July 2017
Beginner to intermediate
464 pages
10h 38m
Korean
Content preview from 러닝 자바스크립트: ES6로 제대로 입문하는 모던 자바스크립트 웹 개발
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370
러닝 자바스크립트
사용자의 환경을 컨트롤하지 않는 한 당분간은
ES5
를 사용해야 합니다.
ES6
를 쓸 수 없는건
아닙니다. 트랜스컴파일을 통해
ES6
를
ES5
로 바꾸면 됩니다. 배포와 디버깅 작업이 더 길어지
긴 하지만 진보에 대한 대가라고 해야 할 겁니다.
이 장에서는
2
장에서 설명한 트랜스컴파일러를 사용한다고 가정합니다. 이 장에서 사용하는
예제는 모두 파이어폭스 최신 버전에서 정확히 동작하지만, 여러 브라우저에서 동작하게 하려
면 코드를 트랜스컴파일 해야 합니다.
18.2
문서 객체 모델
DOM
, 즉
문서 객체 모델
은
HTML
문서의 구조를 나타내는 표기법인 동시에 브라우저가
HTML
문서를 조작하는 핵심이기도 합니다.
DOM
은 트리 구조로 표현합니다.
DOM
트리는
노드
node
로 구성됩니다. 루트 노드를 제
외하면 모든 노드에 부모가 있으며, 자식 노드는 있어도 되고 없어도 됩니다. 루트 노드는
문서
document
이며 자식 노드는
<
html
>
요소 하나뿐입니다.
<
html
>
요소에는 자식으로
<
head
>
요소와
<
body
>
요소가 있습니다. [그림
18
-
1
]은
DOM
예제입니다.
DOM
트리의 모든 노드는
Node
클래스의 인스턴스입니다(다음 장의 주제인 노드.
js
와 헛갈리
지 마십시오).
Node
객체에는 트리 구조를 나타내는
parentNode ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.