props.children中的响应不能成为无状态组件吗?

问题描述：

我正在尝试在反应中练习渲染道具，但是我得到了

I'm trying to practice render props patter in react but I got error of

this.props.children不是函数

this.props.children is not a function

这是我的代码

import React from 'react';
import { render } from 'react-dom';


const Box = ({color}) => (
  <div>
    this is box, with color of {color}
  </div>
);

class ColoredBox extends React.Component {
  state = { color: 'red' }
  getState() {
    return {
      color: this.state.color
    }
  }
  render() {
    return this.props.children(this.getState())
  }
}

render(<ColoredBox><Box /></ColoredBox>, document.getElementById('root'));

https://codesandbox.io/s/8z0xmk9ojl

答

按照render props模式，您需要将孩子作为函数，因此您确实会编写

Following the render props pattern, you need to have your children as a function, so you would indeed write

import React from 'react';
import { render } from 'react-dom';


const Box = ({color}) => (
  <div>
    this is box, with color of {color}
  </div>
);

class ColoredBox extends React.Component {
  state = { color: 'red' }
  getState() {
    return {
      color: this.state.color
    }
  }
  render() {
    return this.props.children(this.getState())
  }
}

render(<ColoredBox>{(color) => <Box color={color}/>}</ColoredBox>, document.getElementById('root'));

也要明确一点，当像<Box/>

但是您可以使用上面的无状态功能组件，例如

However you could use the above stateless functional component like

<ColoredBox>{Box}</ColoredBox>

它会起作用

演示

Demo

props.children中的响应不能成为无状态组件吗?

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