在input onchange事件中，更新组件内部的数组

import React, { Component } from 'react';

class MyComponent extends Component {
  constructor(props) {
    super(props);
    this.state = {
      myArray: [] // 定义一个空数组
    };
  }

  handleChange = (event) => {
    const value = event.target.value;
    this.setState({
      myArray: [...this.state.myArray, value] // 将新的值添加到数组中
    });
  }

  render() {
    return (
      <div>
        <input type="text" onChange={this.handleChange} />
        <ul>
          {this.state.myArray.map((item, index) => (
            <li key={index}>{item}</li>
          ))}
        </ul>
      </div>
    );
  }
}

export default MyComponent;