58 lines
1.2 KiB
Markdown
58 lines
1.2 KiB
Markdown
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---
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title: Render Props Component
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localeTitle: 渲染道具组件
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---
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## 渲染道具组件
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渲染道具是一种先进的React模式，但却如此简单！
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### 例
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这是一个关于如何使用渲染道具进行切换功能的示例。
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```jsx
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import React, { PureComponent } from "react";
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class Toggle extends PureComponent {
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state = {
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on: false
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};
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toggle = () => {
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this.setState({
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on: !this.state.on
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});
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};
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render() {
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const { children } = this.props;
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return children({
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on: this.state.on,
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toggle: this.toggle
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});
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}
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}
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export default Toggle;
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```
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这个Toggle组件将返回它的子`state.on`和函数切换。哪个可以用在它的子组件中。
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此切换可以使用如下：
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```jsx
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<Toggle>
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{({ on, toggle }) => (
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<Fragment>
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<button onClick={toggle}>Show / Hide</button>
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{on && <h1>I can be toggled on or off!</h1>}
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</Fragment>
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)}
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</Toggle>
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```
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正如您所看到的，切换功能可以由其子按钮用于切换某些内容。如果on为true，则h1-tag将被渲染，否则不会。
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## 其他资源
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* [反应文档：渲染道具](https://reactjs.org/docs/render-props.html)
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