迭代嵌套数组以匹配ID

function findElementById(arr, targetId) {
  for (let i = 0; i < arr.length; i++) {
    const element = arr[i];
    if (element.id === targetId) {
      return element;
    }
    if (element.children && element.children.length > 0) {
      const result = findElementById(element.children, targetId);
      if (result) {
        return result;
      }
    }
  }
  return null;
}

// 示例用法
const nestedArray = [
  {
    id: 1,
    name: "A",
    children: [
      {
        id: 2,
        name: "B",
        children: [
          {
            id: 3,
            name: "C",
            children: []
          }
        ]
      },
      {
        id: 4,
        name: "D",
        children: []
      }
    ]
  },
  {
    id: 5,
    name: "E",
    children: []
  }
];

const targetId = 3;
const result = findElementById(nestedArray, targetId);
console.log(result); // 输出: { id: 3, name: "C", children: [] }