PROSAGA码农传奇-React-如何将道具传递给{this.props.children}

您可以使用React.Children遍历子级，然后使用React.cloneElement使用新的道具（浅合并）克隆每个元素，例如：

```
import React, { Children, isValidElement, cloneElement } from 'react';

const Child = ({ doSomething, value }) => (
  <div onClick={() => doSomething(value)}>Click Me</div>
);

function Parent({ children }) {
  function doSomething(value) {
    console.log('doSomething called by child with value:', value);
  }

render() {
    const childrenWithProps = Children.map(children, child => {
      // Checking isValidElement is the safe way and avoids a TS error too.
      if (isValidElement(child)) {
        return cloneElement(child, { doSomething })
      }

return child;
    });

return <div>{childrenWithProps}</div>
  }
};

ReactDOM.render(
  <Parent>
    <Child value="1" />
    <Child value="2" />
  </Parent>,
  document.getElementById('container')
);
```

称呼孩子为功能

您也可以将道具传递给带有渲染道具的孩子。在这种方法中，子代（可以是children或任何其他prop名称）是一个函数，可以接受您要传递的任何参数并返回子代：

```
const Child = ({ doSomething, value }) => (
  <div onClick={() =>  doSomething(value)}>Click Me</div>
);

function Parent({ children }) {
  function doSomething(value) {
    console.log('doSomething called by child with value:', value);
  }

render() {
    // Note that children is called as a function and we can pass args to it
    return <div>{children(doSomething)}</div>
  }
};

ReactDOM.render(
  <Parent>
    {doSomething => (
      <React.Fragment>
        <Child doSomething={doSomething} value="1" />
        <Child doSomething={doSomething} value="2" />
      </React.Fragment>
    )}
  </Parent>,
  document.getElementById('container')
);
```

如果您愿意，也可以代替<React.Fragment>或简单地<>返回一个数组。