在react中按2个键过滤列表

import React, { Component } from 'react';

class FilteredList extends Component {
  constructor(props) {
    super(props);
    this.state = {
      listData: ['Apple', 'Banana', 'Cherry', 'Durian', 'Elderberry'],
      filteredData: [],
      pressedKeys: [],
    };
  }

  componentDidMount() {
    document.addEventListener('keydown', this.handleKeyDown);
  }

  componentWillUnmount() {
    document.removeEventListener('keydown', this.handleKeyDown);
  }

  handleKeyDown = (event) => {
    const { pressedKeys, listData } = this.state;
    const { key } = event;

    if (/[0-9]/.test(key)) {
      const updatedKeys = [...pressedKeys, key];

      if (updatedKeys.length === 2) {
        const filteredData = listData.filter((item) =>
          item.toLowerCase().includes(updatedKeys.join('').toLowerCase())
        );

        this.setState({ filteredData });
      }

      this.setState({ pressedKeys: updatedKeys });
    }
  };

  render() {
    const { filteredData } = this.state;

    return (
      <div>
        <input type="text" placeholder="Press 2 keys to filter" />
        <ul>
          {filteredData.map((item) => (
            <li key={item}>{item}</li>
          ))}
        </ul>
      </div>
    );
  }
}

export default FilteredList;