You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

29 lines
898 B

---
id: children-undefined-ko-KR
title: 정의되지 않은 this.props.children
layout: tips
Upgrade to Jekyll 3 Full list of changes is at https://jekyllrb.com/docs/upgrading/2-to-3/. The tl;dr of it is: - Relative permalinks were removed, so all the files in the `docs` subdirectory need their permalink to be prefixed with `docs/` - `post` and `page` types were renamed to `posts` and `pages` respectively - `jekyll-paginate`, `pygments` and `redcarpet` are all now optional, so I needed to explicitly add it to the Gemfile. Jekyll now uses `rouge` rather than `pygments` for syntax highlighting, but rouge does not support highlighting individual lines (`hl_lines`) so we need to continue using Pygments. - Layout metadata (eg. `sectionid`) is now on a `layout` variable rather than `page` Tested the following pages and confirmed that they all work: - "Docs" link (getting started page): http://127.0.0.1:4000/react/docs/getting-started.html - Downloads: http://127.0.0.1:4000/react/downloads.html - Tutorial: http://127.0.0.1:4000/react/docs/tutorial.html - A few pages under the "docs" subdirectory, to confirm they're working properly: - http://127.0.0.1:4000/react/docs/addons.html - http://127.0.0.1:4000/react/docs/why-react.html - http://127.0.0.1:4000/react/docs/create-fragment.html - A few tips: - http://127.0.0.1:4000/react/tips/false-in-jsx.html - http://127.0.0.1:4000/react/tips/style-props-value-px.html - Non-English versions of the page: - http://127.0.0.1:4000/react/docs/getting-started-it-IT.html - http://127.0.0.1:4000/react/docs/getting-started-ja-JP.html
9 years ago
permalink: tips/children-undefined-ko-KR.html
prev: expose-component-functions-ko-KR.html
next: use-react-with-other-libraries-ko-KR.html
---
`this.props.children`을 통해 자식 컴포넌트에 접근할 수 없습니다. `this.props.children`은 소유자에 의해 자식이 **전달**되도록 지정합니다:
```js
var App = React.createClass({
componentDidMount: function() {
// 이는 `span`을 참조하지 않습니다!
// 마지막 줄의 `<App></App>` 사이의 정의되지 않은 자식을 참조합니다.
console.log(this.props.children);
},
render: function() {
return <div><span/><span/></div>;
}
});
ReactDOM.render(<App></App>, mountNode);
```
서브 컴포넌트(`span`)에 억세스하려면, [refs](/react/docs/more-about-refs.html)를 넣으세요.