react将对象从数组列表推送到数组

const array1 = [1, 2, 3];
const array2 = [4, 5, 6];

array1.push(...array2);

console.log(array1); // [1, 2, 3, 4, 5, 6]

const array1 = [1, 2, 3];
const array2 = [4, 5, 6];

const newArray = [...array1, ...array2];

console.log(newArray); // [1, 2, 3, 4, 5, 6]

import React, { Component } from 'react';

class MyComponent extends Component {
  constructor(props) {
    super(props);
    this.state = {
      array1: [1, 2, 3],
      array2: [4, 5, 6]
    };
  }

  handleClick = () => {
    const { array1, array2 } = this.state;
    const newArray = [...array1, ...array2];
    this.setState({ array1: newArray });
  }

  render() {
    const { array1 } = this.state;

    return (
      <div>
        <button onClick={this.handleClick}>Push</button>
        <ul>
          {array1.map(item => <li key={item}>{item}</li>)}
        </ul>
      </div>
    );
  }
}

export default MyComponent;