如何在React中获取map函数中的最后一项

import React, { Component } from 'react';

class MyComponent extends Component {
  constructor(props) {
    super(props);
    this.state = {
      data: ['item1', 'item2', 'item3', 'item4', 'item5'],
      lastItem: ''
    };
  }

  componentDidMount() {
    const lastItem = this.state.data[this.state.data.length - 1];
    this.setState({ lastItem });
  }

  render() {
    return (
      <div>
        {this.state.data.map((item, index) => {
          if (index === this.state.data.length - 1) {
            return <div key={index}>{item}</div>;
          }
          return null;
        })}
        <div>Last Item: {this.state.lastItem}</div>
      </div>
    );
  }
}

export default MyComponent;