在react本机中获取平面列表的顶级索引的方法

import React, { Component } from 'react';

class FlatList extends Component {
  constructor(props) {
    super(props);
    this.state = {
      flatList: ['item1', 'item2', 'item3'] // 平面列表的数据
    };
  }

  handleClick = (item) => {
    const index = this.state.flatList.indexOf(item);
    console.log('顶级索引：', index);
  }

  render() {
    return (
      <div>
        {this.state.flatList.map((item, index) => (
          <div key={index} onClick={() => this.handleClick(item)}>
            {item}
          </div>
        ))}
      </div>
    );
  }
}

export default FlatList;