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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295
14
장
비동기적 프로그래밍
다 호출하며
clearInterval
을 사용할 때까지 멈추지 않습니다. 다음 예제는 분이 넘어가거나
10
회째가 될 때까지
5
초마다 콜백을 실행합니다.
const
start
=
new
Date
();
let
i
=
0
;
const
intervalId
=
setInterval
(
function
() {
let
now
=
new
Date
();
if
(
now
.
getMinutes
() ! = =
start
.
getMinutes
()
||
++
i
>
10
)
return
clearInterval
(
intervalId
);
console
.
log
(`${
i
}: ${
now
}`);
},
5
*
1000
);
이 예제를 보면
setInterval
이
ID
를 반환한다는 사실을 알 수 있습니다. 이
ID
를 써서 실행을
멈출 수 있습니다.
clearInterval
은
setInterval
이 반환하는
ID
를 받아 타임아웃을 멈춥니다.
setTimeout
,
setInterval
,
clearInterval
은 모두 전역 객체(브라우저에서는
window
, 노
드에서는
global
)에 정의되어 있습니다.
14.2.2
스코프와 비동기적 실행
비동기적 실행에서 혼란스럽고 에러도 자주 일어나는 부분은 스코프와 클로저가 비동기적 실
행에 영향을 미치는 부분입니다. 함수를 호출하면 항상 클로저가 만들어집니다. ...
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and much more.
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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.