合并对象数组和内部的子对象数组

// 定义对象数组
const arr1 = [
  { id: 1, name: 'Alice', children: [{ id: 11, name: 'Bob' }, { id: 12, name: 'Charlie' }] },
  { id: 2, name: 'David', children: [{ id: 21, name: 'Eve' }] }
];

const arr2 = [
  { id: 3, name: 'Frank', children: [{ id: 31, name: 'Grace' }] },
  { id: 4, name: 'Helen', children: [] }
];

// 合并对象数组和内部的子对象数组
const mergedArray = [...arr1, ...arr2].map(obj => ({ ...obj, children: [...obj.children] }));

console.log(mergedArray);

[
  { id: 1, name: 'Alice', children: [{ id: 11, name: 'Bob' }, { id: 12, name: 'Charlie' }] },
  { id: 2, name: 'David', children: [{ id: 21, name: 'Eve' }] },
  { id: 3, name: 'Frank', children: [{ id: 31, name: 'Grace' }] },
  { id: 4, name: 'Helen', children: [] }
]