December 2017
Intermediate to advanced
329 pages
6h 9m
Chinese
Content preview from React学习手册
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170
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第
7
章
const HiddenMessage = Expandable(ShowHideMessage)
这里我们创建了一个
HiddenMessage
组件，当
collapsed
属性值为
true
时，将会使用
“
x
”替换字符串中的每个字母或数字。当
collapsed
的属性值为
false
时，将会显
示这些消息。读者可以尝试在本章前面章节介绍的
HiddenMessages
组件中使用这个
HiddenMessage
组件。
接下来将使用相同的
HOC
创建一个按钮，用于显示和隐藏某个
div
中的内容。在接下
来的示例中，
MenuButton
可以用于创建
PopUpButton
，它是一个可以控制内容显示和
隐藏的组件：
class MenuButton extends Component {
componentWillReceiveProps(nextProps) {
const collapsed =
(nextProps.collapsed && nextProps.collapsed === true) ?
true :
false
this.setState({collapsed})
}
render() {
const {children, collapsed, txt, expandCollapse} = this.props
return (
<div className="pop-button"> ...
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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.