如何在React中创建元素过滤器？

import React, { Component } from 'react';

class ElementFilter extends Component {
  constructor(props) {
    super(props);
    this.state = {
      elements: ['apple', 'banana', 'orange', 'grape'],
      filter: ''
    };
  }

  handleFilterChange = (event) => {
    this.setState({ filter: event.target.value });
  }

  render() {
    const { elements, filter } = this.state;
    const filteredElements = elements.filter(element =>
      element.toLowerCase().includes(filter.toLowerCase())
    );

    return (
      <div>
        <input type="text" value={filter} onChange={this.handleFilterChange} placeholder="Filter elements" />
        <ul>
          {filteredElements.map((element, index) => (
            <li key={index}>{element}</li>
          ))}
        </ul>
      </div>
    );
  }
}

export default ElementFilter;