 클래스의 새로운 멤버  
- in 연산자를 통해 프라이빗 슬롯 확인  
- 모듈에서 최상위(Top-level) await  
- error.cause  
- 인덱싱 가능한 값의 .at() 메서드  
- RegExp match indicies  
- Object.hasOwn(obj, propKey)

## Comments



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