将嵌套的分层数组转换为扁平化对象

const nestedArray = [
  {
    id: 1,
    name: 'Category 1',
    children: [
      {
        id: 11,
        name: 'Subcategory 1-1',
        children: [
          {
            id: 111,
            name: 'Subsubcategory 1-1-1',
            children: []
          },
          {
            id: 112,
            name: 'Subsubcategory 1-1-2',
            children: []
          }
        ]
      },
      {
        id: 12,
        name: 'Subcategory 1-2',
        children: []
      }
    ]
  },
  {
    id: 2,
    name: 'Category 2',
    children: []
  }
];

function flattenNestedArray(nestedArray) {
  const result = {};

  function flatten(array, parentKey = '') {
    array.forEach((item, index) => {
      const key = parentKey ? `${parentKey}.${index}` : `${index}`;

      result[key] = {
        id: item.id,
        name: item.name
      };

      if (item.children && item.children.length > 0) {
        flatten(item.children, key);
      }
    });
  }

  flatten(nestedArray);

  return result;
}

const flattenedObject = flattenNestedArray(nestedArray);
console.log(flattenedObject);

{
  '0': { id: 1, name: 'Category 1' },
  '0.0': { id: 11, name: 'Subcategory 1-1' },
  '0.0.0': { id: 111, name: 'Subsubcategory 1-1-1' },
  '0.0.1': { id: 112, name: 'Subsubcategory 1-1-2' },
  '0.1': { id: 12, name: 'Subcategory 1-2' },
  '1': { id: 2, name: 'Category 2' }
}