在嵌套组件react js中子组件和父组件之间传递数据

import React from 'react';
import ChildComponent from './ChildComponent';

class ParentComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      data: 'Hello from parent component',
    };
  }

  render() {
    return (
      <div>
        <ChildComponent data={this.state.data} />
      </div>
    );
  }
}

export default ParentComponent;

import React from 'react';

class ChildComponent extends React.Component {
  render() {
    return (
      <div>
        <p>{this.props.data}</p>
      </div>
    );
  }
}

export default ChildComponent;