React.js从js数组获取数据

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      data: [1, 2, 3, 4, 5]
    };
  }

  render() {
    return (
      <div>
        {this.state.data.map(item => (
          <span key={item}>{item}</span>
        ))}
      </div>
    );
  }
}

class ParentComponent extends React.Component {
  render() {
    const data = [1, 2, 3, 4, 5];
    return <ChildComponent data={data} />;
  }
}

class ChildComponent extends React.Component {
  render() {
    return (
      <div>
        {this.props.data.map(item => (
          <span key={item}>{item}</span>
        ))}
      </div>
    );
  }
}